10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended September 30, 2011

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to            

Commission File Number 001-32833

TransDigm Group Incorporated

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of incorporation or organization)

41-2101738

(I.R.S. Employer Identification No.)

1301 East 9th Street, Suite 3000, Cleveland, Ohio	44114
(Address of principal executive offices)	(Zip Code)

(216) 706-2960

(Registrants’ telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Common Stock	New York Stock Exchange
(Title)	(Name of exchange on which registered)

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  x     Accelerated filer  ¨     Non-accelerated filer  ¨     Smaller reporting company  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The aggregate market value of the voting and non-voting common stock held by non-affiliates of the registrant as of April 2, 2011, based upon the last sale price of such voting and non-voting common stock on that date, was $4,234,949,579.

The number of shares outstanding of TransDigm Group Incorporated’s common stock, par value $.01 per share, was 50,344,439 as of October 28, 2011.

Documents incorporated by reference: The registrant incorporates by reference in Part III hereof portions of its definitive Proxy Statement for its 2012 Annual Meeting of Stockholders.

TABLE OF CONTENTS

		Page
PART I
ITEM 1	BUSINESS		1
ITEM 1A	RISK FACTORS		6
ITEM 1B	UNRESOLVED STAFF COMMENTS		14
ITEM 2	PROPERTIES		15
ITEM 3	LEGAL PROCEEDINGS		16
PART II
ITEM 5	MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES		17
ITEM 6	SELECTED FINANCIAL DATA		21
ITEM 7	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS		27
ITEM 7A	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK		45
ITEM 8	FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA		45
ITEM 9	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE		45
ITEM 9A	CONTROLS AND PROCEDURES		46
ITEM 9B	OTHER INFORMATION		49
PART III
ITEM 10	DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE		49
ITEM 11	EXECUTIVE COMPENSATION		50
ITEM 12	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS		50
ITEM 13	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS		51
ITEM 14	PRINCIPAL ACCOUNTING FEES AND SERVICES		51
PART IV
ITEM 15	EXHIBITS AND FINANCIAL STATEMENT SCHEDULES		51
	FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA		F-1

Special Note Regarding Forward-Looking Statements

This report on Form 10-K contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and 27A of the Securities Act of 1933, as amended. Discussions containing such forward-looking statements may be found in Items 1,1A, 2, 3, 5 and 7 hereof and elsewhere within this Report generally. In addition, when used in this Report, the words “believes,” “anticipates,” “expects,” “should” and similar words or expressions are intended to identify forward-looking statements. Although the Company (as defined below) believes that its plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, such forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made in this Report. The more important of such risks and uncertainties are set forth under the caption “Risk Factors” and elsewhere in this Report. Many such factors are outside the control of the Company. Consequently, such forward-looking statements should be regarded solely as our current plans, estimates and beliefs. We do not undertake, and specifically decline any obligation, to publicly release the results of any revisions to these forward-looking statements that may be made to reflect any future events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events. All forward-looking statements attributable to the Company or persons acting on its behalf are expressly qualified in their entirety by these cautionary statements.

In this report, the term “TD Group” refers to TransDigm Group Incorporated, which holds all of the outstanding capital stock of TransDigm Inc. The terms “Company,” “TransDigm,” “we,” “us,” “our” and similar terms refer to TD Group, together with TransDigm Inc. and its direct and indirect subsidiaries. References to “fiscal year” mean the year ending or ended September 30. For example, “fiscal year 2011” or “fiscal 2011” means the period from October 1, 2010 to September 30, 2011.

PART I

ITEM 1. BUSINESS

The Company

TransDigm Inc. was formed in July 1993 in connection with the acquisition of certain businesses from IMO Industries Inc. TransDigm Group Incorporated (“TD Group”) was formed in July 2003 to facilitate the acquisition of TransDigm, Inc. In March 2006 and May 2007, certain stockholders of TD Group and certain members of our management sold shares of TD Group common stock in underwritten public offerings. TD Group did not offer any shares of common stock for sale in the offerings and TD Group did not receive any of the proceeds from the sale of shares by the selling stockholders. As a result of the initial public offering in 2006, TD Group’s common stock is publicly traded on the New York Stock Exchange under the ticker symbol “TDG.” As a result of the follow on offering in 2007, TD Group was no longer a “controlled company” for the purposes of the NYSE listing requirements.

On December 6, 2010, TransDigm Inc. completed the acquisition of McKechnie Aerospace Holdings Inc. (“McKechnie Aerospace”), a supplier of aerospace components, assemblies and subsystems, for approximately $1.27 billion. On March 9, 2011, the Company completed the divestiture of the fastener business acquired as part of McKechnie Aerospace for approximately $239.6 million, subject to adjustment. On April 7, 2011, the Company completed the divestiture of Aero Quality Sales, a distributor and service center of aircraft batteries and battery support equipment, for approximately $31.8 million. Neither the non-proprietary fastener business nor the Aero Quality Sales distribution business fit with TransDigm’s overall business direction.

We believe we are a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. Our business is well diversified due to the broad range of products we offer to our customers. We estimate that over 90% of our net sales for fiscal year 2011 were generated by proprietary products. In addition, for fiscal year 2011, we estimate that we generated approximately 75% of our net sales from products for which we are the sole source provider.

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Most of our products generate significant aftermarket revenue. Once our parts are designed into and sold on a new aircraft, we generate net sales from aftermarket consumption over the life of that aircraft, which is generally estimated to be approximately 30 years. A typical platform can be produced for 20 to 30 years, giving us an estimated product life cycle of 50-60 years. We estimate that approximately 56% of our net sales in fiscal year 2011 were generated from aftermarket sales, the vast majority of which come from the commercial and military aftermarkets. These aftermarket revenues have historically produced a higher gross margin and been more stable than sales to original equipment manufacturers, or OEMs.

Products

We primarily design, produce and supply highly-engineered proprietary aerospace components (and certain systems/subsystems) with significant aftermarket content. We seek to develop highly customized products to solve specific needs for aircraft operators and manufacturers. We attempt to differentiate ourselves based on engineering, service and manufacturing capabilities. We typically choose not to compete for non-proprietary “build to print” business because it frequently offers lower margins than proprietary products. We believe that our products have strong brand names within the industry and that we have a reputation for high quality, reliability and customer support.

Our business is well diversified due to the broad range of products that we offer to our customers. Some of our more significant product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, engineered interior surfaces and lighting and control technology.

Sales and Marketing

Consistent with our overall strategy, our sales and marketing organization is structured to continually develop technical solutions that meet customer needs. In particular, we attempt to focus on products and programs that will lead to high-margin, repeatable sales in the aftermarket.

We have structured our sales efforts along our major product offerings, assigning a product manager to certain products. Each product manager is expected to grow the sales and profitability of the products for which he or she is responsible and to achieve the targeted annual level of bookings, sales, new business and profitability for such products. The product managers are assisted by account managers and sales engineers who are responsible for covering major OEM and aftermarket accounts. Account managers and sales engineers are expected to be familiar with the personnel, organization and needs of specific customers, to achieve total bookings and new business goals at each account and, together with the product managers, to determine when additional resources are required at customer locations. Most of our sales personnel are evaluated, in part, on their bookings and their ability to identify and obtain new business opportunities.

Though typically performed by employees, the account manager function may be performed by independent representatives depending on the specific customer, product and geographic location. We also use a number of distributors to provide logistical support as well as primary customer contact with certain smaller accounts. Our major distributors are Aviall, Inc. (a subsidiary of The Boeing Company) and Satair A/S (a Danish public company on whose Board of Directors Mr. Howley, our Chairman and Chief Executive Officer, served through October 2011).

Manufacturing and Engineering

We maintain 25 principal manufacturing facilities. Our manufacturing facilities typically comprise manufacturing, distribution and engineering functions, and most facilities have certain administrative functions,

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including management, sales and finance. We continually strive to improve productivity and reduce costs, including rationalization of operations, developing improved control systems that allow for accurate product profit and loss accounting, investing in equipment, tooling, information systems and implementing broad-based employee training programs. Management believes that our manufacturing systems and equipment contribute to our ability to compete by permitting us to meet the rigorous tolerances and cost sensitive price structure of aircraft component customers.

We attempt to differentiate ourselves from our competitors by producing uniquely engineered products with high quality and timely delivery. Our engineering costs are recorded in Cost of Sales and in Selling and Administrative captions in our Consolidated Statements of Income. Total engineering expense represents approximately 7% of our operating units’ aggregate costs, or approximately 4% of our consolidated net sales. Our proprietary products, and particularly our new product initiatives, are designed by our engineers and are intended to serve the needs of the aircraft component industry. These proprietary designs must withstand the extraordinary conditions and stresses that will be endured by products during use and meet the rigorous demands of our customers’ tolerance and quality requirements.

We use sophisticated equipment and procedures to comply with quality requirements, specifications and Federal Aviation Administration (the “FAA”) and OEM requirements. We perform a variety of testing procedures, including testing under different temperature, humidity and altitude levels, shock and vibration testing and X-ray fluorescent measurement. These procedures, together with other customer approved techniques for document, process and quality control, are used throughout our manufacturing facilities.

Customers

Our customers include: (1) distributors of aerospace components; (2) worldwide commercial airlines, including national and regional airlines; (3) large commercial transport and regional and business aircraft OEMs; (4) various armed forces of the United States and friendly foreign governments; (5) defense OEMs; (6) system suppliers; and (7) various other industrial customers. For the year ended September 30, 2011, Boeing (which includes Aviall, Inc., a distributor of commercial aftermarket parts to airlines throughout the world) accounted for approximately 14% of our net sales. Our top ten customers for fiscal year 2011 accounted for approximately 43% of our net sales. Products supplied to many of our customers are used on multiple platforms.

Active commercial production programs include the Boeing 737, 747, 767, 777 and 787, the Airbus A319/20/21, A330/A340 and A380, the Bombardier CRJ’s and Challenger, the Embraer RJ’s, the Cessna Citation family, the Raytheon Premier and Hawker and most Gulfstream airframes. Military platforms include aircraft such as the Boeing C-17, F-15, F-18 and V-22, the Lockheed Martin C-130J, F-16 and F-35 Joint Strikefighter, the Northrop Grumman E-2C Hawkeye, the UH-60 Blackhawk, CH-47 Chinook and AH-64 Apache helicopters, the General Atomics Predator Drone and the Raytheon Patriot Missile. TransDigm has been awarded numerous contracts for the development of engineered products for production on the Airbus A350XWB, A320 NEO and A400M programs and the Bombardier Learjet 85.

We believe that we have strong customer relationships with almost all large commercial transport, regional, general aviation and military OEMs. The demand for our aftermarket parts and services depends on, among other things, the breadth of our installed OEM base, revenue passenger miles (“RPMs”), the size and age of the worldwide aircraft fleet and, to a lesser extent, airline profitability. We believe that we are also a leading supplier of components used on U.S. designed military aircraft, including components that are used on a variety of fighter aircraft, military freighters and military helicopters.

Competition

The niche markets within the aerospace industry that we serve are relatively fragmented and we face several competitors for many of the products and services we provide. Due to the global nature of the commercial aircraft industry, competition in these categories comes from both U.S. and foreign companies. Competitors in our product offerings range in size from divisions of large public corporations to small privately-held entities, with only one or two components in their entire product portfolios.

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We compete on the basis of engineering, manufacturing and marketing high quality products, which we believe meet or exceed the performance and maintenance requirements of our customers, consistent and timely delivery, and superior customer service and support. The industry’s stringent regulatory, certification and technical requirements, and the investments necessary in the development and certification of products, create barriers to entry for potential new competitors. As long as customers receive products that meet or exceed expectations and performance standards, we believe that they will have a reduced incentive to certify another supplier because of the cost and time of the technical design and testing certification process. In addition, we believe that concerns about safety and flight delays if products are unavailable or undependable are reasons for our customers to continue long-term supplier relationships.

Government Contracts

Companies engaged in supplying defense-related equipment and services to U.S. Government agencies are subject to business risks specific to the defense industry. These risks include the ability of the U.S. Government to unilaterally: (1) suspend us from receiving new contracts pending resolution of alleged violations of procurement laws or regulations; (2) terminate existing contracts; (3) reduce the value of existing contracts; (4) audit our contract-related costs and fees, including allocated indirect costs; and (5) control and potentially prohibit the export of our products.

Governmental Regulation

The commercial aircraft component industry is highly regulated by both the FAA in the United States and by the Joint Aviation Authorities in Europe and other agencies throughout the world, while the military aircraft component industry is governed by military quality specifications. We, and the components we manufacture, are required to be certified by one or more of these entities or agencies, and, in many cases, by individual OEMs, in order to engineer and service parts and components used in specific aircraft models.

We must also satisfy the requirements of our customers, including OEMs and airlines that are subject to FAA regulations, and provide these customers with products and services that comply with the government regulations applicable to commercial flight operations. In addition, the FAA requires that various maintenance routines be performed on aircraft components. We believe that we currently satisfy or exceed these maintenance standards in our repair and overhaul services. We also maintain several FAA approved repair stations.

In addition, sales of many of our products that will be used on aircraft owned by non-U.S. entities are subject to compliance with U.S. export control laws.

Our operations are also subject to a variety of worker and community safety laws. The Occupational Safety and Health Act (“OSHA”), mandates general requirements for safe workplaces for all employees. In addition, OSHA provides special procedures and measures for the handling of certain hazardous and toxic substances.

Raw Materials

We require the use of various raw materials in our manufacturing processes. We also purchase a variety of manufactured component parts from various suppliers. At times, we concentrate our orders among a few suppliers in order to strengthen our supplier relationships. Raw materials and component parts are generally available from multiple suppliers at competitive prices.

Intellectual Property

We have various trade secrets, proprietary information, trademarks, trade names, patents, copyrights and other intellectual property rights, which we believe, in the aggregate but not individually, are important to our business.

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Backlog

As of September 30, 2011, the Company estimated its sales order backlog at $737 million compared to an estimated sales order backlog of $467 million as of September 30, 2010. The increase in backlog is primarily due to the acquisitions of McKechnie Aerospace, Talley Actuation and Schneller Holdings discussed below, totaling approximately $207 million as of September 30, 2011. The majority of the purchase orders outstanding as of September 30, 2011 are scheduled for delivery within the next twelve months. Purchase orders may be subject to cancellation or deferral by the customer prior to shipment. The level of unfilled purchase orders at any given date during the year will be materially affected by the timing of the Company’s receipt of purchase orders and the speed with which those orders are filled. Accordingly, the Company’s backlog as of September 30, 2011 may not necessarily represent the actual amount of shipments or sales for any future period.

Foreign Operations

Although we manufacture substantially all of our products in the United States, we manufacture some products in Belgium, Malaysia and Mexico. We sell our products in the United States, as well as in foreign countries. A number of risks inherent in international operations could have a material adverse effect on our results of operations, including currency fluctuations, difficulties in staffing and managing multi-national operations, general economic and political uncertainties and potential for social unrest in countries in which we operate, limitations on our ability to enforce legal rights and remedies, restrictions on the repatriation of funds, change in trade policies, tariff regulation, difficulties in obtaining export and import licenses and the risk of government financed competition.

Our direct sales to foreign customers were approximately $305.5 million, $170.6 million, and $150.4 million for fiscal years 2011, 2010 and 2009, respectively. Sales to foreign customers are subject to numerous additional risks, including the impact of foreign government regulations, political uncertainties and differences in business practices. There can be no assurance that foreign governments will not adopt regulations or take other action that would have a direct or indirect adverse impact on the business or market opportunities of the Company within such governments’ countries. Furthermore, there can be no assurance that the political, cultural and economic climate outside the United States will be favorable to our operations and growth strategy.

Environmental Matters

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. At certain facilities acquired in connection with the acquisition of McKechnie Aerospace or third-party sites utilized by subsidiaries of McKechnie Aerospace, subsidiaries of the Company have been identified as potentially responsible parties under the federal Superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company’s environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company’s prior experience and professional judgment of the Company’s environmental specialists. Estimates of the Company’s environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

Accordingly, as investigation and remediation proceed, it is likely that adjustments in the Company’s accruals will be necessary to reflect new information. The amounts of any such adjustments could have a

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material adverse effect on the Company’s results of operations or cash flows in a given period. Based on currently available information, however, the Company does not believe that future environmental costs in excess of those accrued with respect to sites for which the Company has been identified as a potentially responsible party are likely to have a material adverse effect on the Company’s financial condition.

Environmental liabilities are recorded when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when the Company has recommended a remedy or has committed to an appropriate plan of action. The liabilities are reviewed periodically and, as investigation and remediation proceed, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not reduced by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites.

Employees

As of September 30, 2011, we had approximately 3,800 full time, part time and temporary employees. Approximately 16% of our employees were represented by labor unions. Collective bargaining agreements between us and these labor unions expire at various dates ranging from February 2012 to April 2014. We consider our relationship with our employees generally to be satisfactory.

Legal Proceedings

We are from time to time subject to, and are presently involved in, litigation or other legal proceedings arising in the ordinary course of business. Based upon information currently known to us, we believe the outcome of such proceedings will not have, individually or in the aggregate, a material adverse effect on our business, our financial condition or results of operations.

Available Information

TD Group’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, including any amendments, will be made available free of charge on the Company’s website, www.transdigm.com, as soon as reasonably practicable, following the filing of the reports with the Securities and Exchange Commission.

ITEM 1A. RISK FACTORS

Set forth below are important risks and uncertainties that could negatively affect our business and financial condition and could cause our actual results to differ materially from those expressed in forward-looking statements contained in this report.

Our business is sensitive to the number of flight hours that our customers’ planes spend aloft, the size and age of the worldwide aircraft fleet and our customers’ profitability. These items are, in turn, affected by general economic conditions.

Our business is directly affected by, among other factors, changes in revenue passenger miles (RPMs), the size and age of the worldwide aircraft fleet and, to a lesser extent, changes in the profitability of the commercial airline industry. RPMs and airline profitability have historically been correlated with the general economic environment, although national and international events also play a key role. For example, in the past decade, the airline industry has been severely affected by the downturn in the global economy, higher fuel prices, the increased security concerns among airline customers following the events of September 11, 2001, the Severe

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Acute Respiratory Syndrome, or SARS, epidemic and the conflicts in Afghanistan and Iraq. In addition, global market and economic conditions have been challenging with continued turbulence in the U.S. and international markets and economies and have prolonged declines in business and consumer spending. As a result of the substantial reduction in airline traffic resulting from these events, the airline industry incurred large losses and financial difficulties. Some carriers have also parked or retired a portion of their fleets and have reduced workforces and flights. During periods of reduced airline profitability, some airlines may delay purchases of spare parts, preferring instead to deplete existing inventories. If demand for new aircraft and spare parts decreases, there would be a decrease in demand for certain of our products.

Our sales to manufacturers of aircraft are cyclical, and a downturn in sales to these manufacturers may adversely affect us.

Our sales to manufacturers of large commercial aircraft, such as The Boeing Company, Airbus S.A.S, and related OEM suppliers, as well as manufacturers of business jets, which accounted for approximately 25% of our net sales in fiscal year 2011, have historically experienced periodic downturns. In the past, these sales have been affected by airline profitability, which is impacted by, among other things, fuel and labor costs, price competition, downturns in the global economy and national and international events, such as the events of September 11, 2001. In addition, sales of our products to manufacturers of business jets are impacted by, among other things, downturns in the global economy. Prior downturns have adversely affected our net sales, gross margin and net income.

We rely heavily on certain customers for much of our sales.

Our largest customer for fiscal year 2011 was The Boeing Company (which includes Aviall, Inc., a distributor of commercial aftermarket parts to airlines throughout the world). Boeing accounted for approximately 14% of our net sales in fiscal year 2011. Our top ten customers for fiscal year 2011 accounted for approximately 43% of our net sales. A reduction in purchasing by one of our larger customers for any reason, such as economic downturn, decreased production or strike, could have a material adverse effect on our net sales, gross margin and net income.

We generally do not have guaranteed future sales of our products. Further, when we enter into fixed price contracts with some of our customers, we take the risk for cost overruns.

As is customary in our business, we do not generally have long-term contracts with most of our aftermarket customers and, therefore, do not have guaranteed future sales. Although we have long-term contracts with many of our OEM customers, many of those customers may terminate the contracts on short notice and, in most cases, our customers have not committed to buy any minimum quantity of our products. In addition, in certain cases, we must anticipate the future volume of orders based upon the historic purchasing patterns of customers and upon our discussions with customers as to their anticipated future requirements, and this anticipated future volume of orders may not materialize.

We also have entered into multi-year, fixed-price contracts with some of our customers, pursuant to which we have agreed to perform the work for a fixed price and, accordingly, realize all the benefit or detriment resulting from any decreases or increases in the costs of making these products. Sometimes we accept a fixed-price contract for a product that we have not yet produced, and this increases the risk of cost overruns or delays in the completion of the design and manufacturing of the product. Most of our contracts do not permit us to recover increases in raw material prices, taxes or labor costs.

U.S. military spending is dependent upon the U.S. defense budget.

The military and defense market is significantly dependent upon government budget trends, particularly the U.S. Department of Defense (the “DOD”) budget. In addition to normal business risks, our supply of products to

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the United States Government is subject to unique risks largely beyond our control. Future DOD budgets could be negatively impacted by several factors, including, but not limited to, a change in defense spending policy by the current presidential administration, the U.S. Government’s budget deficits, spending priorities, the cost of sustaining the U.S. military presence in Iraq and Afghanistan and possible political pressure to reduce U.S. Government military spending, each of which could cause the DOD budget to remain unchanged or to decline. A significant decline in U.S. military expenditures in the future could result in a reduction in the amount of our products sold to the various agencies and buying organizations of the U.S. Government.

We intend to pursue future acquisitions. Our business may be adversely affected if we cannot consummate acquisitions on satisfactory terms, or if we cannot effectively integrate acquired operations.

A significant portion of our growth has occurred through acquisitions. Any future growth through acquisitions will be partially dependent upon the continued availability of suitable acquisition candidates at favorable prices and upon advantageous terms and conditions. We intend to pursue acquisitions that we believe will present opportunities consistent with our overall business strategy. However, we may not be able to find suitable acquisition candidates to purchase or may be unable to acquire desired businesses or assets on economically acceptable terms. In addition, we may not be able to raise the capital necessary to fund future acquisitions. Because we may actively pursue a number of opportunities simultaneously, we may encounter unforeseen expenses, complications and delays, including difficulties in employing sufficient staff and maintaining operational and management oversight.

We regularly engage in discussions with respect to potential acquisition and investment opportunities. If we consummate an acquisition, our capitalization and results of operations may change significantly. Future acquisitions could likely result in the incurrence of additional debt and contingent liabilities and an increase in interest and amortization expenses or periodic impairment charges related to goodwill and other intangible assets as well as significant charges relating to integration costs.

Acquisitions involve risks that the businesses acquired will not perform in accordance with expectations and that business judgments concerning the value, strengths and weaknesses of businesses acquired will prove incorrect. In addition, we may not be able to successfully integrate any business we acquire into our existing business. The successful integration of new businesses depends on our ability to manage these new businesses and cut excess costs. The successful integration of future acquisitions may also require substantial attention from our senior management and the management of the acquired business, which could decrease the time that they have to service, attract customers and develop new products and services or attend to other acquisition opportunities.

We are subject to certain unique business risks as a result of supplying equipment and services to the U.S. Government.

Companies engaged in supplying defense-related equipment and services to U.S. Government agencies are subject to business risks specific to the defense industry. These risks include the ability of the U.S. Government to unilaterally:

• suspend us from receiving new contracts pending resolution of alleged violations of procurement laws or regulations;

• terminate existing contracts;

• reduce the value of existing contracts; and

• audit our contract-related costs and fees, including allocated indirect costs.

Most of our U.S. Government contracts can be terminated by the U.S. Government for its convenience without significant notice. Termination for convenience provisions provide only for our recovery of costs incurred or committed, settlement expenses and profit on the work completed prior to termination.

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On contracts for which the price is based on cost, the U.S. Government may review our costs and performance, as well as our accounting and general business practices. Based on the results of such audits, the U.S. Government may adjust our contract-related costs and fees, including allocated indirect costs. In addition, under U.S. Government purchasing regulations, some of our costs, including most financing costs, amortization of intangible assets, portions of research and development costs, and certain marketing expenses may not be subject to reimbursement.

In addition, even where the price is not based on cost, the U.S. Government may seek to review our costs to determine whether our pricing is “fair and reasonable”. Five of our subsidiaries and divisions were subject to such a pricing review for years 2002 through 2004 and it is possible that we will be subject to a similar pricing review in the future. Such a review could be costly and time consuming for our management and could distract from our ability to effectively manage the business. As a result of such a review, we could be subject to providing a refund to the U.S. Government or we could be asked to enter into an arrangement whereby our prices would be based on cost or the DOD could seek to pursue alternative sources of supply for our parts. Any of those occurrences could lead to a reduction in our revenue from, or the profitability of certain of our supply arrangements with, certain agencies and buying organizations of the U.S. Government.

Our business may be adversely affected if we would lose our government or industry approvals or if more stringent government regulations are enacted or if industry oversight is increased.

The aerospace industry is highly regulated in the United States and in other countries. In order to sell our components, we and the components we manufacture must be certified by the FAA, the DOD and similar agencies in foreign countries and by individual manufacturers. If new and more stringent government regulations are adopted or if industry oversight increases, we might incur significant expenses to comply with any new regulations or heightened industry oversight. In addition, if material authorizations or approvals were revoked or suspended, our business would be adversely affected.

In addition to the aviation approvals, we are at times required to obtain approval from U.S. Government agencies to export our products. Additionally, we are not permitted to export some of our products. A determination by the U.S. Government that we failed to receive required approvals or licenses could eliminate or restrict our ability to sell our products outside the United States, and the penalties that could be imposed by the U.S. Government for failure to comply with these laws could be significant.

Our substantial indebtedness could adversely affect our financial health and could harm our ability to react to changes to our business and prevent us from fulfilling our obligations under our indebtedness.

We have a significant amount of indebtedness. As of September 30, 2011, our total indebtedness was approximately $3,138.4 million, which was approximately 79.5% of our total capitalization.

In addition, we may be able to incur substantial additional indebtedness in the future. For example, as of September 30, 2011, we had approximately $237.0 million of unused commitments under our revolving loan facility. Although our senior secured credit facility and the indentures (the “Indentures”) governing the 7 ³/4% senior subordinated notes issued in December 2010 (the “7 ³/4% Senior Subordinated Notes”) contain restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of significant qualifications and exceptions, and the indebtedness incurred in compliance with these qualifications and exceptions could be substantial. If we incur additional debt, the risks associated with our substantial leverage would increase.

Our substantial indebtedness could have important consequences to investors. For example, it could:

• increase our vulnerability to general economic downturns and industry conditions;

• require us to dedicate a substantial portion of our cash flow from operations to payments on our indebtedness, thereby reducing the availability of our cash flow to fund working capital, capital expenditures, research and development efforts and other general corporate requirements;

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• limit our flexibility in planning for, or reacting to, changes in our business and the industry in which we operate;

• place us at a competitive disadvantage compared to competitors that have less debt; and

• limit, along with the financial and other restrictive covenants contained in the documents governing our indebtedness, among other things, our ability to borrow additional funds, make investments and incur liens.

In addition, all of our debt under the senior secured credit facility, which includes a $1.55 billion term loan facility and a revolving loan facility of $245 million, bears interest at floating rates. Accordingly, in the event that interest rates increase, our debt service expense will also increase. In order to reduce the floating interest rate risk, as of September 30, 2011, the Company was party to three forward starting interest rate swap agreements that fix the rate of interest beginning December 31, 2012 through June 30, 2015 on an aggregate notional amount of $353 million of debt under the senior secured credit facility.

Our substantial level of indebtedness increases the possibility that we may be unable to generate cash sufficient to pay, when due, the principal of, interest on or other amounts due in respect of our indebtedness, including the 7 ³/4% Senior Subordinated Notes. We cannot assure you that our business will generate sufficient cash flow from operations or that future borrowings will be available to us under the senior secured credit facility or otherwise in amounts sufficient to enable us to service our indebtedness. If we cannot service our debt, we will have to take actions such as reducing or delaying capital investments, selling assets, restructuring or refinancing our debt or seeking additional equity capital.

To service our indebtedness, we will require a significant amount of cash. Our ability to generate cash depends on many factors beyond our control and any failure to meet our debt service obligations could harm our business, financial condition and results of operations.

Our ability to make payments on our indebtedness, including the 7 ³/4% Senior Subordinated Notes and amounts borrowed under the credit facilities, and to fund our operations, will depend on our ability to generate cash in the future, which, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control.

We cannot assure you, however, that our business will generate sufficient cash flow from operations, that currently anticipated cost savings and operating improvements will be realized on schedule or at all or that future borrowings will be available to us under the senior secured credit facility or otherwise in amounts sufficient to enable us to service our indebtedness, including the amounts borrowed under the senior secured credit facility and the 7 ³/4% Senior Subordinated Notes, or to fund our other liquidity needs. If we cannot service our debt, we will have to take actions such as reducing or delaying capital investments, selling assets, restructuring or refinancing our debt or seeking additional equity capital. We cannot assure you that any of these remedies could, if necessary, be effected on commercially reasonable terms, or at all. Our ability to restructure or refinance our debt will depend on the condition of the capital markets and our financial condition at such time. Any refinancing of our debt could be at higher interest rates and may require us to comply with more onerous covenants, which could further restrict our business operations. The terms of existing or future debt instruments, the Indentures and the senior secured credit facility may restrict us from adopting any of these alternatives. In addition, any failure to make payments of interest and principal on our outstanding indebtedness on a timely basis would likely result in a reduction of our credit rating, which could harm our ability to incur additional indebtedness on acceptable terms and would otherwise adversely affect the 7 ³/4% Senior Subordinated Notes.

The terms of the senior secured credit facility and Indentures may restrict our current and future operations, particularly our ability to respond to changes or to take certain actions.

Our senior secured credit facility and the Indentures contain a number of restrictive covenants that impose significant operating and financial restrictions on TD Group, TransDigm Inc. and its subsidiaries (in the case of

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the senior secured credit facility) and TransDigm Inc. and its subsidiaries (in the case of the Indentures) and may limit their ability to engage in acts that may be in our long-term best interests. The senior secured credit facility and Indentures include covenants restricting, among other things, the ability of TD Group, TransDigm Inc. and its subsidiaries (in the case of the senior secured credit facility) and TransDigm Inc. and its subsidiaries (in the case of the Indentures) to:

• incur or guarantee additional indebtedness or issue preferred stock;

• pay distributions on, redeem or repurchase our capital stock or redeem or repurchase our subordinated debt;

• make investments;

• sell assets;

• enter into agreements that restrict distributions or other payments from our restricted subsidiaries to us;

• incur or allow to exist liens;

• consolidate, merge or transfer all or substantially all of our assets;

• engage in transactions with affiliates;

• create unrestricted subsidiaries; and

• engage in certain business activities.

A breach of any of these covenants could result in a default under the senior secured credit facility or the Indentures. If any such default occurs, the lenders under the senior secured credit facility and the holders of the 7 ³/4% Senior Subordinated Notes may elect to declare all outstanding borrowings, together with accrued interest and other amounts payable thereunder, to be immediately due and payable. The lenders under the senior secured credit facility also have the right in these circumstances to terminate any commitments they have to provide further borrowings. In addition, following an event of default under the senior secured credit facility, the lenders under that facility will have the right to proceed against the collateral granted to them to secure the debt, which includes our available cash, and they will also have the right to prevent us from making debt service payments on the 7 ³/4% Senior Subordinated Notes. If the debt under the senior secured credit facility or the 7 ³/4% Senior Subordinated Notes were to be accelerated, we cannot assure you that our assets would be sufficient to repay in full our debt.

We could incur substantial costs as a result of violations of or liabilities under environmental laws and regulations.

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. At certain facilities acquired in connection with the acquisition of McKechnie Aerospace or third-party sites utilized by subsidiaries of McKechnie Aerospace, subsidiaries of the Company have been identified as potentially responsible parties under the federal Superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company’s environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company’s prior experience and professional judgment of the Company’s environmental specialists. Estimates of the Company’s environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

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Accordingly, as investigation and remediation proceed, it is likely that adjustments in the Company’s accruals will be necessary to reflect new information. The amounts of any such adjustments could have a material adverse effect on the Company’s results of operations or cash flows in a given period. Based on currently available information, however, the Company does not believe that future environmental costs in excess of those accrued with respect to sites for which the Company has been identified as a potentially responsible party are likely to have a material adverse effect on the Company’s financial condition.

Environmental liabilities are recorded when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when the Company has recommended a remedy or has committed to an appropriate plan of action. The liabilities are reviewed periodically and, as investigation and remediation proceed, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not reduced by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites.

We are dependent on our highly trained employees and any work stoppage or difficulty hiring similar employees could adversely affect our business.

Because our products are complicated and highly engineered, we depend on an educated and trained workforce. There is substantial competition for skilled personnel in the aircraft component industry, and we could be adversely affected by a shortage of skilled employees. We may not be able to fill new positions or vacancies created by expansion or turnover or attract and retain qualified personnel.

As of September 30, 2011, we had approximately 3,800 full time, part time and temporary employees. Approximately 16% of our employees were represented by labor unions. Collective bargaining agreements between us and these labor unions expire at various dates ranging from February 2012 to April 2014. We consider our relationship with our employees generally to be satisfactory. Although we believe that our relations with our employees are satisfactory, we cannot assure you that we will be able to negotiate a satisfactory renewal of these collective bargaining agreements or that our employee relations will remain stable. Because we maintain a relatively small inventory of finished goods, any work stoppage could materially and adversely affect our ability to provide products to our customers.

Our business is dependent on the availability of certain components and raw materials from suppliers.

Our business is affected by the price and availability of the raw materials and component parts that we use to manufacture our components. Our business, therefore, could be adversely impacted by factors affecting our suppliers (such as the destruction of our suppliers’ facilities or their distribution infrastructure, a work stoppage or strike by our suppliers’ employees or the failure of our suppliers to provide materials of the requisite quality), or by increased costs of such raw materials or components if we were unable to pass along such price increases to our customers. Because we maintain a relatively small inventory of raw materials and component parts, our business could be adversely affected if we were unable to obtain these raw materials and components from our suppliers in the quantities we require or on favorable terms. Although we believe in most cases that we could identify alternative suppliers, or alternative raw materials or component parts, the lengthy and expensive FAA and OEM certification processes associated with aerospace products could prevent efficient replacement of a supplier, raw material or component part.

Our facilities are located near known earthquake fault zones, and the occurrence of an earthquake or other natural disaster could cause damage to our facilities and equipment, which could require us to curtail or cease operations.

Six of our manufacturing facilities are located in the greater Los Angeles area, an area known for earthquakes, and are thus vulnerable to damage. We are also vulnerable to damage from other types of disasters,

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including power loss, fire, explosions, floods, communications failures, terrorist attacks and similar events. If any disaster were to occur, our ability to operate our business at our facilities could be impaired.

We have recorded a significant amount of intangible assets, which may never generate the returns we expect.

Mergers and acquisitions have resulted in significant increases in identifiable intangible assets and goodwill. Identifiable intangible assets, which primarily include trademarks, trade names, trade secrets, license agreements and technology, were approximately $828.4 million at September 30, 2011, representing approximately 18% of our total assets. Goodwill recognized in accounting for the mergers and acquisitions was approximately $2,595.7 million at September 30, 2011, representing approximately 58% of our total assets. We may never realize the full value of our identifiable intangible assets and goodwill, and to the extent we were to determine that our identifiable intangible assets or our goodwill were impaired within the meaning of applicable accounting standards, we would be required to write-off the amount of any impairment.

We face significant competition.

We operate in a highly competitive global industry and compete against a number of companies. Competitors in our product lines are both U.S. and foreign companies and range in size from divisions of large public corporations to small privately held entities. We believe that our ability to compete depends on high product performance, consistent high quality, short lead-time and timely delivery, competitive pricing, superior customer service and support and continued certification under customer quality requirements and assurance programs. We may have to adjust the prices of some of our products to stay competitive.

We could be adversely affected if one of our components causes an aircraft to crash.

Our operations expose us to potential liabilities for personal injury or death as a result of the failure of an aircraft component that we have designed, manufactured or serviced. While we maintain liability insurance to protect us from future products liability claims, in the event of product liability claims our insurers may attempt to deny coverage or any coverage we have may not be adequate. We also may not be able to maintain insurance coverage in the future at an acceptable cost. Any liability not covered by insurance or for which third party indemnification is not available could result in significant liability to us.

In addition, a crash caused by one of our components could damage our reputation for quality products. We believe our customers consider safety and reliability as key criteria in selecting a provider of aircraft components. If a crash were to be caused by one of our components, or if we were to otherwise fail to maintain a satisfactory record of safety and reliability, our ability to retain and attract customers may be materially adversely affected.

Our stock price may be volatile, and your investment in our common stock could suffer a decline in value.

There has been significant volatility in the market price and trading volume of equity securities, which is unrelated to the financial performance of the companies issuing the securities. These broad market fluctuations may negatively affect the market price of our common stock. You may not be able to sell your shares at or above the purchase price due to fluctuations in the market price of our common stock caused by changes in our operating performance or prospects, including possible changes due to the cyclical nature of the aerospace industry and other factors such as fluctuations in OEM and aftermarket ordering, which could cause short-term swings in profit margins, or unrelated to our operating performance, including market conditions affecting the stock market generally or the stocks of aerospace companies more specifically.

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Future sales of our common stock in the public market could lower our share price.

We may sell additional shares of common stock into the public markets or issue convertible debt securities to raise capital in the future. The market price of our common stock could decline as a result of sales of a large number of shares of our common stock in the public markets or the perception that these sales could occur. These sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities to raise capital at a time and price that we deem appropriate.

Our corporate documents and Delaware law contain certain provisions that could discourage, delay or prevent a change in control of our company.

Provisions in our amended and restated certificate of incorporation and bylaws may discourage, delay or prevent a merger or acquisition involving us that our stockholders may consider favorable. For example, our amended and restated certificate of incorporation authorizes our Board of Directors to issue up to 149,600,000 shares of “blank check” preferred stock. Without stockholder approval, the Board of Directors has the authority to attach special rights, including voting and dividend rights, to this preferred stock. With these rights, holders of preferred stock could make it more difficult for a third party to acquire us. In addition, our amended and restated certificate of incorporation provides for a staggered Board of Directors, whereby directors serve for three-year terms, with approximately one-third of the directors coming up for re-election each year. Having a staggered board will make it more difficult for a third party to obtain control of our Board of Directors through a proxy contest, which may be a necessary step in an acquisition of us that is not favored by our Board of Directors. Our amended and restated certificate of incorporation also provides that the affirmative vote of the holders of at least 75% of the voting power of our issued and outstanding capital stock, voting together as a single class, is required for the alteration, amendment or repeal of certain provisions of our amended and restated certificate of incorporation, including the provisions authorizing a staggered board, and certain provisions of our amended and restated bylaws, including the provisions relating to our stockholders’ ability to call special meetings, notice provisions for stockholder business to be conducted at an annual meeting, requests for stockholder lists and corporate records, nomination and removal of directors, and filling of vacancies on our Board of Directors.

We are also subject to the anti-takeover provisions of Section 203 of the Delaware General Corporation Law. Under these provisions, if anyone becomes an “interested stockholder,” we may not enter into a “business combination” with that person for three years without special approval, which could discourage a third party from making a takeover offer and could delay or prevent a change of control. For purposes of Section 203, “interested stockholder” means, generally, someone owning 15% or more of our outstanding voting stock or an affiliate of ours that owned 15% or more of our outstanding voting stock during the past three years, subject to certain exceptions as described in Section 203.

We do not intend to pay regular cash dividends on our stock.

Notwithstanding the special cash dividend paid in October 2009, we do not anticipate declaring or paying regular cash dividends on our common stock or any other equity security in the foreseeable future. The amounts that may be available to us to pay cash dividends are restricted under our debt and other agreements. Any payment of cash dividends on our common stock in the future will be at the discretion of our Board of Directors and will depend on our results of operations, earnings, capital requirements, financial condition, future prospects, contractual restrictions and other factors deemed relevant by our Board of Directors. Therefore, you should not rely on dividend income from shares of our common stock.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

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ITEM 2. PROPERTIES

TransDigm’s owned properties as of September 30, 2011 are as follows:

Location	Square Footage
Liberty, SC		219,000
Waco, TX		218,800
Los Angeles, CA		131,000
Kent, OH		107,300
Pinellas Park, FL		103,900
Addison, IL		83,300
Seattle, WA		78,000
Placentia, CA		75,000
Painesville, OH		63,900
Wichita, KS		57,000
South Euclid, OH		50,000
Avenel, NJ		48,500
Belgium		45,700
Valencia, CA		38,000
Rancho Cucamonga, CA		32,700
Malaysia		24,800
Deerfield, FL		20,000

The properties listed above, except Valencia, Kent, Pinellas Park, Belgium and Malaysia are subject to mortgage liens under our senior secured credit facility. The Seattle property is currently held for sale.

TransDigm’s leased properties as of September 30, 2011 are as follows:

Location	Square Footage
Dayton, NV		144,000
Everett, WA		111,000
Fullerton, CA		100,000
Collegeville, PA		90,000
Camarillo, CA		70,000
Matamoros, Mexico		60,500
Tempe, AZ		40,200
Northridge, CA		35,000
Simi Valley, CA		33,400
Nogales, MX		27,000
Gardena, CA		25,000
Maysville, KY		23,500
Hebron, KY		21,700
Tucson, AZ		18,500
Bellevue, WA		18,000
Cleveland, OH		12,400
Wichita, KS		10,000
Placentia, CA		8,400
Irvine, CA		5,600
Brownsville, TX		2,500
Paris, France		2,100
Wichita, KS		1,700
Singapore		1,700

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TransDigm also leases certain of its other non-material facilities. Management believes that our machinery, plants and offices are in satisfactory operating condition and that it will have sufficient capacity to meet foreseeable future needs without incurring significant additional capital expenditures.

ITEM 3. LEGAL PROCEEDINGS

During the ordinary course of business, TransDigm is from time to time threatened with, or may become a party to, legal actions and other proceedings related to its businesses, products or operations. While TransDigm is currently involved in some legal proceedings, management believes the results of these proceedings will not have a material effect on its financial condition, results of operations, or cash flows.

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock is traded on the New York Stock Exchange, or NYSE, under the ticker symbol “TDG.” The following chart sets forth, for the periods indicated, the high and low sales prices of the common stock on the NYSE.

Quarterly Stock Prices
	High		Low
Fiscal 2010
For Quarter ended January 2, 2010	$	50.94	$	38.92
For Quarter ended April 3, 2010		54.48		46.54
For Quarter ended July 3, 2010		57.31		48.68
For Quarter ended September 30, 2010		64.67		49.22
Fiscal 2011
For Quarter ended January 1, 2011		72.93		60.89
For Quarter ended April 2, 2011		85.38		72.46
For Quarter ended July 2, 2011		94.08		76.82
For Quarter ended September 30, 2011		95.04		73.76

Holders

We estimate that there were approximately 4,900 beneficial holders of our common stock as of October 31, 2011.

Dividends

In October 2009 TD Group’s Board of Directors declared a special cash dividend of $7.65 on each outstanding share of common stock.

We do not anticipate declaring or paying regular cash dividends on our common stock in the near future. Any payment of cash dividends on our common stock in the future will be at the discretion of our Board of Directors and will depend upon our results of operations, earnings, capital requirements, financial condition, future prospects, contractual restrictions, and other factors deemed relevant by our Board of Directors. TD Group is a holding company and conducts all of its operations through direct and indirect subsidiaries. Unless TD Group receives dividends, distributions, advances, transfers of funds or other payments from our subsidiaries, TD Group will be unable to pay any dividends on our common stock in the future. The ability of any subsidiaries to take any of the foregoing actions is limited by the terms of our debt documents and may be limited by future debt or other agreements that we may enter into.

Performance Graph

Set forth below is a line graph comparing the cumulative total return of a hypothetical investment in the shares of common stock of TD Group with the cumulative total return of a hypothetical investment in each of the S&P Midcap 400 Index, S&P MidCap 400 S&P Aerospace & Defense Index, S&P SmallCap 600 Index and the S&P SmallCap 600 Aerospace & Defense Index based on the respective market prices of each such investment on the dates shown below, assuming an initial investment of $100 on September 30, 2006. The Company has concluded that the S&P Midcap 400 Index and the S&P MidCap 400 S&P Aerospace & Defense Index allow for more appropriate comparisons, as compared to the S&P SmallCap 600 Index and S&P SmallCap 600 Aerospace & Defense Index previously used, due to the growth in the market capitalization of TD Group.

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The following performance graph and related information shall not be deemed “soliciting material” nor to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, each as amended, except to the extent we specifically incorporate it by reference into such filing.

	9/06		9/07		9/08		9/09		9/10		9/11
TransDigm Group, Inc		100.00		187.18		140.17		203.97		297.83		392.00
S&P Smallcap 600		100.00		114.93		99.04		88.53		101.12		101.33
S&P Midcap 400		100.00		118.76		98.95		95.87		112.92		111.47
S&P SmallCap 600 S&P Aerospace & Defense		100.00		140.09		120.36		98.31		102.15		101.00
S&P MidCap 400 S&P Aerospace & Defense		100.00		163.45		101.18		100.06		129.49		129.63

Purchases of Equity Securities by the Issuer or Affiliated Purchaser

On August 22, 2011, the Board of Directors authorized a common share repurchase program, which was announced on August 23, 2011. Under the terms of the program, the Company may purchase up to a maximum aggregate value of $100 million of its shares of common stock. At September 30, 2011, no shares were

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repurchased under this program. The program replaces the repurchase program announced on October 23, 2008, under which the Company previously repurchased 494,100 shares of its common stock at a gross cost of approximately $15.2 million at a weighted-average price per share of $30.85. No purchases were made under that program during the year.

Equity Compensation Plan Information

Plan category	Number of Securities to Be Issued upon Exercise of Outstanding Options, Warrants and Rights (a)		Weighted-Average Exercise Price of Outstanding Options, Warrants and Rights (b)		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (excluding securities reflected in column (a)) (c)
Equity compensation plans approved by security holders(1)		6,816,731	$	35.24		3,477,980
Equity compensation plans not approved by security holders(2)		48,096	$	6.68		N/A
Total		6,864,827				3,477,980

(1) Includes information related to the 2003 stock option plan and the 2006 stock incentive plan, each as described below.

(2) Options issued outside of the 2003 stock option plan and the 2006 stock incentive plan.

2003 Stock Option Plan

In connection with the acquisition of the Company by Warburg Pincus in 2003, TD Group adopted a stock option plan for the benefit of our employees. The stock option plan has been amended and restated on several occasions, most recently effective as of July 18, 2008 and we refer to such stock option plan as it is currently in effect as the 2003 stock option plan.

Upon the closing of the acquisition of the Company by Warburg Pincus, certain employees rolled over certain then-existing options to purchase shares of common stock of TransDigm Inc.’s former holding company with an aggregate intrinsic value of approximately $35.7 million into a combination of options to purchase shares of common stock of TD Group, or rollover options, and interests in the two deferred compensation plans which have since been terminated. These employees were granted rollover options to purchase an aggregate of 3,870,152 shares of TD Group common stock, which gives effect to the 149.60 for 1.00 stock split that we effected on March 14, 2006 in connection with our initial public offering. All rollover options granted in connection with the closing of the acquisition were fully vested on the date of grant. As of September 30, 2011, there were rollover options to purchase 84,436 shares of TD Group common stock issued and outstanding (after giving effect to the stock split).

In addition to the shares of TD Group common stock reserved for issuance upon exercise of rollover options, under the terms of the 2003 stock option plan, an aggregate of 5,469,301 shares of TD Group common stock are reserved for issuance upon exercise of new management options (after giving effect to the stock split). As of September 30, 2011, there were new management options to purchase 2,096,210 shares of TD Group common stock outstanding (after giving effect to the stock split). As of September 30, 2011, there were 77,829 shares available for issuance under options not yet granted.

2006 Stock Incentive Plan

Prior to the consummation of its initial public offering, TD Group adopted a new stock incentive plan, which was amended on October 20, 2006, July 29, 2008 and March 3, 2011, designed to assist us in attracting,

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retaining, motivating and rewarding key employees, directors or consultants, and promoting the creation of long-term value for stockholders of TD Group by closely aligning the interests of these individuals with those of our stockholders. The 2006 stock incentive plan permits TD Group to award our key employees, directors or consultants stock options, restricted stock and other stock-based incentives. The total number of shares of TD Group common stock reserved for issuance or delivery under the 2006 stock incentive plan is 8,119,668, subject to adjustment in the event of any stock dividend or split, reorganization, recapitalization, merger, share exchange or any other similar corporate transaction or event. As of September 30, 2011, there were 3,848 restricted shares issued and outstanding under the 2006 stock incentive plan that had been issued to directors as restricted stock. In addition, options to purchase 4,697,493 shares had been issued thereunder, of which 4,636,085 were outstanding. As of September 30, 2011, there were 3,400,151 shares available for issuance under options not yet granted.

Other Option Awards

In connection with the acquisition of the Company by Warburg Pincus, the Company issued 132,096 options to Michael Graff, a director of the Company. Because Mr. Graff was not an employee of the Company and because participation in the 2003 Stock Option Plan was limited to employees, the options were issued outside of the 2003 Stock Option Plan. All of the options awarded to Mr. Graff are vested. As of September 30, 2011, 48,096 options remained outstanding and exercisable.

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ITEM 6. SELECTED FINANCIAL DATA

The following table sets forth selected historical consolidated financial and other data of TD Group for the fiscal years ended September 30, 2007 to 2011 which have been derived from TD Group’s audited consolidated financial statements.

Separate historical financial information of TransDigm Inc. is not presented since the 7 ³/4% Senior Subordinated Notes are guaranteed by TD Group and all direct and indirect domestic restricted subsidiaries of TransDigm Inc. and since TD Group has no operations or significant assets separate from its investment in TransDigm Inc.

Acquisitions of businesses and product lines completed by TD Group during the last five fiscal years are as follows:

• On October 3, 2006, TransDigm Inc. acquired all of the outstanding capital stock of CDA InterCorp.

• On February 7, 2007, TransDigm completed the merger with Aviation Technologies, Inc. (“ATI”), resulting in ATI becoming a wholly-owned subsidiary of TransDigm Inc.

• On August 10, 2007, Bruce Aerospace, Inc., a newly formed subsidiary of TransDigm Inc., acquired certain assets and assumed certain liabilities of Bruce Industries, Inc.

• On May 7, 2008, TransDigm Inc. acquired all of the outstanding capital stock of CEF Industries, Inc.

• On September 26, 2008, Champion Aerospace LLC, a subsidiary of TransDigm Inc., acquired certain product line assets from Unison Industries, LLC, a GE Aviation business.

• On December 16, 2008, TransDigm Inc. acquired all of the outstanding capital stock of Aircraft Parts Corporation.

• On July 24, 2009, TransDigm Inc. acquired all of the outstanding capital stock of Acme Aerospace, Inc.

• On August 10, 2009, AeroControlex Group, Inc., a subsidiary of TransDigm Inc., acquired certain product line assets of Woodward HRT, Inc., a subsidiary of Woodward Governor Company.

• On December 2, 2009, Dukes Aerospace, Inc., a newly formed subsidiary of TransDigm Inc., acquired certain assets and liabilities from Dukes, Inc. and GST Industries, Inc.

• On September 3, 2010, TransDigm Inc. acquired all of the outstanding capital stock of Semco Instruments, Inc.

• On December 6, 2010, TransDigm Inc. acquired all of the outstanding capital stock of McKechnie Aerospace Holdings, Inc.

• On December 31, 2010, TransDigm Inc. acquired the actuation business of Telair International, Inc.

• On August 31, 2011, TransDigm Inc. acquired all of the outstanding limited liability units of Schneller Holdings LLC.

All of the acquisitions were accounted for using the acquisition method. The results of operations of the acquired businesses and product lines are included in TD Group’s consolidated financial statements from the date of each of the acquisitions.

Non-GAAP Financial Measures

We present below certain financial information based on our EBITDA and EBITDA As Defined. References to “EBITDA” mean earnings before interest, taxes, depreciation and amortization, and references to “EBITDA As Defined” mean EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliations of net income to EBITDA and EBITDA As Defined and the reconciliations of net cash provided by operating activities to EBITDA and EBITDA As Defined presented below.

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Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under accounting principles generally accepted in the United States of America (“GAAP”). We present EBITDA and EBITDA As Defined because we believe they are useful indicators for evaluating operating performance and liquidity.

Our management believes that EBITDA and EBITDA As Defined are useful as indicators of liquidity because securities analysts, investors, rating agencies and others use EBITDA to evaluate a company’s ability to incur and service debt. In addition, EBITDA As Defined is useful to investors because the revolving credit facility under our senior secured credit facility requires compliance, on a pro forma basis, with a financial covenant that measures the ratio of the amount of our secured indebtedness to the amount of our Consolidated EBITDA defined in the same manner as we define EBITDA As Defined herein. This financial covenant is a material term of our senior secured credit facility as the failure to comply with such financial covenant could result in an event of default in respect of the revolving credit facility (and such an event of default could, in turn, result in an event of default under the Indenture governing our 7 ³/4% Senior Subordinated Notes).

In addition to the above, our management uses EBITDA As Defined to review and assess the performance of the management team in connection with employee incentive programs and to prepare its annual budget and financial projections. Moreover, our management uses EBITDA As Defined to evaluate acquisitions.

Although we use EBITDA and EBITDA As Defined as measures to assess the performance of our business and for the other purposes set forth above, the use of these non-GAAP financial measures as analytical tools has limitations, and you should not consider any of them in isolation, or as a substitute for analysis of our results of operations as reported in accordance with GAAP. Some of these limitations are:

• neither EBITDA nor EBITDA As Defined reflects the significant interest expense, or the cash requirements necessary to service interest payments, on our indebtedness;

• although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and neither EBITDA nor EBITDA As Defined reflects any cash requirements for such replacements;

• the omission of the substantial amortization expense associated with our intangible assets further limits the usefulness of EBITDA and EBITDA As Defined;

• neither EBITDA nor EBITDA As Defined includes the payment of taxes, which is a necessary element of our operations; and

• EBITDA As Defined excludes the cash expense we have incurred to integrate acquired businesses into our operations, which is a necessary element of certain of our acquisitions.

Because of these limitations, EBITDA and EBITDA As Defined should not be considered as measures of discretionary cash available to us to invest in the growth of our business. Management compensates for these limitations by not viewing EBITDA or EBITDA As Defined in isolation and specifically by using other GAAP measures, such as net income, net sales and operating profit, to measure our operating performance. Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under GAAP, and neither should be considered as an alternative to net income or cash flow from operations determined in accordance with GAAP. Our calculation of EBITDA and EBITDA As Defined may not be comparable to the calculation of similarly titled measures reported by other companies.

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The information presented below should be read together with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the consolidated financial statements and accompanying notes included elsewhere herein.

	Fiscal Years Ended September 30,
	2011		2010		2009		2008		2007
	(in thousands, except per share amounts)
Statement of Operations Data:
Net Sales	$	1,206,021	$	827,654	$	761,552	$	713,711	$	592,798
Gross profit(1)		661,185		473,066		429,346		385,931		309,032
Selling and administrative expenses		133,711		94,918		80,018		74,650		62,890
Amortization of intangible assets		40,339		15,079		13,928		12,002		12,304
Income from operations(1)		487,135		363,069		335,400		299,279		233,838
Refinancing costs		72,454		—		—		—		—
Interest expense—net		185,256		112,234		84,398		92,677		91,767
Income from continuing operations before income taxes		229,425		250,835		251,002		206,602		142,071
Income tax provision		77,200		87,390		88,100		73,476		53,426
Income from continuing operations		152,225		163,445		162,902		133,126		88,645
Income from discontinued operations, net of tax		19,909		—		—		—		—
Net income	$	172,134	$	163,445	$	162,902	$	133,126	$	88,645
Net income applicable to common stock	$	169,323	$	133,132	$	162,902	$	133,126	$	88,645
Denominator for basic and diluted earnings per share under the two-class method:
Weighted-average common shares outstanding		49,888		49,171		48,481		47,856		45,630
Vested options deemed participating securities		3,445		3,752		4,058		4,242		4,934
Total shares for basic and diluted earnings per share		53,333		52,923		52,539		52,098		50,564
Net earnings per share:
Net earnings per share from continuing operations—basic and diluted	$	2.80	$	2.52	$	3.10	$	2.56	$	1.75
Net earnings per share from discontinued operations— basic and diluted		0.37		—		—		—		—
Net earnings per share(2)	$	3.17	$	2.52	$	3.10	$	2.56	$	1.75
Cash dividends paid per common share	$	—	$	7.65	$	—	$	—	$	—

	As of September 30,
	2011		2010		2009		2008		2007
	(in thousands)
Balance Sheet Data:
Cash and cash equivalents	$	376,183	$	234,112	$	190,167	$	159,062	$	105,946
Working capital		663,433		470,496		395,002		334,932		298,380
Total assets		4,513,636		2,677,818		2,454,440		2,255,821		2,061,053
Long-term debt, including current portion		3,138,375		1,771,646		1,356,761		1,357,230		1,357,854
Stockholders’ equity		810,949		592,979		819,162		653,900		487,551

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	Fiscal Years Ended September 30,
	2011			2010			2009			2008			2007
	(in thousands)
Other Financial Data:
Cash flows provided by (used in):
Operating activities	$	260,578		$	197,304		$	197,112		$	189,635		$	112,436
Investing activities		(1,397,028	)		(176,559	)		(168,388	)		(165,044	)		(521,665	)
Financing activities		1,278,521			23,200			2,381			28,525			453,958
Depreciation and amortization		60,460			30,165			27,521			25,254			23,952
Capital expenditures		18,026			12,887			13,155			10,884			10,258
Ratio of earnings to fixed charges(3)		2.2x			3.2x			3.9x			3.2x			2.5x
Other Data:
EBITDA(4)	$	475,141		$	393,234		$	362,921		$	324,533		$	257,790
EBITDA As Defined(4)	$	589,874		$	411,609		$	374,690		$	333,077		$	274,708

(1) Gross profit and income from operations include the effect of charges relating to purchase accounting adjustments to inventory associated with the acquisition of various businesses and product lines for the fiscal years ended September 30, 2011, 2010, 2009, 2008 and 2007 of $18,073,000, $4,794,000, $2,264,000, $1,933,000, and $6,392,000, respectively.

(2) Net earnings per share is calculated by dividing net income applicable to common stock by the basic and diluted weighted average common shares outstanding.

(3) For purposes of computing the ratio of earnings to fixed charges, earnings consist of earnings from continuing operations before income taxes plus fixed charges. Fixed charges consist of interest expense, amortization of debt issuance costs and the portion (approximately 33%) of rental expense that management believes is representative of the interest component of rental expense.

(4) EBITDA represents earnings from continuing operations before interest, taxes, depreciation and amortization. EBITDA As Defined represents EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliation of net income to EBITDA and EBITDA As Defined and the reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined presented below. See “Non-GAAP Financial Measures” for additional information and limitations regarding these non-GAAP financial measures.

24

The following table sets forth a reconciliation of net income to EBITDA and EBITDA As Defined:

	Fiscal Years Ended September 30,
	2011			2010		2009		2008		2007
	(in thousands)
Net income	$	172,134		$	163,445	$	162,902	$	133,126	$	88,645
Less income from discontinued operations		19,909			—		—		—		—
Income from continuing operations		152,225			163,445		162,902		133,126		88,645
Adjustments:
Depreciation and amortization expense		60,460			30,165		27,521		25,254		23,952
Interest expense, net		185,256			112,234		84,398		92,677		91,767
Income tax provision		77,200			87,390		88,100		73,476		53,426
EBITDA, excluding discontinued operations		475,141			393,234		362,921		324,533		257,790
Adjustments:
Inventory purchase accounting adjustments(1)		18,073			4,794		2,264		1,933		6,392
Acquisition integration costs(2)		11,821			4,171		3,426		393		2,037
Acquisition transaction-related expenses(3)		2,817			2,717		—		—		—
Non-cash compensation and deferred compensation costs(4)		12,568			6,693		6,079		6,218		5,482
Acquisition earnout adjustment(5)		(3,000	)		—		—		—		—
Refinancing costs(6)		72,454			—		—		—		—
Public offering costs(7)		—			—		—		—		1,691
Acquisition earnout costs(8)		—			—		—		—		850
Write-down of certain property held for sale		—			—		—		—		466
EBITDA As Defined	$	589,874		$	411,609	$	374,690	$	333,077	$	274,708

(1) Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

(2) Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

(3) Represents, for periods after October 1, 2009, transaction-related costs comprising deal fees; legal, financial and tax due diligence expenses; and valuation costs that are now required to be expensed as incurred.

(4) Represents the compensation expense recognized by TD Group under our stock option and deferred compensation plans.

(5) Represents the reversal of a portion of the earn-out liability related to the Dukes Aerospace acquisition based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement.

(6) Represents costs incurred in connection with the refinancing in December 2010, including the premium paid to redeem our 7 ³/4% senior subordinated notes due 2014, the write off of debt issue costs and unamortized note premium and discount and settlement of the interest rate swap agreement and other expenses.

(7) Represents costs and expenses incurred by TD Group related to the secondary offering in May 2007.

(8) Represents the amount recognized for an earn-out payment pursuant to the terms of the retention agreement entered into in connection with the acquisition of substantially all of the assets of Skurka Engineering Company in December 2004.

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The following table sets forth a reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined:

	Fiscal Years Ended September 30,
	2011			2010			2009			2008			2007
	(in thousands)
Net Cash Provided by Operating Activities	$	260,578		$	197,304		$	197,112		$	189,635		$	112,436
Adjustments:
Changes in assets and liabilities, net of effects from acquisitions of businesses		(31,066	)		(4,971	)		1,897			(35,544	)		(10,602	)
Interest expense, net (1)		175,414			104,656			81,147			89,580			88,620
Income tax provision—current		130,109			85,490			79,300			66,141			47,196
Non-cash equity compensation(2)		(12,574	)		(6,704	)		(5,813	)		(4,035	)		(3,487	)
Excess tax benefit from exercise of stock options		23,411			17,459			9,278			18,756			23,627
Refinancing costs(3)		(72,454	)		—			—			—			—
EBITDA		473,418			393,234			362,921			324,533			257,790
Adjustments:
Inventory purchase accounting adjustments(4)		21,828			4,794			2,264			1,933			6,392
Acquisition integration costs(5)		11,821			4,171			3,426			393			2,037
Acquisition transaction-related expenses(6)		2,817			2,717			—			—			—
Non-cash compensation and deferred compensation costs(7)		12,568			6,693			6,079			6,218			5,482
Acquisition earnout adjustment(8)		(3,000	)		—			—			—			—
Refinancing costs(3)		72,454			—			—			—			—
Public offering costs(9)		—			—			—			—			1,691
Acquisition earnout costs(10)		—			—			—			—			850
Write-down of certain property held for sale		—			—			—			—			466
EBITDA from discontinued operations		(2,032	)		—			—			—			—
EBITDA As Defined	$	589,874		$	411,609		$	374,690		$	333,077		$	274,708

(1) Represents interest expense excluding the amortization of debt issue costs and note premium and discount.

(2) Represents the compensation expense recognized by TD Group under its stock plans.

(3) Represents costs incurred in connection with the refinancing in December 2010, including the premium paid to redeem our 7 ³/4% senior subordinated notes due 2014, the write off of debt issue costs and unamortized note premium and discount and settlement of the interest rate swap agreement and other expenses.

(4) Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

(5) Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

(6) Represents, for periods after October 1, 2009, transaction-related costs comprising deal fees; legal, financial and tax due diligence expenses; and valuation costs that are now required to be expensed as incurred.

(7) Represents the compensation expense recognized by TD Group under our stock option and our deferred compensation plans.

(8) Represents the reversal of a portion of the earn-out liability related to the Dukes Aerospace acquisition based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement.

(9) Represents costs and expenses incurred by TD Group related to the secondary offering in May 2007.

(10) Represents the amount recognized for an earn-out payment pursuant to the terms of the retention agreement entered into in connection with the acquisition of substantially all of the assets of Skurka Engineering Company in December 2004.

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion of our financial condition and results of operations should be read together with “Selected Financial Data” and TD Group’s consolidated financial statements and the related notes included elsewhere in this report. The following discussion may contain predictions, estimates and other forward-looking statements that involve a number of risks and uncertainties, including those discussed under the heading entitled “Risk Factors” included elsewhere in this report. These risks could cause our actual results to differ materially from any future performance suggested below.

Overview

We believe we are a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. Our business is well diversified due to the broad range of products we offer to our customers. Some of our more significant product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, engineered interior surfaces and lighting and control technology. Each of these product offerings is composed of many individual products that are typically customized to meet the needs of a particular aircraft platform or customer.

Long-term Sustainable Growth

For fiscal year 2011, we generated net sales of $1,206.0 million, gross profit of $661.2 million or 54.8% of sales, and net income of $172.1 million. We believe we have achieved steady, long-term growth in sales and improvements in operating performance since our formation in 1993 due to our competitive strengths and through execution of our value-driven operating strategy. More specifically, focusing our businesses on our value-driven operating strategy of obtaining profitable new business, carefully controlling the cost structure and pricing our highly engineered value-added products to fairly reflect the value we provide and the resources required to do so has historically resulted in improvements in gross profit and income from operations over the long term.

Our selective acquisition strategy has also contributed to the growth of our business. The integration of certain acquisitions into our existing businesses combined with implementing our proven operating strategy has historically resulted in improvements of the financial performance of the acquired business.

Our key competitive strengths and the elements of our business strategy are set forth in more detail below.

We believe our key competitive strengths include:

Large and Growing Installed Product Base with Aftermarket Revenue Stream. We provide components to a large and growing installed base of aircraft to which we supply aftermarket products. We estimate that our products are installed on approximately 70,000 commercial transport, regional transport, military and general aviation fixed wing turbine aircraft and rotary wing aircraft.

Diversified Revenue Base. We believe that our diversified revenue base reduces our dependence on any particular product, platform or market channel and has been a significant factor in maintaining our financial performance. Our products are installed on almost all of the major commercial aircraft platforms now in production. We expect to continue to develop new products for military and commercial applications.

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Significant Barriers to Entry. We believe that the niche nature of our markets, the industry’s stringent regulatory and certification requirements, the large number of products that we sell and the investments necessary to develop and certify products create barriers to entry for potential competitors.

Our business strategy is made up of two key elements: (1) a value-driven operating strategy focused around our three core value drivers and (2) a selective acquisition strategy.

Value-Driven Operating Strategy. Our three core value drivers are:

• Obtaining Profitable New Business. We attempt to obtain profitable new business by using our technical expertise, application skill and our detailed knowledge of our customer base and the individual niche markets in which we operate. We have regularly been successful in identifying and developing both aftermarket and OEM products to drive our growth.

• Improving Our Cost Structure. We are committed to maintaining and continuously improving our lean cost structure through detailed attention to the cost of each of the products that we offer and our organizational structure, with a focus on reducing the cost of each.

• Providing Highly Engineered Value-Added Products to Customers. We focus on the engineering, manufacturing and marketing of a broad range of highly engineered niche products that we believe provide value to our customers. We believe we have been consistently successful in communicating to our customers the value of our products. This has generally enabled us to price our products to fairly reflect the value we provide and the resources required to do so.

Selective Acquisition Strategy. We selectively pursue the acquisition of proprietary aerospace component businesses when we see an opportunity to create value through the application of our three core value-driven operating strategies. The aerospace industry, in particular, remains highly fragmented, with many of the companies in the industry being small private businesses or small non-core operations of larger businesses. We have significant experience among our management team in executing acquisitions and integrating acquired businesses into our company and culture. As of the date of this report, we have successfully acquired and integrated 34 businesses and/or product lines since our formation in 1993. Many of these acquisitions have been integrated into an existing TransDigm production facility, which enables a higher production capacity utilization, which in turn improves gross profit levels due to the ability to spread the fixed manufacturing overhead costs over higher production volume.

Public Offerings

On March 20, 2006 and May 25, 2007, certain stockholders of TD Group (including certain members of our management) sold an aggregate of 11.5 million and 12.6 million shares of TD Group’s common stock, respectively, in public offerings at prices of $21.00 and $35.25 per share. TD Group did not offer any shares of its common stock for sale in the public offerings and TD Group did not receive any of the proceeds from the sale of such shares by the selling stockholders. As a result of the initial public offering, TD Group’s common stock is publicly traded on the New York Stock Exchange under the ticker symbol “TDG.”

Certain Acquisitions and Divestitures

Schneller Holdings Acquisition

On August 31, 2011, TransDigm Inc. acquired all of the outstanding equity interests in Schneller Holdings LLC (“Schneller”) for approximately $288.5 million in cash, subject to adjustments based on the level of working capital as of the closing date of the acquisition. Schneller designs and manufactures proprietary, highly engineered laminates, thermoplastics, and non-textile flooring for use primarily on side walls, lavatories, galleys, bulkheads and cabin floors for commercial aircraft. These products fit well with TransDigm’s overall business direction. The Company is in the process of obtaining information to value certain tangible and intangible assets of Schneller, and therefore the consolidated financial statements at September 30, 2011 reflect a preliminary purchase price allocation for the business.

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Talley Actuation Acquisition

On December 31, 2010, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired the actuation business of Telair International Inc. (“Talley Actuation”), a wholly-owned subsidiary of Teleflex Incorporated, for approximately $93.6 million in cash, which includes a purchase price adjustment of $0.3 million received in the third quarter of fiscal 2011. Talley Actuation manufactures proprietary, highly engineered electro-mechanical products and other components for commercial and military aircraft. These products fit well with TransDigm’s overall business direction.

McKechnie Aerospace Holdings, Inc. Acquisition

On December 6, 2010, TransDigm Inc. acquired all of the outstanding stock of McKechnie Aerospace Holdings Inc. (“McKechnie Aerospace”), for approximately $1.27 billion in cash, which includes a purchase price adjustment of $0.3 million paid in the third quarter of fiscal 2011. McKechnie Aerospace, through its subsidiaries, is a leading global designer, producer and supplier of aerospace components, assemblies and subsystems for commercial aircraft, regional/business jets, military fixed wing and rotorcraft. Some of the businesses acquired as part of McKechnie Aerospace have since been divested (see below). The remaining products fit well with TransDigm’s overall business direction.

Semco Instruments Acquisition

On September 3, 2010, TransDigm Inc. acquired all of the outstanding capital stock of Semco Instruments, Inc. (“Semco”) for approximately $73.6 million in cash, which includes a purchase price adjustment of $3.0 million paid in the first quarter of fiscal 2011. Semco is a designer and manufacturer of proprietary, highly engineered components for all major turbo-prop, turbo-fan, and turbo-shaft engines, which are primarily used on helicopters, business jets and selected regional airplanes. These products fit well with TransDigm’s overall business direction.

Dukes Aerospace Acquisition

On December 2, 2009, Dukes Aerospace, Inc., a wholly owned subsidiary of TransDigm Inc., acquired substantially all of the aerospace-related assets of Dukes, Inc. and GST Industries, Inc. (collectively “Dukes Aerospace”) for approximately $95.5 million in cash, which includes a purchase price adjustment of $0.2 million received in the third quarter of fiscal 2011. Dukes Aerospace is a supplier of proprietary, highly engineered components primarily to the business jet, regional jet, and military aerospace markets, along with commercial and military helicopter markets. The products are comprised primarily of highly engineered valves and certain pumps, solenoids and related components. These products fit well with TransDigm’s overall business direction.

Woodward HRT Product Line Acquisition

On August 10, 2009, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired certain product line assets of Woodward HRT, Inc., a subsidiary of Woodward Governor Company (“Woodward HRT product line”) for approximately $48.7 million in cash, which includes a purchase price adjustment of $0.7 million paid in the second quarter of fiscal 2010. The product line comprises a range of highly engineered fuel and pneumatic valves and surge suppressors, the majority of which are used on military rotary and fixed wing aircraft, all of which fit well with TransDigm’s overall business direction. Woodward Governor had recently acquired this business as part of its acquisition of HR Textron, Inc.

Acme Aerospace Acquisition

On July 24, 2009, TransDigm Inc. acquired all of the outstanding capital stock of Acme Aerospace, Inc. (“Acme”) for approximately $40.9 million in cash, which includes a purchase price adjustment of $0.2 million paid in the first quarter of fiscal 2010. Acme is a designer and manufacturer of proprietary, highly engineered components to the commercial aerospace industry, comprising primarily fibrous nickel cadmium main ship batteries, battery chargers, battery back-up systems and power conversion equipment. These products fit well with TransDigm’s overall business direction.

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Aircraft Parts Corporation Acquisition

On December 16, 2008, TransDigm Inc. acquired all of the outstanding capital stock of Aircraft Parts Corporation (“APC”) for approximately $66.9 million in cash, net of a purchase price adjustment of $0.7 million received in the first quarter of fiscal 2010. APC is a designer and manufacturer of starter generators, generator control units and related components for turbine engines, all of which fit well with TransDigm’s overall business direction.

Aero Quality Sales Divestiture

On April 7, 2011, the Company completed the divestiture of Aero Quality Sales (“AQS”) to Satair A/S for approximately $31.8 million in cash, which includes a $1.8 million working capital adjustment received in the third quarter of fiscal 2011. AQS, which was acquired as part of the McKechnie Aerospace acquisition, is a distributor and service center of aircraft batteries and battery support equipment. The Company’s Chairman and Chief Executive Officer, W. Nicholas Howley was a director of Satair A/S from 2006 through October 2011. Mr. Howley discussed his relationship to Satair A/S to the Company’s board of directors and abstained from the related vote.

Fastener Business Divestiture

On March 9, 2011, the Company completed the divestiture of its fastener business for approximately $239.6 million in cash, subject to adjustments based on the level of working capital as of the closing date. This business, which was acquired as part of the McKechnie Aerospace acquisition, is made up of Valley-Todeco, Inc. and Linread Ltd. The business designs and manufactures fasteners, fastening systems and bearings for commercial, military and general aviation aircraft.

Recent Development

Agreement to Acquire Harco Laboratories

On November 8, 2011, the Company entered into a definitive agreement to acquire Harco Laboratories, Incorporated (“Harco”) for approximately $84 million in cash. The acquisition, which is subject to review under the Hart-Scott-Rodino Act and other customary closing conditions, is expected to close during the first quarter of fiscal 2012. Harco designs and manufactures highly engineered thermocouples, sensors, engine cable assemblies and related products primarily for major commercial aircraft.

EBITDA and EBITDA As Defined

The following table sets forth a reconciliation of net income to EBITDA and EBITDA As Defined:

	Fiscal Years Ended September 30,
	2011			2010
	(in thousands)
Net income	$	172,134		$	163,445
Less income from discontinued operations		19,909			—
Income from continuing operations		152,225		$	163,445
Adjustments:
Depreciation and amortization expense		60,460			30,165
Interest expense, net		185,256			112,234
Income tax provision		77,200			87,390
EBITDA, excluding discontinued operations(1)		475,141			393,234
Adjustments:
Inventory purchase accounting adjustments(2)		18,073			4,794
Acquisition integration costs(3)		11,821			4,171
Acquisition transaction-related expenses(4)		2,817			2,717
Non-cash compensation costs(5)		12,568			6,693
Acquisition earn-out adjustment(6)		(3,000	)		—
Refinancing costs(7)		72,454			—
EBITDA As Defined(1)	$	589,874		$	411,609

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(1) EBITDA represents earnings from continuing operations before interest, taxes, depreciation and amortization. EBITDA As Defined represents EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliation of net income to EBITDA and EBITDA As Defined. See “Non-GAAP Financial Measures” for additional information and limitations regarding these non-GAAP financial measures.

(2) Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

(3) Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

(4) Represents transaction-related costs comprising deal fees; legal, financial and tax due diligence expenses; and valuation costs that are required to be expensed as incurred.

(5) Represents the compensation expense recognized by TD Group under our stock option plans.

(6) Represents the reversal of a portion of the earn-out liability related to the Dukes Aerospace acquisition based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement.

(7) Represents costs incurred in connection with the refinancing in December 2010, including the premium paid to redeem our 7 ³/4% senior subordinated notes due 2014, the write off of debt issue costs and unamortized note premium and discount and settlement of the interest rate swap agreement and other expenses.

The following table sets forth a reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined:

	Fiscal Years Ended September 30,
	2011			2010
	(in thousands)
Net Cash Provided by Operating Activities	$	260,578		$	197,304
Adjustments:
Changes in assets and liabilities, net of effects from acquisitions of businesses		(31,066	)		(4,971	)
Interest expense, net(1)		175,414			104,656
Income tax provision—current		130,109			85,490
Non-cash equity compensation(2)		(12,574	)		(6,704	)
Excess tax benefit from exercise of stock options		23,411			17,459
Refinancing costs(3)		(72,454	)		—
EBITDA(4)		473,418			393,234
Adjustments:
Inventory purchase accounting adjustments(5)		21,828			4,794
Acquisition integration costs(6)		11,821			4,171
Acquisition transaction-related expenses(7)		2,817			2,717
Stock option expense(8)		12,568			6,693
Acquisition earnout adjustment(9)		(3,000	)		—
Refinancing costs(3)		72,454			—
EBITDA from discontinued operations		(2,032	)		—
EBITDA As Defined(4)	$	589,874		$	411,609

(1) Represents interest expense excluding the amortization of debt issue costs and note premium and discount.

(2) Represents the compensation expense recognized by TD Group under its stock plans.

(3) Represents costs incurred in connection with the refinancing in December 2010, including the premium paid to redeem our 7 ³/4% senior subordinated notes due 2014, the write off of debt issue costs and unamortized note premium and discount and settlement of the interest rate swap agreement and other expenses.

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(4) EBITDA represents earnings before interest, taxes, depreciation and amortization. EBITDA As Defined represents EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined. See “Non-GAAP Financial Measures” for additional information and limitations regarding these non-GAAP financial measures.

(5) Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

(6) Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

(7) Represents transaction-related costs comprising deal fees; legal, financial and tax due diligence expenses; and valuation costs that are required to be expensed as incurred.

(8) Represents the compensation expense recognized by TD Group under our stock option plans.

(9) Represents the reversal of a portion of the earn-out liability related to the Dukes Aerospace acquisition based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement.

Trend Information

We predominantly serve customers in the commercial, regional, business jet and general aviation aftermarket, which accounts for approximately 40% of total sales; the commercial aerospace OEM market, comprising large commercial transport manufacturers and regional and business jet manufacturers, which accounts for approximately 28% of total sales; and the defense market, which accounts for approximately 29% of total sales. Non-aerospace sales comprise approximately 3% of our total sales.

The commercial aerospace industry, including the aftermarket and OEM market, is impacted by the health of the global economy and geo-political events around the world. The commercial aerospace industry had shown strength with increases in revenue passenger miles, or RPMs, between 2003 and 2008, as well as increases in OEM production and backlog, however, in 2009, the global economic downturn negatively impacted the commercial aerospace industry causing RPMs to decline slightly. This market sector began to rebound in 2010 and continued to grow in 2011 with increases in RPMs, as well as the growth in the large commercial OEM sector (aircraft with 100 or more seats) with order announcements by The Boeing Company and Airbus S.A.S. leading to planned increases in production. The 2012 leading indicators and industry consensus suggest the continuation of current trends in the commercial transport market sector supported by continued RPM growth, a modest acceleration of capacity growth and increases in production at the OEM level.

The defense aerospace market is dependent on government budget constraints, the timing of orders and the extent of global conflicts. It is not necessarily affected by general economic conditions that affect the commercial aerospace industry.

Our presence in both the commercial aerospace and military sectors of the aerospace industry may mitigate the impact on our business of any specific industry risk. We service a diversified customer base in the commercial and military aerospace industry, and we provide components to a diverse installed base of aircraft, which mitigates our exposure to any individual airframe platform. At times, declines in sales in one channel have been offset by increased sales in another. However, due to differences between the profitability of our products sold to OEM and aftermarket customers, variation in product mix can cause variation in gross margin.

There are many short-term factors (including inventory corrections, unannounced changes in order patterns, strikes and mergers and acquisitions) that can cause short-term disruptions in our quarterly shipment patterns as compared to previous quarters and the same periods in prior years. To normalize for short-term fluctuations, we tend to look at our performance over several quarters or years of activity rather than discrete short-term periods. As such, it can be difficult to determine longer-term trends in our business based on quarterly comparisons.

There are also fluctuations in OEM and aftermarket ordering and delivery requests from quarter-to-quarter, as well as variations in product mix from quarter-to-quarter, that may cause positive or negative variations in

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gross profit margins since commercial aftermarket sales have historically produced a higher gross margin than sales to commercial OEMs. Again, in many instances these are timing events between quarters and must be balanced with macro aerospace industry indicators.

Commercial Aftermarket

The key growth factors in the commercial aftermarket include worldwide RPMs and the size and activity level of the worldwide fleet of aircraft. Although RPMs increased annually between 2003 and 2008, 2009 had negative growth as a result of reductions in air traffic and capacity due to the slowdown in the global economy. Worldwide RPMs returned to positive growth in 2010 and 2011 and current industry consensus indicates that RPM growth will continue in 2012.

Commercial OEM Market

Conditions in the commercial transport market sector improved during 2011. We are now expecting increased sales in the large commercial OEM sector (aircraft with 100 or more seats) driven by order announcements by The Boeing Company and Airbus S.A.S. Furthermore, the business jet OEM market significantly declined between 2008 and 2010. However, the business jet OEM market has started to recover in 2011 and is expected to continue to show positive growth in 2012. This market has been negatively impacted by the slowdown in economic growth, corporate profits, commodity prices and stock market returns across the world.

Defense

In recent years, defense spending has reached historic highs, due in part to the military engagements in Afghanistan and Iraq and the war on terrorism. Our military business fluctuates from year to year, and is dependent, to a degree, on government budget constraints, the timing of orders and the extent of global conflicts. We anticipate that military related sales of our types of products could be flat to modestly down in future years over the current high levels.

Critical Accounting Policies

Our consolidated financial statements have been prepared in conformity with GAAP, which often requires the judgment of management in the selection and application of certain accounting principles and methods. Management believes that the quality and reasonableness of our most critical policies enable the fair presentation of our financial position and results of operations. However, investors are cautioned that the sensitivity of financial statements to these methods, assumptions and estimates could create materially different results under different conditions or using different assumptions.

We have identified the following as the most critical accounting policies upon which our financial status depends. These critical policies were determined by considering accounting policies that involve the most complex or subjective decisions or assessments. Our most critical accounting policies are as follows:

Revenue Recognition and Related Allowances: Revenue is recognized from the sale of products when title and risk of loss passes to the customer, which is generally at the time of shipment. Substantially all sales are made pursuant to firm, fixed-price purchase orders received from customers. Collectability of amounts recorded as revenue is reasonably assured at the time of sale. Provisions for returns, uncollectible accounts and the cost of repairs under contract warranty provisions are provided for in the same period as the related revenues are recorded and are principally based on historical results modified, as appropriate, by the most current information available. We have a history of making reasonably dependable estimates of such allowances; however, due to uncertainties inherent in the estimation process, it is possible that actual results may vary from the estimates and the differences could be material.

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Management estimates the allowance for doubtful accounts based on the aging of the accounts receivable and customer creditworthiness. The allowance also incorporates a provision for the estimated impact of disputes with customers. Management’s estimate of the allowance amounts that are necessary includes amounts for specifically identified credit losses and a general amount for estimated credit losses based on historical information. The determination of the amount of the allowance for doubtful accounts is subject to significant levels of judgment and estimation by management. Depending on the resolution of potential credit and other collection issues, or if the financial condition of any of the Company’s customers were to deteriorate and their ability to make required payments were to become impaired, increases in these allowances may be required. Historically, changes in estimates in the allowance for doubtful accounts have not been significant.

The Company provides limited warranties in connection with the sale of its products. The warranty period for products sold, which varies among the Company’s operations, is typically less than two years but can be in the range from 90 days to six years. In addition, certain contracts with distributors contain right of return provisions. The Company accrues for estimated returns and warranty claims based on knowledge of product performance issues and based on excess inventories provided by its customers and industry sources. The Company also provides a general amount based on historical trends. To the extent total warranty claims differ from estimates, adjustments may be necessary. Historically, actual product returns and warranty claims have not differed materially from the estimates originally established.

Inventories: Inventories are stated at the lower of cost or market. Cost of inventories is determined by the average cost and the first-in, first-out (FIFO) methods for all locations except CEF Industries, LLC, which determines the cost of inventories using the last-in, first-out (LIFO) method. Because the Company sells products that are installed on airframes that can be in-service for 30 or more years, it must keep a supply of such products on hand while the airframes are in use. Where management estimated that the current market value was below cost or determined that future demand was lower than current inventory levels, based on historical experience, current and projected market demand, current and projected volume trends and other relevant current and projected factors associated with the current economic conditions, a reduction in inventory cost to estimated net realizable value was made by recording a provision included in cost of sales. Although management believes that the Company’s estimates of excess and obsolete inventory are reasonable, actual results may differ materially from the estimates and additional provisions may be required in the future. In addition, in accordance with industry practice, all inventories are classified as current assets as all inventories are available and necessary to support current sales, even though a portion of the inventories may not be sold within one year. Historically, changes in estimates in the net realizable value of inventories have not been significant.

Intangible Assets: Mergers and acquisitions are accounted for using the acquisition method and have resulted in significant amounts of identifiable intangible assets and goodwill. Fair value adjustments to the Company’s assets and liabilities are recognized and the results of operations of the acquired business are included in our consolidated financial statements from the effective date of the merger or acquisition. We generally use third-party appraisals to assist us in determining the estimated fair value of the intangible assets.

Intangible assets other than goodwill are recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the intangible asset can be sold, transferred, licensed or exchanged, regardless of the Company’s intent to do so. Goodwill and identifiable intangible assets are recorded at their estimated fair value on the date of acquisition and are reviewed at least annually for impairment based on cash flow projections and fair value estimates.

GAAP requires that the annual, and any interim, impairment assessment be performed at the reporting unit level. The reporting unit level is the operating subsidiary level for the Company. Substantially all goodwill was determined and recognized for each operating subsidiary pursuant to the accounting for the merger or acquisition as of the date of each transaction, and therefore the allocation of goodwill among reporting units was immaterial for purposes of the impairment assessment. With respect to acquisitions integrated into an existing operating subsidiary, any related goodwill is combined with goodwill of the operating subsidiary.

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At the time of goodwill impairment testing, management determines the estimated fair value through the use of a discounted cash flow valuation model incorporating discount rates commensurate with the risks involved for each reporting unit. If the calculated estimated fair value is less than the current carrying value, impairment of goodwill of the reporting unit may exist. The use of a discounted cash flow valuation model to determine estimated fair value is common practice in impairment testing. The key assumptions used in the discounted cash flow valuation model for impairment testing includes discount rates, growth rates, cash flow projections and terminal value rates. Discount rates are set by using the Weighted Average Cost of Capital (“WACC”) methodology. The WACC methodology considers market and industry data as well as Company specific risk factors for each reporting unit in determining the appropriate discount rates to be used. The discount rate utilized for each reporting unit is indicative of the return an investor would expect to receive for investing in such a business.

Operational management, considering industry and company-specific historical and projected data, develops growth rates, sales projections and cash flow projections for each reporting unit. Terminal value rate determination follows common methodology of capturing the present value of perpetual cash flow estimates beyond the last projected period assuming a constant WACC and low long-term growth rates. As an indicator that each reporting unit has been valued appropriately through the use of the discounted cash flow valuation model, the aggregate of all reporting units estimated fair value is reconciled to the total market capitalization of the Company.

The Company had 17 reporting units with goodwill as of the first day of the fourth quarter of fiscal 2011, the date of the last annual impairment test. The estimated fair values of each of the reporting units was substantially in excess of their respective carrying values (by more than 15 percent), and therefore no goodwill impairment was recorded. The Company performed a sensitivity analysis on the discount rate, which is a significant assumption in the calculation of fair values. With a one percentage point increase in the discount rate, the reporting units would continue to have fair values in excess of their respective carrying values.

Management tests indefinite-lived intangible assets for impairment at the asset level, as determined by appropriate asset valuation at the time of acquisition. The impairment test for indefinite-lived intangible assets consists of a comparison between the estimated fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their estimated fair values, an impairment loss will be recognized in an amount equal to the difference. Management utilizes the royalty savings valuation method to determine the estimated fair value for each indefinite-lived intangible asset. In this method, management estimates the royalty savings arising from the ownership of the intangible asset. The key assumptions used in estimating the royalty savings for impairment testing include discount rates, royalty rates, growth rates, sales projections and terminal value rates. Discount rates used are similar to the rates developed by the WACC methodology considering any differences in company-specific risk factors between reporting units and the indefinite-lived intangible assets. Royalty rates are established by management with the advice of valuation experts and periodically substantiated by valuation experts. Operational management, considering industry and company-specific historical and projected data, develops growth rates and sales projections for each significant intangible asset. Terminal value rate determination follows common methodology of capturing the present value of perpetual sales estimates beyond the last projected period assuming a constant WACC and low long-term growth rates.

The discounted cash flow and royalty savings valuation methodologies require management to make certain assumptions based upon information available at the time the valuations are performed. Actual results could differ from these assumptions. Management believes the assumptions used are reflective of what a market participant would have used in calculating fair value considering the current economic conditions.

Stock Options: The Company accounts for the cost of its stock options in accordance with GAAP, which requires the measurement of compensation expense under the stock option plan to be based on the estimated fair value of the awards under the plan on the grant dates and amortizes the expense over the vesting periods of the options. The Company estimates the fair value of all share-based payments using the Black-Scholes-Merton option pricing model which requires management to make certain assumptions. Management continuously reviews the

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following assumptions: risk-free interest rates, expected life of options, expected volatility of stock and expected dividend yield of stock. An increase or decrease in the assumptions or economic events outside management’s control could have an impact on the Company’s results of operations.

Environmental Matters: The Company is involved with environmental investigation and remediation activities at some of its currently and formerly owned sites and at third-party sites. The Company accrues for environmental-related activities for which commitments or clean-up plans have been developed and for which costs can be reasonably estimated based on industry standards and professional judgment. All accrued amounts were recorded on an undiscounted basis. Environmental-related expenses include costs of investigation and remediation and fees paid to outside engineering, actuarial, consulting and law firms. Due to uncertainties surrounding environmental investigations and remediation activities, the Company’s ultimate liability may result in costs that are significantly higher than currently accrued.

Income Taxes: The Company estimates income taxes in each jurisdiction in which it operates. This involves estimating taxable earnings, specific taxable and deductible items, the likelihood of generating sufficient future taxable income to utilize deferred tax assets and possible exposures related to future tax audits. To the extent these estimates change, adjustments to deferred and accrued income taxes are made in the period in which the changes occur. Historically, such adjustments have not been significant.

Results of Operations

The following table sets forth, for the periods indicated, certain operating data of the Company, including presentation of the amounts as a percentage of net sales (amounts in thousands):

	Fiscal Years Ended September 30,
	2011		2011 % of Sales			2010		2010 % of Sales			2009		2009 % of Sales
Net sales	$	1,206,021		100.0	%	$	827,654		100.0	%	$	761,552		100.0	%
Cost of sales		544,836		45.2			354,588		42.8			332,206		43.6
Selling and administrative expenses		133,711		11.1			94,918		11.5			80,018		10.5
Amortization of intangible assets		40,339		3.3			15,079		1.8			13,928		1.8
Income from operations		487,135		40.4			363,069		43.9			335,400		44.1
Refinancing costs		72,454		6.0			—		—			—		—
Interest expense, net		185,256		15.4			112,234		13.6			84,398		11.1
Income tax provision		77,200		6.4			87,390		10.6			88,100		11.6
Income from continuing operations		152,225		12.6			163,445		19.7	%		162,902		21.4	%
Income from discontinued operations, net of tax		19,909		1.7			—		—			—		—
Net income	$	172,134		14.3	%	$	163,445		19.7	%	$	162,902		21.4	%

Fiscal year ended September 30, 2011 compared with fiscal year ended September 30, 2010

Net Sales. Net sales increased by $378.4 million, or 45.7%, to $1,206.0 million for fiscal 2011 from $827.7 million for fiscal 2010. Sales of $276.2 million, or 33.4%, resulted from the acquisitions of Dukes Aerospace and Semco Instruments in fiscal 2010 and McKechnie Aerospace, Talley Actuation and Schneller Holdings in fiscal 2011. Organic sales increased by $102.2 million or 12.3% from the prior year.

The organic sales growth was primarily due to an increase of $22.2 million, or a 12.0% increase in commercial OEM sales, and an increase of $73.7 million, or a 22.1% increase in commercial aftermarket sales, resulting primarily from improving market demand for commercial aftermarket products. Defense sales increased by $1.6 million for fiscal 2011 compared to fiscal 2010.

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Cost of Sales and Gross Profit. Cost of sales increased by $190.2 million, or 53.7%, to $544.8 million for fiscal 2011 from $354.6 million for fiscal 2010. The increase in the dollar amount of cost of sales was primarily due to increased volume associated with the net sales from acquisitions and the organic sales growth discussed above, along with an increase in inventory purchase accounting adjustments and acquisition integration costs.

Gross profit as a percentage of sales decreased to 54.8% for fiscal 2011 from 57.2% for fiscal 2010. The dollar amount of gross profit increased by $188.1 million, or 39.8%, to $661.2 million for fiscal 2011 from $473.1 million for fiscal 2010. The increase in the amount of gross profit was primarily due to the following items:

• Sales of $276.2 million from the acquisitions indicated above contributed gross profit of approximately $110 million for fiscal 2011, which includes the acquisition-related costs (inventory purchase accounting adjustments and acquisition integration costs) incurred in connection with those acquisitions amounting to $26.2 million. These acquisitions diluted gross profit as a percentage of sales for fiscal 2011 by approximately 4 percentage points.

• Organic sales growth described above, favorable product mix and favorable product pricing on our proprietary products resulted in increased gross profit of approximately $78 million for fiscal 2011.

Selling and Administrative Expenses. Selling and administrative expenses increased by $38.8 million to $133.7 million, or 11.1% of sales, for fiscal 2011 from $94.9 million, or 11.5% of sales, for the fiscal 2010. The increase is primarily due to higher selling and administrative expenses relating to recent acquisitions of approximately $28 million and non-cash stock compensation expense of approximately $5 million.

Amortization of Intangibles. Amortization of intangibles increased to $40.3 million for fiscal 2011 from $15.1 million for fiscal 2010. The net increase of $25.2 million was primarily due to amortization expense related to the additional identifiable intangible assets recognized in connection with acquisitions during the last twelve months.

Refinancing Costs. Refinancing costs were recorded as a result of the refinancing of TransDigm’s entire debt structure in December 2010. The charge of $72.5 million consisted of the premium of $41.9 million paid to redeem our 7 ³/4% senior subordinated notes, the write-off of debt issue costs and unamortized note premium and discount of $25.7 million, and the settlement of the interest rate swap agreement and other expenses of $4.9 million.

Interest Expense-net. Interest expense increased $73.0 million, or 65.1%, to $185.3 million for fiscal 2011 from $112.2 million for fiscal 2010. The net increase in interest expense-net was primarily due to an increase in the weighted average level of outstanding borrowings, which was approximately $2.90 billion for fiscal 2011 and approximately $1.78 billion for fiscal 2010. The increase in borrowings was due to the debt refinancing transactions and the acquisition financing related to McKechnie Aerospace which occurred in December 2010. The weighted average interest rate on total borrowings outstanding at September 30, 2011 was approximately 5.9%.

Income Taxes. Income tax expense as a percentage of income before income taxes was approximately 33.6% for fiscal 2011 compared to 34.8% for fiscal 2010. The decrease in the effective tax rate was primarily due to non-recurring adjustments in estimated deferred state obligations and an increase in research and development tax credits.

Income from Discontinued Operations. Income from discontinued operations comprises the net loss from discontinued operations through the dates of sale of the fastener business and AQS of $2.1 million and the after-tax net gain on sales of $22.0 million recorded during fiscal 2011.

Net Income. Net income increased $8.7 million, or 5.3%, to $172.1 million for fiscal 2011 compared to net income of $163.4 million for fiscal 2010, primarily as a result of the factors referred to above.

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Earnings per Share. The basic and diluted earnings per share were $3.17 for fiscal 2011 and $2.52 per share for fiscal 2010. For fiscal 2011, basic and diluted earnings per share from continuing operations were $2.80 and basic and diluted earnings per share from discontinued operations were $0.37. Net income for fiscal 2011 of $172.1 million was decreased by an allocation of dividends to participating securities of $2.8 million resulting in net income available to shareholders of $169.3 million. Due to the special cash dividend declared and paid during fiscal 2010, the net income for fiscal 2010 of $163.4 million was reduced by an allocation of dividends to participating securities of $30.3 million resulting in net income applicable to common shareholders of $133.1 million.

Fiscal year ended September 30, 2010 compared with fiscal year ended September 30, 2009

Net Sales. Net sales increased by $66.1 million, or 8.7%, to $827.7 million for fiscal 2010 from $761.5 million for fiscal 2009. Sales of $73.8 million resulted from the acquisitions of Aircraft Parts Corporation, Acme and the Woodward HRT product line in fiscal 2009 as well as the recent acquisitions of Dukes Aerospace and Semco in fiscal 2010.

Sales excluding acquisitions declined by $7.6 million, or 1.0%, from the prior year. The decline in organic sales was primarily due to a decrease of $18.7 million, or a 9.9% decrease in commercial OEM sales resulting primarily from the business jet OEM’s significant production rate reductions and related inventory reductions resulting from the impact of the global economic conditions. Partially offsetting the decline in organic commercial OEM sales was (i) an increase of $6.2 million in commercial aftermarket sales due to the apparent beginning of a long awaited upturn in global air traffic; and (ii) an increase of $2.7 million in defense sales primarily due to increased demand for OEM products across most of our product lines.

Cost of Sales and Gross Profit. Cost of sales increased by $22.4 million, or 6.7%, to $354.6 million for fiscal 2010 from $332.2 million for fiscal 2009. The increase in the dollar amount of cost of sales was primarily due to increased volume associated with the higher net sales discussed above. In addition, the increase was partially attributable to higher costs incurred to integrate acquired businesses into TD Group’s operations and purchase accounting adjustments to inventory that were charged to cost of sales of $3.3 million.

Gross profit as a percentage of sales increased to 57.2% for fiscal 2010 from 56.4% for fiscal 2009. The dollar amount of gross profit increased by $43.7 million, or 10.2%, to $473.1 million for fiscal year 2010 from $429.3 million for fiscal 2009. The increase in the amount of gross profit was primarily due to the following items:

• Sales of $73.8 million from the acquisitions indicated above contributed gross profit of approximately $26 million in fiscal 2010, which includes the acquisition-related costs (inventory purchase accounting adjustments and acquisition integration costs) incurred in connection with those acquisitions amounting to $9.0 million. These acquisitions diluted gross profit as a percentage of sales for fiscal 2010 by approximately 2 percentage points.

• Favorable product mix, favorable product pricing on our proprietary products and cost reduction efforts partially offset by the negative impact of fixed overhead costs spread over lower production volume (excluding acquisitions). The net impact of these items resulted in increased gross profit of approximately $18 million in fiscal 2010 despite the decline in organic sales of $7.6 million discussed above.

Selling and Administrative Expenses. Selling and administrative expenses increased by $14.9 million or 18.6%, to $94.9 million, 11.5% of net sales, for fiscal 2010 from $80.0 million, or 10.5% of net sales, for fiscal 2009. This increase was primarily due to higher selling and administrative expenses relating to recent acquisitions of approximately $6.4 million, transaction-related expenses incurred in connection with the acquisition of Dukes Aerospace and Semco Instruments of approximately $2.7 million, higher research and development expenses primarily relating to Airbus A350 and A380 platforms more than offsetting declines in expenses on the Boeing 787, new business development expenses and higher professional fees.

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Amortization of Intangibles. Amortization of intangibles increased to $15.1 million for fiscal 2010 from $13.9 million for fiscal 2009. The net increase of $1.2 million was primarily due to amortization expense related to the additional identifiable intangible assets recognized in connection with acquisitions during the last twelve months partially offset by the order backlog becoming fully amortized in fiscal 2009 relating to prior acquisitions.

Income from Operations. Operating income increased by $27.7 million, or 8.2%, to $363.1 million for fiscal 2010 from $335.4 million for fiscal 2009, primarily due to higher sales and other factors described above.

Interest Expense-Net. Interest expense-net increased $27.8 million, or 33.0%, to $112.2 million for fiscal 2010 from $84.4 million for fiscal 2009, comprising an increase in interest expense of $26.7 million and a decrease in interest income of $1.1 million. Interest expense increased primarily due to interest expense of approximately $37.3 million attributable to the $425 million of 7 3/4% senior subordinated notes due 2014 issued in October 2009. Partially offsetting the increase was lower interest rates on the Company’s existing floating-rate borrowings under its senior secured credit facility. The Company’s weighted average level of outstanding borrowings was approximately $1.78 billion for fiscal 2010 and approximately $1.36 billion for fiscal 2009. The average interest rate on total debt was approximately 6.0% for fiscal 2010 and fiscal 2009. Interest income was lower primarily due to lower interest rates on our invested cash balances.

Income Taxes. Income tax expense as a percentage of income before income taxes was approximately 34.8% for fiscal 2010 compared to 35.1% for fiscal 2009. The decrease in the effective tax rate was primarily due to reductions in estimated state tax obligations.

Net Income. Net income increased $0.5 million, or 0.3%, to $163.4 million for fiscal 2010 compared to $162.9 million for fiscal 2009, primarily as a result of the factors referred to above.

Earnings per Share. The basic and diluted earnings per share, calculated under the two-class method, was $2.52 per share for fiscal 2010 and $3.10 per share for fiscal 2009. Due to the special cash dividend declared and paid during the first quarter of fiscal 2010, the net income for fiscal 2010 of $163.4 million was reduced by an allocation of dividends to participating securities of $30.3 million (approximately $0.57 per share) resulting in a net income applicable to common stockholders of $133.1 million.

Backlog

As of September 30, 2011, the Company estimated its sales order backlog at $737 million compared to an estimated sales order backlog of $467 million as of September 30, 2010. The increase in backlog is primarily due to the acquisitions of McKechnie Aerospace, Talley Actuation and Schneller Holdings discussed above, totaling approximately $207 million. The majority of the purchase orders outstanding as of September 30, 2011 are scheduled for delivery within the next twelve months. Purchase orders may be subject to cancellation or deferral by the customer prior to shipment. The level of unfilled purchase orders at any given date during the year will be materially affected by the timing of the Company’s receipt of purchase orders and the speed with which those orders are filled. Accordingly, the Company’s backlog as of September 30, 2011 may not necessarily represent the actual amount of shipments or sales for any future period.

Foreign Operations

Although we manufacture substantially all of our products in the United States, we manufacture some products in Belgium, Malaysia and Mexico. We sell our products in the United States, as well as in foreign countries. A number of risks inherent in international operations could have a material adverse effect on our results of operations, including currency fluctuations, difficulties in staffing and managing multi-national operations, general economic and political uncertainties and potential for social unrest in countries in which we operate, limitations on our ability to enforce legal rights and remedies, restrictions on the repatriation of funds, change in trade policies, tariff regulation, difficulties in obtaining export and import licenses and the risk of government financed competition.

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Our direct sales to foreign customers were approximately $305.5 million, $170.6 million, and $150.4 million for fiscal years 2011, 2010 and 2009, respectively. Sales to foreign customers are subject to numerous additional risks, including the impact of foreign government regulations, political uncertainties and differences in business practices. There can be no assurance that foreign governments will not adopt regulations or take other actions that would have a direct or indirect adverse impact on the business or market opportunities of the Company within such governments’ countries. Furthermore, there can be no assurance that the political, cultural and economic climate outside the United States will be favorable to our operations and growth strategy.

Inflation

Many of the Company’s raw materials and operating expenses are sensitive to the effects of inflation, which could result in changing operating costs. The effects of inflation on the Company’s businesses during the fiscal years 2011, 2010 and 2009 were not significant.

Liquidity and Capital Resources

We have historically maintained a capital structure comprising a mix of equity and debt financing. We vary our leverage both to optimize our equity return and to pursue acquisitions. We expect to meet our current debt obligations as they come due through internally generated funds from current levels of operations and/or through refinancing in the debt or equity markets prior to the maturity dates of our debt.

We continually evaluate our debt facilities to assess whether they most efficiently and effectively meet the current and future needs of our business. The Company evaluates from time to time the appropriateness of its current leverage, taking into consideration the Company’s debt holders, equity holders, credit ratings, acquisition opportunities and other factors. The Company’s debt leverage ratio, which is computed as total debt divided by EBITDA As Defined for the applicable twelve-month period, has varied widely during the Company’s history, ranging from approximately 3.5 to 6.5. Our debt leverage ratio for the fiscal year ended September 30, 2011 was approximately 5.3.

The Company regularly engages in discussions with respect to potential acquisitions and investments. However, there can be no assurance that the Company will be able to consummate an agreement with respect to any future acquisition. The Company’s acquisition strategy may require substantial capital, and no assurance can be given that the Company will be able to raise any necessary funds on acceptable terms or at all. If the Company incurs additional debt to finance acquisitions, total interest expense will increase.

If the Company has excess cash, it may consider methods by which it can provide cash to its debt or equity holders through a dividend, prepayment of indebtedness, repurchase of stock, repurchase of debt or other means. Whether the Company undertakes additional stock repurchases or other aforementioned activities will depend on prevailing market conditions, the Company’s liquidity requirements, contractual restrictions and other factors. The amounts involved may be material. In addition, the Company may issue additional debt if prevailing market conditions are favorable to doing so.

The Company’s ability to make scheduled interest payments on, or to refinance, the Company’s indebtedness, or to fund non-acquisition related capital expenditures and research and development efforts, will depend on the Company’s ability to generate cash in the future. This is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond its control. Based on its current levels of operations and absent any disruptive events, management believes that internally generated funds and borrowings available under our revolving loan facility should provide sufficient resources to finance its operations, non-acquisition related capital expenditures, research and development efforts and long-term indebtedness obligations through at least fiscal 2012. There can be no assurance, however, that the Company’s business will generate sufficient cash flow from operations or that future borrowings will be available to the Company under the senior secured credit facility in an amount sufficient to enable it to pay its indebtedness or to fund its other

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liquidity needs. The Company may need to refinance all or a portion of its indebtedness on or before maturity. Also, to the extent the Company accelerates its growth plans, consummates acquisitions or has lower than anticipated sales or increases in expenses, the Company may also need to raise additional capital. In particular, increased working capital needs occur whenever the Company consummates acquisitions or experiences strong incremental demand. There can be no assurance that the Company will be able to raise additional capital on commercially reasonable terms or at all.

The Company has not, at this time, determined to change the nature of its debt facilities. However, in the future, the Company may increase its borrowings in connection with acquisitions, if cash flow from operations becomes insufficient to fund current operations or for other short-term cash needs or for stock repurchases or dividends. Our future leverage will also be impacted by the then current conditions of the credit markets.

Operating Activities. The Company generated $260.6 million of cash from operating activities during fiscal 2011 compared to $197.3 million during fiscal 2010. The net increase of $63.3 million was due primarily due to an increase in income from operations offset by higher interest payments and associated refinancing costs in connection with the Company’s debt refinancing transactions during fiscal 2011.

The Company generated $197.3 million of cash from operating activities on net income of $163.4 million during fiscal 2010 compared to $197.1 million of cash from operating activities generated on net income of $162.9 million during fiscal 2009.

Investing Activities. Cash used in investing activities was $1,397.0 million during fiscal 2011, consisting primarily of the acquisitions of McKechnie Aerospace, Talley Actuation and Schneller Holdings for a total of $1,650.4 million and capital expenditures of $18.0 million offset by the cash proceeds on the sale of the fastener business and AQS of $271.4 million.

Net cash used in investing activities was $176.6 million during fiscal 2010 consisting primarily of the acquisitions of Dukes Aerospace and Semco for a total of $166.6 million and capital expenditures of $12.9 million. Net cash used in investing activities for fiscal 2010 also includes cash proceeds of $2.9 million from the sale of real estate no longer utilized.

Net cash used in investing activities was $168.4 million during fiscal 2009 consisting primarily of the acquisitions of the businesses of Aircraft Parts Corporation, Acme and Woodward HRT product line for a total of $155.2 million and capital expenditures of $13.2 million.

Financing Activities. Cash provided by financing activities during fiscal 2011 was $1,278.5 million, which comprised $1,260.3 million of net proceeds from the refinancing of our entire debt structure, $11.6 million repayment on our New Senior Secured Credit Facility, $2.8 million of dividends and dividend equivalent payments, and $32.6 million of cash for tax benefits related to share-based payment arrangements and from the exercise of stock options.

Net cash provided by financing activities during fiscal 2010 was $23.2 million, which comprised $404.2 million of net proceeds from the issuance of the 7 ³/4% senior subordinated notes in October 2009, $404.9 million of dividends and dividend equivalent payments, and $23.8 million of cash for tax benefits related to share-based payment arrangements and from the exercise of stock options.

Net cash provided by financing activities during fiscal 2009 was $2.4 million related to the exercise of stock options of $17.6 million partially offset by purchases of treasury stock amounting to $15.2 million.

Description of New Senior Secured Credit Facility and Indentures

In December 2010, TransDigm entered into a senior secured credit facility, which consisted of a $1.55 billion term loan facility and a $245 million revolving credit facility (collectively, the “Existing Senior Secured

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Credit Facility”). The proceeds of the term loan were used to pay the purchase price of and related transaction expenses associated with the acquisition of McKechnie Aerospace and repay a portion of the amounts outstanding under the previous senior secured credit facility.

On February 14, 2011, TransDigm Inc. entered into a new senior secured credit facility which provides for $1.55 billion term loan facility (the “New Senior Secured Credit Facility”), which was fully drawn on February 14, 2011. The New Senior Secured Credit Facility replaced the term loan under the Existing Senior Secured Credit Facility and modified certain terms of the original agreement including extending the maturity date of the term loan and modifying the interest rate provisions.

On March 25, 2011, TransDigm entered into Amendment No. 1 (the “Amendment”) to the Existing Senior Secured Credit Facility. The Amendment provides for a modification to certain terms of the permitted indebtedness covenant contained in the Existing Senior Secured Credit Facility to modify the requirements for incurring certain additional senior indebtedness.

Under the Existing Senior Secured Credit Facility, the revolving credit facility matures in December 2015. At September 30, 2011, the Company had $8.0 million letters of credit outstanding and $237.0 of borrowings available under the Existing Senior Secured Credit Facility.

Under the New Senior Secured Credit Facility, the term loan matures in February 2017. The term loan under the New Senior Secured Credit Facility requires quarterly principal payments that began on March 31, 2011.

The interest rates per annum applicable to the term loan under the New Senior Secured Credit Facility will be, at TransDigm’s option, equal to either an alternate base rate or an adjusted LIBO rate for one, two, three or six-month (or to the extent agreed to by each relevant lender, nine or twelve-month) interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The applicable interest rate on the term loan at September 30, 2011 was 4.0%.

On June 27, 2011, the Company entered into three forward-starting interest rate swap agreements beginning December 31, 2012 to hedge the variable interest rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million through June 30, 2015. These forward-starting interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the New Senior Secured Credit Facility to a fixed rate of 5.17% over the term of the interest rate swap agreements.

All of the indebtedness outstanding under the credit facilities is guaranteed by TD Group and all of TransDigm’s current and future domestic restricted subsidiaries (other than immaterial subsidiaries), and is secured by a first priority security interest in substantially all of the existing and future property and assets, including inventory, equipment, general intangibles, intellectual property, investment property and other personal property (but excluding leasehold interests and certain other assets) of TransDigm and all of TransDigm’s existing and future domestic restricted subsidiaries (other than immaterial subsidiaries), and a first priority pledge of the capital stock of TransDigm and its domestic subsidiaries and 65% of the voting capital stock of certain of TransDigm’s foreign subsidiaries.

The credit facilities contain certain covenants that limit the ability of TD Group, TransDigm and TransDigm’s restricted subsidiaries to, among other things, incur or guarantee additional indebtedness or issue preferred stock, pay distributions on, redeem or repurchase capital stock or redeem or repurchase subordinated debt, make investments, sell assets, enter into agreements that restrict distributions or other payments from restricted subsidiaries to TransDigm, incur or suffer to exist liens securing indebtedness, consolidate, merge or transfer all or substantially all of their assets, and engage in transactions with affiliates. At September 30, 2011, TransDigm was in compliance with all of the covenants contained in the credit facilities.

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The term loan under the New Senior Secured Credit Facility requires mandatory prepayments of principal based on certain percentages of Excess Cash Flow (as therein defined), commencing 90 days after the end of each fiscal year, commencing with the fiscal year ending September 30, 2012, subject to certain exceptions. In addition, subject to certain exceptions (including, with respect to asset sales, the reinvestment in productive assets), TransDigm will be required to prepay the loans outstanding under the term loan facility at 100% of the principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of certain asset sales and issuance or incurrence of certain indebtedness. In addition, if, prior to February 14, 2012, the principal amount of the term loans are (i) prepaid substantially concurrently with the incurrence by TD Group, TransDigm or any its subsidiaries of new bank loans that have an effective yield lower than the yield in effect on the term loans so prepaid or (ii) received by a lender due to a mandatory assignment following the failure of such lender to consent to an amendment of the New Senior Secured Credit Facility that has the effect of reducing the effective interest rate with respect to the term loans, such prepayment or receipt shall be accompanied by a premium of 1.0%.

In December 2010, TransDigm issued $1.6 billion in aggregate principal amount of its 7 ³/4% Senior Subordinated Notes due 2018 (the “2018 Notes”) at an issue price of 100% of the principal amount. The 2018 Notes represent unsecured obligations of TransDigm Inc. ranking subordinate to TransDigm Inc.’s senior debt, as defined in the indenture governing the 2018 Notes (the “Indenture”). Such notes do not require principal payments prior to their maturity in December 2018. Interest under the 2018 Notes is payable semi-annually.

TransDigm utilized a portion of the proceeds from the 2018 Notes to repurchase its 7 ³/4% Senior Subordinated Notes due 2014.

Certain Restrictive Covenants in Our Debt Documents

The credit facilities and the Indenture contain restrictive covenants that, among other things, limit the incurrence of additional indebtedness, the payment of dividends, transactions with affiliates, asset sales, acquisitions, mergers and consolidations, liens and encumbrances, and prepayments of other indebtedness. A breach of any of the covenants or an inability to comply with the required leverage ratio could result in a default under the credit facilities or the Indenture. If any such default occurs, the lenders under the credit facilities and the holders of the 2018 Notes may elect to declare all outstanding borrowings, together with accrued interest and other amounts payable thereunder, to be immediately due and payable. The lenders under the credit facilities also have the right in these circumstances to terminate any commitments they have to provide further borrowings. In addition, following an event of default under the credit facilities, the lenders thereunder will have the right to proceed against the collateral granted to them to secure the debt, which includes our available cash, and they will also have the right to prevent us from making debt service payments on the 2018 Notes.

Stock Repurchase Program

On August 22, 2011, the Board of Directors authorized a common share repurchase program, which was announced on August 23, 2011. Under the terms of the program, the Company may purchase up to a maximum aggregate value of $100 million of its shares of common stock. At September 30, 2011, no shares were repurchased under this program. The program replaces the repurchase program announced on October 23, 2008, under which the Company previously repurchased 494,100 share of its common stock at a gross cost of approximately $15.2 million at a weighted-average price per share of $30.85. No purchases were made under the program during the year.

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Contractual Obligations

The following is a summary of contractual cash obligations as of September 30, 2011 (in millions):

	2012		2013		2014		2015		2016		2017 and thereafter		Total
New Senior Secured Credit Facility(1)	$	15.5	$	15.5	$	15.5	$	15.5	$	15.5	$	1,460.9	$	1,538.4
7 3/4% Senior Subordinated Notes due 2018		—		—		—		—		—		1,600.0		1,600.0
Scheduled Interest Payments(2)		185.3		187.8		188.2		186.5		182.8		285.4		1,216.0
Operating Leases		4.7		3.3		2.6		1.8		1.4		5.9		19.7
Purchase Obligations		13.3		10.0		—		—		—		—		23.3
Total Contractual Cash Obligations	$	218.8	$	216.6	$	206.3	$	203.8	$	199.7	$	3,352.2	$	4,397.4

(1) The new senior secured credit facility will mature in February 2017 and requires quarterly principal payments of $3.9 million.

(2) Assumes that the variable interest rate on our borrowings under our new senior secured credit facility remains constant at 4.0%. In addition, interest payments include the impact of the 5.17% interest rate fixed through our forward-starting swap agreements from December 31, 2012 through June 30, 2015 on an aggregate notional amount of $353 million.

In addition to the contractual obligations set forth above, the Company incurs capital expenditures for the purpose of maintaining and replacing existing equipment and facilities and, from time to time, for facility expansion. Capital expenditures totaled approximately $18.0 million, $12.9 million, and $13.2 million during fiscal 2011, 2010, and fiscal 2009, respectively. The Company expects its capital expenditures in fiscal 2012 to be between $25 million and $30 million and such expenditures are projected to increase moderately thereafter.

New Accounting Standards

New Accounting Standards Not Yet Adopted

In May 2011, the Financial Accounting Standard Board (“FASB”) issued authoritative accounting guidance included in Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurement”. This guidance amends the requirements for measuring fair value and disclosing information about fair value measurements and is effective for the Company during the first quarter of fiscal 2012. Upon adoption, the Company does not expect this standard to have a material impact on its financial condition or results of operations.

In June 2011, the FASB issued authoritative accounting guidance included in ASC Topic 220, “Comprehensive Income”. This guidance eliminates the option to report other comprehensive income and its components in the statement of changes in equity. Companies can elect to present items of net income and other comprehensive income in one continuous statement or in two separate, but consecutive, statements. The Company is currently evaluating which method it will utilize to present items of net income and other comprehensive income. This presentation guidance is effective for the Company on October 1, 2012.

In September 2011, the FASB issued authoritative accounting guidance included in ASC Topic 350, “Intangibles—Goodwill and Other”. This guidance amends the requirements for goodwill impairment testing. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing the two-step impairment test is unnecessary. This guidance is effective for the Company for its annual goodwill impairment testing for the year ending September 30, 2013.

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Additional Disclosure Required by Indenture

Separate financial statements of TransDigm Inc. are not presented since TD Group has no operations or significant assets separate from its investment in TransDigm Inc. and since the 7 ³/4% Senior Subordinated Notes are guaranteed by TD Group and all direct and indirect domestic restricted subsidiaries of TransDigm Inc. As of September 30, 2011, three subsidiaries of TransDigm Inc., all of which are wholly owned foreign subsidiaries, are not obligated to guarantee the 7 ³/4% Senior Subordinated Notes.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our main exposure to market risk relates to interest rates. Our financial instruments that are subject to interest rate risk principally include fixed-rate and floating-rate long-term debt. At September 30, 2011, we had borrowings under our New Senior Secured Credit Facility of $1.54 billion that were subject to interest rate risk. Borrowings under our New Senior Secured Credit Facility bear interest, at our option, at a rate equal to either an alternate base rate or an adjusted LIBO rate for a one-, two-, three- or six-month (or to the extent available to each lender, nine- or twelve-month) interest period chosen by us, in each case, plus an applicable margin percentage. Accordingly, the Company’s cash flows and earnings will be exposed to the market risk of interest rate changes resulting from variable rate borrowings under our New Senior Secured Credit Facility. The effect of a hypothetical one percentage point increase in interest rates would increase the annual interest costs under our New Senior Secured Credit Facility by approximately $15.4 million based on the amount of outstanding borrowings at September 30, 2011. The weighted average interest rate on the $1.54 billion of borrowings under our New Senior Secured Credit Facility on September 30, 2011 was 4.0%.

At September 30, 2011, three forward-starting interest rate swap agreements were in place to swap variable rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million. Beginning December 31, 2012, these interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the new senior secured credit facility to a fixed rate of 5.17% through June 30, 2015.

The fair value of the $1.54 billion aggregate principal amount of borrowings under our New Senior Secured Credit Facility is exposed to the market risk of interest rates. The estimated fair value of such term loan approximated $1.50 billion at September 30, 2011 based upon information provided to the Company from its agent under the credit facility. The fair value of the $1.60 billion aggregate principal amount of our 7 ³/4% senior subordinated notes due 2018 is exposed to the market risk of interest rate changes. The estimated fair value of such notes approximated $1.62 billion at September 30, 2011 based upon quoted market rates.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The information required by this Item is contained on pages F-1 through F-37 of this Report.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

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ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of September 30, 2011, TD Group carried out an evaluation, under the supervision and with the participation of TD Group’s management, including its Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), of the effectiveness of the design and operation of TD Group’s disclosure controls and procedures. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that TD Group’s disclosure controls and procedures are effective to ensure that information required to be disclosed by TD Group in the reports it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified by the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to TD Group’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, TD Group’s management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in designing and evaluating the controls and procedures.

Management’s Report on Internal Control Over Financial Reporting

The management of TD Group is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Exchange Act Rule 13a-15(f). Using criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework, TransDigm’s management assessed the effectiveness of the Company’s internal control over financial reporting as of September 30, 2011. Based on our assessment, management concluded that the Company’s internal control over financial reporting was effective as of September 30, 2011.

On December 6, 2010, we completed our acquisition of McKechnie Aerospace. McKechnie Aerospace’s results of operation are included in our consolidated financial statements from the date of acquisition. As permitted by the SEC, we have elected to exclude McKechnie Aerospace from our assessment of the effectiveness of our internal control over financial reporting as of September 30, 2011. Total assets and net sales of McKechnie Aerospace represent 27% and 18%, respectively, of our total assets and net sales as reported in our consolidated financial statements for fiscal 2011.

The Company’s independent auditors, Ernst & Young LLP, have issued an audit report on the effectiveness of internal control over financial reporting of the Company as of September 30, 2011. This report is included herein.

Changes in Internal Control Over Financial Reporting

On December 6, 2010, we acquired McKechnie Aerospace. McKechnie Aerospace operated under its own set of systems and internal controls and we are currently maintaining those systems and much of that control environment until we are able to incorporate McKechnie Aerospace’s processes into our own systems and control environment. We currently expect to complete the incorporation of McKechnie Aerospace’s operations into our systems and control environment in the first quarter of fiscal 2012. There were no other changes to our internal controls over financial reporting that could have a material effect on our financial reporting during fiscal 2011.

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Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders of

TranDigm Group Incorporated

We have audited TransDigm Group Incorporated’s internal control over financial reporting as of September 30, 2011, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). TransDigm Group Incorporated’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

As indicated in the accompanying Report of Management on Internal Control over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting excluded McKechnie Aerospace, which was acquired during the year ended September 30, 2011. McKechnie Aerospace represented approximately 18% of net sales for the year ended September 30, 2011 and 27% of total assets at September 30, 2011. Our audit of internal control over financial reporting of TransDigm Group Incorporated also did not include an evaluation of the internal control over financial reporting of McKechnie Aerospace.

In our opinion, TransDigm Group Incorporated maintained, in all material respects, effective internal control over financial reporting as of September 30, 2011, based on the COSO criteria.

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We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of TransDigm Group Incorporated as of September 30, 2011 and 2010, and the related consolidated statements of income, stockholders’ equity, and cash flows for each of the three years in the period ended September 30, 2011 of TransDigm Group Incorporated and our report dated November 18, 2011 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Cleveland, Ohio

November 18, 2011

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ITEM 9B. OTHER INFORMATION

None.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE

Directors and Executive Officers

Information regarding TD Group’s directors is set forth under the caption “Proposal One: Election of Directors” in our Proxy Statement, which is incorporated herein by reference. The following table sets forth certain information concerning TD Group’s executive officers:

Name	Age		Position
W. Nicholas Howley		59	Chief Executive Officer and Chairman of the Board of Directors
Robert S. Henderson		55	Executive Vice President
Bernt G. Iversen II		54	Executive Vice President
Raymond F. Laubenthal		50	President and Chief Operating Officer
James Riley		45	Executive Vice President
Albert J. Rodriguez		51	Executive Vice President-Mergers and Acquisitions
Gregory Rufus		55	Executive Vice President, Chief Financial Officer and Secretary

Mr. Howley was named Chairman of the Board of Directors of TD Group in July 2003. He has served as Chief Executive Officer of TD Group since December 2005 and of TransDigm Inc. since December 2001. Mr. Howley was President of TD Group from July 2003 until December 2005. Mr. Howley served as Chief Operating Officer of TransDigm Inc. from December 1998 through December 2001 and served as President of TransDigm Inc. from December 1998 through September 2005. Mr. Howley is a director of Polypore International Inc., a NYSE-listed manufacturer of polymer-based membranes used in separation and filtration processes. Through October 2011, Mr. Howley was a director of Satair A/S, a Danish public company that is an aerospace distributor, including a distributor of the Company’s products.

Mr. Henderson was appointed Executive Vice President of TD Group in December 2005 and Executive Vice President of TransDigm Inc. in October 2005. He was President of the AdelWiggins Group, an operating division of TransDigm Inc., from August 1999 to April 2008.

Mr. Iversen was appointed Executive Vice President of TD Group and TransDigm Inc. on December 6, 2010. Prior to that, he was President of Champion Aerospace LLC, a wholly-owned subsidiary of TransDigm Inc., from June 2006. From July 2001 to June 2006, he served as Director of Engineering and Marketing for Champion Aerospace.

Mr. Laubenthal was appointed President and Chief Operating Officer of TD Group in December 2005, President and Chief Operating Officer of TransDigm Inc. in October 2005 and was President of AeroControlex Group, then operated as a division of TransDigm Inc., from November 1998 through September 2005.

Mr. Riley was appointed Executive Vice President of TD Group and TransDigm Inc. in October 2009. From October 2005 through June 2007, Mr. Riley was President of AeroControlex Group, then operated as a division of TransDigm Inc. and upon its incorporation as a separate subsidiary through September 2009, Mr. Riley was President of AeroControlex Group Inc., a subsidiary of TransDigm Inc. From October 2003 through September 2005, he served as Director of Mergers & Acquisitions for TransDigm Inc. From February 1994 through September 2003, Mr. Riley served AeroControlex Group in various manufacturing, sales and management positions.

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Mr. Rodriguez was appointed Executive Vice President—Mergers and Acquisitions in June 2006. Mr. Rodriguez served as Executive Vice President of TD Group from December 2005 to June 2006, Executive Vice President of TransDigm Inc. from October 2005 to June 2006 and was the President of MarathonNorco Aerospace, Inc., a wholly owned subsidiary of TransDigm Inc., from September 1999 through May 2006.

Mr. Rufus was named Executive Vice President, Chief Financial Officer and Secretary of TD Group in December 2005. He served as Vice President and Chief Financial Officer of TD Group from July 2003 until December 2005. Mr. Rufus was appointed Executive Vice President and Chief Financial Officer of TransDigm Inc. on October 1, 2005 and had been Vice President and Chief Financial Officer of TransDigm Inc. since August 2000.

Section 16(a) Beneficial Ownership Reporting Compliance

The information regarding compliance with Section 16 of the Securities Exchange Act of 1934 is set forth under the caption entitled “Section 16(a) Beneficial Ownership Reporting Compliance” in our Proxy Statement, which is incorporated herein by reference.

Code of Ethics

We have adopted a Code of Business Conduct and Ethics, which applies to all of our directors, officers, and employees and a Code of Ethics for Senior Financial Officers which includes additional ethical obligations for our senior financial management (which includes our chief executive officer, chief financial officer, president, division presidents, controllers, treasurer, and chief internal auditor). Please refer to the information set forth under the caption “Corporate Governance—Codes of Ethics & Whistleblower Policy” in our Proxy Statement, which is incorporated herein by reference. Our Code of Business Conduct and Ethics and our Code of Ethics for Senior Financial Officers is available on our website at www.transdigm.com. Any person may receive a copy without charge by writing to us at TransDigm Group Incorporated, 1301 East 9^th Street, Suite 3000, Cleveland, Ohio 44114. We intend to disclose on our website any amendment to, or waiver from, a provision of our Code of Business Conduct and Ethics that applies to directors and executive officers and that is required to be disclosed pursuant to the rules of the Securities and Exchange Commission.

Nominations of Directors

The procedure by which stockholders may recommend nominees to our Board of Directors is set forth under the caption “Corporate Governance-Board Committees—Nominating and Corporate Governance Committee” in our Proxy Statement, which is incorporated herein by reference.

Audit Committee

The information regarding the audit committee of our Board of Directors and audit committee financial experts is set forth under the caption “Corporate Governance-Board Committees—Audit Committee” in our Proxy Statement, which is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this item is set forth under the captions “Executive Compensation”, “Compensation of Directors”, “Compensation Committee Interlocks and Insider Participation” and “Compensation Committee Report” in our Proxy Statement, which is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information regarding security ownership of certain beneficial owners and management is set forth under the caption “Security Ownership of Certain Beneficial Owners and Management” in our Proxy Statement, which is incorporated herein by reference.

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ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The information required by this item is set forth under the captions entitled “Certain Relationships and Related Transactions,” “Compensation of Directors,” and “Independence of Directors” in our Proxy Statement, which is incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this item is set forth under the caption “Principal Accounting Fees and Services” in our Proxy Statement, which is incorporated herein by reference.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) Documents Filed with Report

(a) (1) Financial Statements

	Page
Report of Independent Registered Public Accounting Firm	F-1
Consolidated Balance Sheets as of September 30, 2011 and 2010.	F-2
Consolidated Statements of Income for Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-3
Consolidated Statements of Changes in Stockholders’ Equity for Fiscal Years Ended September  30, 2011, 2010 and 2009.	F-4
Consolidated Statements of Cash Flows for Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-5
Notes to Consolidated Financial Statements	pages F-6 to F-36
(a) (2) Financial Statement Schedules
Valuation and Qualifying Accounts for the Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-37

51

(a) (3) Exhibits

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
2.1	Stock Purchase Agreement dated September 25, 2010 among McKechnie Holdings LLC, TransDigm Inc. and TransDigm Group Incorporated	Incorporated by reference to Form 8-K filed September 28, 2010 (File No. 001-32833)
3.1	Amended and Restated Certificate of Incorporation, filed March 14, 2006, of TransDigm Group Incorporated	Incorporated by reference to Amendment No. 3 to Form S-1 filed March 13, 2006 (File No. 333-130483)
3.2	Amended and Restated Bylaws of TransDigm Group Incorporated (as amended)	Incorporated by reference to Amendment No. 3 to Form S-1 filed March 13, 2006 (File No. 333-130483)
3.3	Certificate of Incorporation, filed July 2, 1993, of NovaDigm Acquisition, Inc. (now known as TransDigm Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.4	Certificate of Amendment, filed July 22, 1993, of the Certificate of Incorporation of NovaDigm Acquisition, Inc. (now known as TransDigm Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.5	Bylaws of NovaDigm Acquisition, Inc. (now known as TransDigm Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.6	Certificate of Incorporation, filed March 28, 1994, of MPT Acquisition Corp. (now known as MarathonNorco Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.7	Certificate of Amendment, filed May 18, 1994, of the Certificate of Incorporation of MPT Acquisition Corp. (now known as MarathonNorco Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.8	Certificate of Amendment, filed May 24, 1994, of the Certificate of Incorporation of MPT Acquisition Corp. (now known as MarathonNorco Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.9	Certificate of Amendment, filed August 28, 2003, of the Certificate of Incorporation of Marathon Power Technology Company (now known as MarathonNorco Aerospace, Inc.)	Incorporated by reference to TransDigm Group Incorporated’s Form 10-K filed November 28, 2006 (File No. 001-32833)
3.10	Bylaws of MPT Acquisition Corp. (now known as MarathonNorco Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.11	Articles of Incorporation, filed July 30, 1986, of ARP Acquisition Corporation (now known as Adams Rite Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.12	Certificate of Amendment, filed September 12, 1986, of the Articles of Incorporation of ARP Acquisition Corporation (now known as Adams Rite Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)

52

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
3.13	Certificate of Amendment, filed January 27, 1992, of the Articles of Incorporation of Adams Rite Products, Inc. (now known as Adams Rite Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.14	Certificate of Amendment, filed December 31, 1992, of the Articles of Incorporation of Adams Rite Products, Inc. (now known as Adams Rite Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.15	Certificate of Amendment, filed August 11, 1997, of the Articles of Incorporation of Adams Rite Sabre International, Inc. (now known as Adams Rite Aerospace, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.16	Amended and Restated Bylaws of Adams Rite Aerospace, Inc.	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed January 29, 1999 (File No. 333-71397)
3.17	Certificate of Formation, effective June 30, 2007, of Champion Aerospace LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.18	Limited Liability Company Agreement of Champion Aerospace LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.19	Certificate of Formation, effective June 29, 2007, of Avionic Instruments LLC	Incorporated by reference to TransDigm Group Incorporated’s Form 10-K filed November 21, 2007 (File No. 001-32833)
3.20	Limited Liability Company Agreement of Avionic Instruments LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No.333-144366)
3.21	Certificate of Incorporation, filed December 22, 2004, of Skurka Aerospace Inc.	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed October 11, 2006 (File No. 333-137937)
3.22	Bylaws of Skurka Aerospace Inc.	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed October 11, 2006 (File No. 333-137937)
3.23	Certificate of Conversion, effective June 30, 2007, converting CDA InterCorp into CDA InterCorp LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.24	Operating Agreement of CDA InterCorp LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.25	Certificate of Incorporation, filed March 7, 2003, of Wings Holdings, Inc. (now known as Aviation Technologies, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.26	Certificate of Amendment of Certificate of Incorporation, filed May 12, 2003, of Wings Holdings, Inc. (now known as Aviation Technologies, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)

53

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
3.27	Certificate of Amendment of Certificate of Incorporation, filed July 17, 2003, of Wings Holdings, Inc. (now known as Aviation Technologies, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.28	Bylaws of Wings Holdings, Inc. (now known as Aviation Technologies, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.29	Articles of Incorporation, filed October 3, 1963, of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.30	Articles of Amendment of Articles of Incorporation, filed March 30, 1984, of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.31	Articles of Amendment of Articles of Incorporation, filed April 17, 1989, of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.32	Articles of Amendment of Articles of Incorporation, filed July 17, 1998, of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.33	Articles of Amendment of Articles of Incorporation, filed May 20, 2003, of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4, filed July 6, 2007 (File No. 333-144366)
3.34	Bylaws of Avtech Corporation	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.35	Certificate of Formation, effective June 30, 2007, of Transicoil LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.36	Limited Liability Company Agreement of Transicoil LLC	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.37	Certificate of Incorporation, filed May 17, 2006, of Bruce Industries Acquisition Corp. (now known as Malaysian Aerospace Services, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.38	Certificate of Amendment of Certificate of Incorporation, filed January 19, 2007, of Bruce Industries Acquisition Corp. (now known as Malaysian Aerospace Services, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.39	Bylaws of Bruce Industries Acquisition Corp. (now known as Malaysian Aerospace Services, Inc.)	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.40	Certificate of Incorporation, filed June 18, 2007, of AeroControlex Group, Inc.	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)

54

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
3.41	Bylaws of AeroControlex Group, Inc.	Incorporated by reference to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed July 6, 2007 (File No. 333-144366)
3.42	Certificate of Incorporation filed August 6, 2007, of Bruce Aerospace, Inc.	Incorporated by reference to Form 10-K filed November 21, 2007 (File No. 001-32833)
3.43	Bylaws of Bruce Aerospace, Inc.	Incorporated by reference to Form 10-K filed November 21, 2007 (File No. 001-32833)
3.44	Articles of Incorporation, filed February 6, 2006 of Bruce Industries, Inc.	Incorporated by reference to Form 10-K filed November 21, 2007 (File No. 001-32833)
3.45	Bylaws of Bruce Industries, Inc.	Incorporated by reference to Form 10-K filed November 21, 2007 (File No. 001-32833)
3.46	Certificate of Formation, filed September 30, 2010, of CEF Industries, LLC	Incorporated by reference to Form 10-K filed November 15, 2010 (File No. 001-32833)
3.47	Limited Liability Company Agreement of CEF Industries, LLC	Incorporated by reference to Form 10-K filed November 15, 2010 (File No. 001-32833)
3.48	Certificate of Incorporation, filed September 20, 1960, of Aircraft Parts Corporation	Incorporated by reference to Form 10-Q filed February 4, 2009 (File No. 001-32833)
3.49	Bylaws of Aircraft Parts Corporation	Incorporated by reference to Form 10-Q filed February 4, 2009 (File No. 001-32833)
3.50	Certificate of Incorporation, filed July 10, 2009, of Acme Aerospace Inc.	Incorporated by reference to Form 10-Q filed August 25, 2009 (File No. 001-32833)
3.51	Bylaws of Acme Aerospace Inc.	Incorporated by reference to Form 10-Q filed August 25, 2009 (File No. 001-32833)
3.52	Certificate of Incorporation, filed November 20, 2009, of Dukes Aerospace, Inc.	Incorporated by reference to Form 8-K filed December 3, 2009 (File No. 001-32833)
3.53	Bylaws of Dukes Aerospace, Inc.	Incorporated by reference to Form 8-K filed December 3, 2009 (File No. 001-32833)
3.54	Certificate of Incorporation of Semco Instruments, Inc.	Incorporated by reference to Form 8-K filed September 7, 2010 (File No. 001-32833)
3.55	Amended and Restated Bylaws of Semco Instruments, Inc.	Incorporated by reference to Form 8-K filed September 7, 2010 (File No. 001-32833)
3.56	Certificate of Incorporation, filed April 25, 2007, of McKechnie Aerospace Holdings, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.57	Bylaws of McKechnie Aerospace Holdings, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.58	Certificate of Incorporation, filed April 13, 2007, of McKechnie Aerospace DE, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.59	Bylaws of McKechnie Aerospace DE, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.60	Certificate of Formation, filed May 11, 2005, of Melrose US 3 LLC (now known as McKechnie Aerospace US LLC)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)

55

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
3.61	Certificate of Amendment, filed May 11, 2007, to Certificate of Formation of Melrose US 3 LLC (now known as McKechnie Aerospace US LLC)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.62	Limited Liability Company Agreement of McKechnie Aerospace US LLC	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.63	Certificate of Incorporation, filed December 11, 1998, of McKechnie US Holdings Inc. (now known as McKechnie Aerospace Investments, Inc.)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.64	Certificate of Amendment, filed May 11, 2007, to the Certificate of Incorporation of McKechnie Investments, Inc. (now known as McKechnie Aerospace Investments, Inc.)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.65	Amended and Restated Bylaws of McKechnie Aerospace Investments, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.66	Certificate of Formation, filed February 29, 2000, of Western Sky Industries, LLC	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.67	Second Amended and Restated Limited Liability Agreement of Western Sky Industries, LLC	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.68	Articles of Incorporation, filed May 10, 1957, of Hartwell Aviation Supply Company (now known as Hartwell Corporation)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.69	Certificate of Amendment, filed June 9, 1960, of Articles of Incorporation of Hartwell Aviation Supply Company (now known as Hartwell Corporation)	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.70	Certification of Amendment, filed October 23, 1987, of Articles of Incorporation of Hartwell Corporation	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.71	Certificate of Amendment, filed April 9, 1997, of Articles of Incorporation of Hartwell Corporation	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.72	Bylaws of Hartwell Corporation	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.73	Articles of Incorporation, filed August 6, 1999, of Texas Rotronics, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
3.74	Bylaws of Texas Rotronics, Inc.	Incorporated by reference to Form 10-Q filed February 8, 2011 (File No. 001-32833)
4.1	Form of Stock Certificate	Incorporated by reference to Amendment No. 3 to Form S-1 filed March 13, 2006 (File No. 333-130483)

56

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
4.2	Indenture, dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee	Incorporated by reference to Form 8-K filed June 28, 2006 (File No. 001-32833)
4.3	Form of Supplemental Indenture to Indenture dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee	Filed herewith
4.4	Indenture, dated as of October 6, 2009, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee	Incorporated by reference to Form 8-K filed October 6, 2009 (File No. 001-32833)
4.5	Form of Supplemental Indenture to Indenture dated October 6, 2009, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee	Filed herewith
4.6	Indenture, dated as of December 14, 2010, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Mellon Trust Company, N.A., as trustee incorporated by reference to Form 8-K filed September 23, 2011 (File No. 001-32833)	Incorporated by reference to Form 8-K filed December 15, 2010 (File No. 001-32833)
4.7	First Supplemental Indenture, dated as of September 22, 2011, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Mellon Trust Company, N.A., as Trustee	Incorporated by reference to Form 8-K filed September 23, 2011 (File No. 001-32833)
4.8	Form 7 3/4% Senior Subordinated Notes due 2014	Included in Exhibit 4.2
4.9	Form 7 3/4% Senior Subordinated Notes due 2014	Included in Exhibit 4.4
4.10	Form 7 3/4% Senior Subordinated Notes due 2018	Included in Exhibit 4.6
4.11	Form of Notation of Guarantee	Included in Exhibit 4.6
10.1	Amended and Restated Employment Agreement, dated June 3, 2008, between W. Nicholas Howley and TransDigm Group Incorporated*	Incorporated by reference to Form 8-K filed June 6, 2008 (File No. 001-32833)
10.2	Second Amended and Restated Employment Agreement, dated February 24, 2011, between TransDigm Group Incorporated and W. Nicholas Howley*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)

57

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.3	Amended and Restated Employment Agreement, dated October 29, 2008, between Raymond Laubenthal and TransDigm Group Incorporated*	Incorporated by reference to Form 8-K filed October 30, 2008 (File No. 333-130483)
10.4	Second Amended and Restated Employment Agreement, dated February 24, 2011, between TransDigm Group Incorporated and Raymond Laubenthal*	Incorporated by reference to Form 8’K filed February 25, 2011 (File No. 001-32833)
10.5	Amended and Restated Employment Agreement, dated October 29, 2008, between Gregory Rufus and TransDigm Group Incorporated*	Incorporated by reference to Form 8-K filed October 30, 2008 (File No. 333-130483)
10.6	Second Amended and Restated Employment Agreement, dated February 24, 2011, between TransDigm Group Incorporated and Gregory Rufus*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.7	Employment Agreement, dated February 24, 2011, between TransDigm Group Incorporated and Robert Henderson*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.8	Employment Agreement, dated February 24, 2011, between TransDigm Group Incorporated and James Riley*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.9	Employment Agreement, Dated February 24, 2011, between TransDigm Group Incorporated and Bernt Iversen*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.10	Employment Agreement, Dated February 24, 2011, between TransDigm Group Incorporated and Albert Rodriguez*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.11	TransDigm Group Incorporated Fourth Amended and Restated 2003 Stock Option Plan*	Incorporated by reference to Amendment No. 1 to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed November 7, 2006 (File No. 333-137937)
10.12	Amendment No. 1 to TransDigm Group Incorporated Fourth Amended and Restated 2003 Stock Option Plan*	Incorporated by reference to Form 10-K filed November 21, 2007 (File No. 001-32833)
10.13	Letter, dated February 24, 2006, from David Barr, Member of the Compensation Committee of the Board of Directors of TransDigm Group Incorporated, to W. Nicholas Howley, Chief Executive Officer of TransDigm Group Incorporated*	Incorporated by reference to Amendment No. 2 to Form S-1 filed February 27, 2006 (File No. 333-130483)
10.14	Amendment No. 2 to TransDigm Group Incorporated Fourth Amended and Restated Stock Option Plan*	Incorporated by reference to Form 10-Q filed August 7, 2008 (File No. 001-32833)

58

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.15	Amendment No. 3 to TransDigm Group Incorporated Fourth Amended and Restated Stock Option Plan*	Incorporated by reference to Form 8-K filed April 28, 2009 (File No. 001-32833)
10.16	Form of Management Option Agreement, between TD Holding Corporation and the applicable executive regarding the rollover options granted to such executive *	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4, filed August 29, 2003 (File No. 333-10834006)
10.17	Form of Management Option Agreement, between TD Holding Corporation and the applicable executive regarding the time vested options granted to such executive under the 2003 Stock Option Plan (pre-IPO) *	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4, filed August 29, 2003 (File No. 333-10834006)
10.18	Form of Management Option Agreement, between TD Holding Corporation and the applicable executive regarding the performance vested options granted to such executive under the 2003 Stock Option Plan (pre-IPO)*	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form S-4, filed August 29, 2003 (File No. 333-10834006)
10.19	Form of Management Option Agreement, between TransDigm Group Incorporated and the applicable executive regarding the time vested options granted to such executive under the Fourth Amended and Restated 2003 Stock Option Plan (post-IPO)*	Incorporated by reference to Form 10-K filed November 28, 2006 (File No. 001-32833)
10.20	Form of Management Option Agreement, between TransDigm Group Incorporated and the applicable executive regarding the performance vested options granted to such executive under the Fourth Amended and Restated 2003 Stock Option Plan (post-IPO)*	Incorporated by reference to Form 10-K filed November 28, 2006 (File No. 001-32833)
10.21	TransDigm Group Incorporated 2006 Stock Incentive Plan*	Incorporated by reference to Amendment No. 3 to Form S-1 filed March 13, 2006 (File No. 333-130483)
10.22	Amendment No. 1, dated October 20, 2006, to the TransDigm Group Incorporated 2006 Stock Incentive Plan*	Incorporated by reference to Amendment No. 1 to TransDigm Inc. and TransDigm Group Incorporated’s Form S-4 filed November 7, 2006 (File No. 333-137937)
10.23	Second Amendment to TransDigm Group Incorporated 2006 Stock Incentive Plan, dated April 25, 2008*	Incorporated by reference to Schedule 14A filed June 6, 2008 (File No. 001-32833)
10.24	Form of Restricted Stock Award Agreement under TransDigm Group Incorporated 2006 Stock Incentive Plan	Incorporated by reference to Form 10-Q filed May 8, 2007 (File No. 001-32833)
10.25	Form of Option Agreement under 2008 stock incentive program under TransDigm Group Incorporated 2006 Stock Incentive Plan*	Incorporated by reference to Form 8-K filed November 21, 2008 (File No. 333-130483)

59

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.26	Form of Amendment to Stock Option Agreement made in January 2011 to options under 2008 stock incentive program	Incorporated by reference to Form 8-K filed January 18, 2011 (File No. 001-32833)
10.27	Form of Option Agreement under 2008 stock incentive program, incorporating amendments made in January 2011 (in the form of options granted in fiscal 2011)*	Incorporate by reference to Form 10-Q filed February 28, 2011 (File No. 001-32833)
10.28	Text of Option Amendments made in February 2011 (to options under 2003 Stock Option Plan and under 2008 stock incentive program)*	Incorporated by reference to Form 8-K filed February 25, 2011 (File No. 001-32833)
10.29	Form of Option Agreement under 2008 stock incentive program (in the form of options granted in fiscal 2011 for re-loads)*	Incorporated by reference to Form 8-K filed March 7, 2011 (File No. 001-32833)
10.30	Text of Option Amendments made in April 2011 (to options under 2008 stock incentive program for optionees who received re-loads)*	Incorporated by reference to Form 8-K filed May 3, 2011 (File No. 001-82833)
10.31	Amended and Restated TD Holding Corporation Dividend Equivalent Plan*	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form 8-K filed December 22, 2005 (File No. 333-10834006)
10.32	Second Amended and Restated TransDigm Group Incorporated 2003 Stock Option Plan Dividend Equivalent Plan*	Incorporated by reference to Form 8-K filed April 28, 2009 (File No. 001-32833)
10.33	Third Amended and Restated TransDigm Group Incorporated 2003 Stock Option Plan Dividend Equivalent Plan*	Incorporated by reference to Form 8-K filed October 6, 2009 (File No. 001-32833)
10.34	TransDigm Group Incorporated 2006 Stock Incentive Plan Dividend Equivalent Plan*	Incorporated by reference to Form 8-K filed June 6, 2008 (File No. 333-130483)
10.35	Amended and Restated TransDigm Group Incorporated 2006 Stock Incentive Plan Dividend Equivalent Plan*	Incorporated by reference to Form 8-K filed April 28, 2009 (File No. 001-32833)
10.36	Second Amended and Restated TransDigm Group Incorporated 2006 Stock Incentive Plan Dividend Equivalent Plan*	Incorporated by reference to Form 8-K filed October 6, 2009 (File No. 001-32833)
10.37	Amended and Restated Stock Option Agreement dated June 2004 between TransDigm Group Incorporated and Michael Graff	Incorporated by reference to Form 8-K filed October 6, 2009 (File No. 001-32833)
10.38	First Amendment to Amended and Restated Stock Option Agreement dated October 5, 2009 between TransDigm Group Incorporated and Michael Graff	Filed with Exhibit 10.27
10.39	Amended and Restated TransDigm Inc. Executive Retirement Savings Plan *	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form 8-K filed December 22, 2005 (File No. 333-10834006)

60

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.40	Tax Sharing Agreement, dated July 22, 2003, among TD Holding Corporation, TransDigm Holding Company, TransDigm Inc. and such direct and indirect subsidiaries of TD Holding Corporation that are listed on Exhibit A thereto	Incorporated by reference to Amendment No. 1 to TransDigm Inc. and TransDigm Holding Company’s Form S-4 filed October 30, 2003 (File No. 333-10834006)
10.41	Credit Agreement, dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, the financial institutions from time to time party thereto, as lenders, Credit Suisse, as administrative agent and collateral agent, Credit Suisse Securities (USA) LLC and Bank of America Securities LLC, as joint lead arrangers and joint bookrunners, Bank of America, N.A., as syndication agent, and Barclays Bank plc, General Electrical Capital Corporation and UBS Securities LLC, as co-documentation agents	Incorporated by reference to Form 8-K filed on June 28, 2006 (File No. 001-32833)
10.42	Amendment No. 1. Consent and Agreement, dated January 25, 2007, to the Credit Agreement, dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, the financial institutions from time to time party thereto, as lenders, Credit Suisse, as administrative agent and collateral agent, Credit Suisse Securities (USA) LLC and Bank of America Securities LLC, as joint lead arrangers and joint bookrunners, Bank of America, N.A., as syndication agent, and Barclays Bank plc, General Electric Capital Corporation and UBS Securities LLC, as co-documentation agents	Incorporated by reference to TransDigm Inc. and TransDigm Holding Company’s Form 8-K filed February 13, 2007 (File No. 333-130483)
10.43	Form of Joinder Agreement between the applicable subsidiaries and Credit Suisse, as administrative and collateral agent	Filed herewith

61

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.44	Credit Agreement, dated as of December 6, 2010, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, the financial institutions from time to time party thereto, as lenders, Credit Suisse AG, as administrative agent and collateral agent, Credit Suisse Securities (USA) LLC and UBS Securities LLC, as joint lead arrangers, Credit Suisse Securities (USA) LLC, UBS Securities LLC, Morgan Stanley Senior Funding, Inc. and Barclays Capital, as joint bookrunners, UBS Securities LLC, as syndication agent, and Mizuho Corporate Bank, Ltd. And PNC Capital Markets, LLC as co-documentation agents	Incorporated by reference to Form 8-K filed December 9, 2010 (File No. 001-32833)
10.45	Amendment No. 1, dated as of March 25, 2011, to Credit agreement dated as of December 6, 2010, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, as lenders, Credit Suisse AG, ad administrative agent and collateral agent, Credit Suisse securities (USA) LLC and UBS Securities LLC, as joint lead arrangers, Credit Suisse Securities (USA) LLC, UBS Securities LLC, Morgan Stanley Senior Funding, Inc. and Barclays Capital, as joint bookrunners, UBS Securities LLC, as syndication agent, and Mizuho Corporate Bank, Ltd. And PNC Capital market LLC, as co-documentation agents	Incorporated by reference to Form 8-K filed March 28, 2011
10.46	Joinder Agreement dated as of December 6, 2010, among McKechnie Aerospace Holdings, Inc., McKechnie Aerospace DE, Inc., McKechnie Aerospace US LLC, McKechnie Aerospace Investments, Inc., Valley-Todeco, Inc., Hartwell Corporation, Western Sky Industries, LLC, Texas Rotronics, Inc. and Credit Suisse AG, as agent	Incorporated by reference to Form 8-K filed December 9, 2010 (File No. 001-32833)
10.47	Form of Joinder Agreement, dated as of September 22, 2011, between Schneller Holdings LLC, Schneller LLC, Schneller International Sales Corp. and Credit Suisse, as agent	Filed herewith

62

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
10.48	Credit Agreement, dated as of February 14, 2011, amount TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, the financial institutions party thereto, as lenders, Credit Suisse AG, as administrative agent and collateral agent, and Credit Suisse Securities (USA) LLC, as sole lead arrange and sole bookrunner	Incorporated by reference to Form 8-K filed February 15, 2011 (file No. 001-32833)
10.49	Guarantee and Collateral Agreement, dated as of June 23, 2006, as amended and restated as of December 6, 2010, as further amended and restated as of February 14, 2011, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. named therein and Credit Suisse AG as administrative agent and collateral agent	Incorporated by reference to Form 8-K filed February 15, 2011 (file No. 001-32833)
10.50	Form of Joinder Agreement, dated as of September 22, 2011, between Schneller Holdings LLC, Schneller LLC, Schneller International Sales Corp. and Credit Suisse, as agent	Filed herewith
10.51	Supplement No. 1 dated as of September 22, 2011, to the Guarantee and Collateral Agreement, as amended and restated as of February 14, 2011, among Schneller Holdings LLC, Schneller LLC, Schneller International Sales Corp., and Credit Suisse AG, as agent	Incorporated by reference to Form 8-K filed March 28, 2011
10.52	Stock Purchase Agreement, dated January 28, 2011, among TransDigm Inc., McKechnie Aerospace (Europe) Ltd., McKechnie Aerospace Investments, Inc., and Alcoa Global Fasteners, Inc.	Incorporated by reference to Form 8-K filed February 1, 2011
12.1	Statement of Computation of Ratio of Earnings to Fixed Charges	Filed herewith
21.1	Subsidiaries of TransDigm Group Incorporated	Filed herewith
23.1	Consent of Independent Registered Public Accounting Firm	Filed herewith
31.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith
31.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith

63

Exhibit No.	Description	Filed Herewith or Incorporated by Reference From
32.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	Filed herewith
32.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	Filed herewith
101	Financial Statements and Notes to Consolidated Financial Statements formatted in XBRL.	Filed herewith

* Indicates management contract or compensatory plan contract or arrangement.

64

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized on November 18, 2011.

TRANSDIGM GROUP INCORPORATED
By:	/s/    Gregory Rufus
Name:	Gregory Rufus
Title:	Executive Vice President, Chief Financial Officer and Secretary

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the registrant and in the capacities and as of the dates indicated.

Signature	Title	Date
/s/    W. Nicholas Howley         W. Nicholas Howley	Chairman of Board of Directors and Chief Executive Officer(Principal Executive Officer)	November 18, 2011
/s/    Gregory Rufus         Gregory Rufus	Executive Vice President, Chief Financial Officer and Secretary (Principal Financial and Accounting Officer)	November 18, 2011
/s/    William Dries         William Dries	Director	November 18, 2011
/s/    Mervin Dunn         Mervin Dunn	Director	November 18, 2011
/s/    Michael Graff         Michael Graff	Director	November 18, 2011
/s/    Sean P. Hennessy         Sean P. Hennessy	Director	November 18, 2011
/s/    Douglas Peacock         Douglas Peacock	Director	November 18, 2011
/s/    Robert J. Small         Robert J. Small	Director	November 18, 2011

65

TRANSDIGM GROUP INCORPORATED AND SUBSIDIARIES

ANNUAL REPORT ON FORM 10-K:

FISCAL YEAR ENDED SEPTEMBER 30, 2011

ITEM 8 AND ITEM 15(a) (1)

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEX

	Page
Financial Statements:
Report of Independent Registered Public Accounting Firm	F-1
Consolidated Balance Sheets as of September 30, 2011 and 2010.	F-2
Consolidated Statements of Income for Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-3
Consolidated Statements of Changes in Stockholders’ Equity for Fiscal Years Ended September  30, 2011, 2010 and 2009.	F-4
Consolidated Statements of Cash Flows for Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-5
Notes to Consolidated Financial Statements for Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-6 – F-36
Supplementary Data:
Valuation and Qualifying Accounts for the Fiscal Years Ended September 30, 2011, 2010 and 2009.	F-37

66

Report of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders of

TransDigm Group Incorporated

We have audited the accompanying consolidated balance sheets of TransDigm Group Incorporated as of September 30, 2011 and 2010, and the related consolidated statements of income, stockholders’ equity, and cash flows for each of the three years in the period ended September 30, 2011. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of TransDigm Group Incorporated at September, 30, 2011 and 2010, and the consolidated results of its operations and its cash flows for each of the three years in the period ended September 30, 2011, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

As discussed in Note 3 to the consolidated financial statements, “Summary of Significant Accounting Policies,” the Company adopted a change in the method of accounting in 2010 regarding the date of the Company’s annual goodwill and indefinite-lived intangible assets impairment test.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), TransDigm Group Incorporated’s internal control over financial reporting as of September 30, 2011, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated November 18, 2011, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Cleveland, Ohio

November 18, 2011

F-1

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED BALANCE SHEETS

AS OF SEPTEMBER 30, 2011 AND 2010

(Amounts in thousands, except share amounts)

	2011			2010
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	376,183		$	234,112
Trade accounts receivable—Net		189,293			134,461
Inventories		265,317			188,756
Deferred income taxes		30,844			15,200
Prepaid expenses and other		8,655			10,979
Total current assets		870,292			583,508
PROPERTY, PLANT AND EQUIPMENT—Net		150,800			99,613
GOODWILL		2,595,747			1,571,664
TRADEMARKS AND TRADE NAMES		344,942			187,556
OTHER INTANGIBLE ASSETS—Net		483,424			212,838
DEBT ISSUE COSTS—Net		59,007			18,649
OTHER		9,424			3,990
TOTAL ASSETS	$	4,513,636		$	2,677,818
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	15,500		$	—
Accounts payable		62,110			44,226
Accrued liabilities		120,312			68,786
Income taxes payable		8,937			—
Total current liabilities		206,859			113,012
LONG-TERM DEBT		3,122,875			1,771,646
DEFERRED INCOME TAXES		310,451			168,588
OTHER NON-CURRENT LIABILITIES		62,502			31,593
Total liabilities		3,702,687			2,084,839
STOCKHOLDERS’ EQUITY:
Common stock—$.01 par value; authorized 224,400,000 shares; issued 50,829,276 and 49,928,241 at September 30, 2011 and 2010, respectively		508			499
Additional paid-in capital		464,700			419,396
Retained earnings		364,260			192,126
Accumulated other comprehensive loss		(3,277	)		(3,800	)
Treasury stock, at cost; 494,100 shares at September 30, 2011 and 2010		(15,242	)		(15,242	)
Total stockholders’ equity		810,949			592,979
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	4,513,636		$	2,677,818

See Notes to Consolidated Financial Statements.

F-2

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF INCOME

(Amounts in thousands, except per share amounts)

	Fiscal Years Ended September 30,
	2011		2010		2009
NET SALES	$	1,206,021	$	827,654	$	761,552
COST OF SALES		544,836		354,588		332,206
GROSS PROFIT		661,185		473,066		429,346
SELLING AND ADMINISTRATIVE EXPENSES		133,711		94,918		80,018
AMORTIZATION OF INTANGIBLE ASSETS		40,339		15,079		13,928
INCOME FROM OPERATIONS		487,135		363,069		335,400
REFINANCING COSTS		72,454		—		—
INTEREST EXPENSE—Net		185,256		112,234		84,398
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		229,425		250,835		251,002
INCOME TAX PROVISION		77,200		87,390		88,100
INCOME FROM CONTINUING OPERATIONS		152,225		163,445		162,902
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX		19,909		—		—
NET INCOME	$	172,134	$	163,445	$	162,902
NET INCOME APPLICABLE TO COMMON STOCK	$	169,323	$	133,132	$	162,902
Net earnings per share—see Note 5:
Net earnings per share from continuing operations—basic and diluted	$	2.80	$	2.52	$	3.10
Net earnings per share from discontinued operations—basic and diluted		0.37		—		—
Net earnings per share	$	3.17	$	2.52	$	3.10
Cash dividends paid per common share	$	—	$	7.65	$	—
Weighted-average shares outstanding:
Basic and diluted		53,333		52,923		52,539

See Notes to Consolidated Financial Statements.

F-3

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(Amounts in thousands, except share and per share amounts)

	Common Stock				Additional Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income/(Loss)			Treasury Stock						Total
	Number of Shares		Common Stock										Number of Shares			Value
BALANCE—October 1, 2008		48,600,848	$	486	$	365,224	$	287,745		$	445			—		$	—		$	653,900
Treasury stock purchased		—		—		—		—			—			(494,100	)		(15,242	)		(15,242	)
Compensation expense recognized for employee stock options		—		—		5,782		—			—			—			—			5,782
Excess tax benefits related to share-based payment arrangements		—		—		9,278		—			—			—			—			9,278
Exercise of employee stock options		842,750		8		8,337		—			—			—			—			8,345
Restricted stock compensation		—		—		31		—			—			—			—			31
Common stock issued		4,430		—		120		—			—			—			—			120
Comprehensive income (loss):
Net income		—		—		—		162,902			—			—			—			162,902
Interest rate swap, net of tax		—		—		—		—			(5,306	)		—			—			(5,306	)
Other comprehensive loss		—		—		—		—			(648	)		—			—			(648	)
Comprehensive income																				156,948
BALANCE—September 30, 2009		49,448,028		494		388,772		450,647			(5,509	)		(494,100	)		(15,242	)		819,162
Dividends paid		—		—		—		(404,868	)		—			—			—			(404,868	)
Unvested dividend equivalent payments		—		—		—		(17,098	)		—			—			—			(17,098	)
Compensation expense recognized for employee stock options		—		—		6,693		—			—			—			—			6,693
Excess tax benefits related to share-based payment arrangements		—		—		17,459		—			—			—			—			17,459
Exercise of employee stock options		477,776		5		6,356		—			—			—			—			6,361
Restricted stock compensation		—		—		11		—			—			—			—			11
Common stock issued		2,437		—		105		—			—			—			—			105
Comprehensive income (loss):
Net income		—		—		—		163,445			—			—			—			163,445
Interest rate swap, net of tax		—		—		—		—			2,467			—			—			2,467
Other comprehensive loss		—		—		—		—			(758	)		—			—			(758	)
Comprehensive income																				165,154
BALANCE—September 30, 2010		49,928,241		499		419,396		192,126			(3,800	)		(494,100	)		(15,242	)		592,979
Compensation expense recognized for employee stock options		—		—		12,568		—			—			—			—			12,568
Excess tax benefits related to share-based payment arrangements		—		—		23,411		—			—			—			—			23,411
Exercise of employee stock options		899,395		9		9,199		—			—			—			—			9,208
Restricted stock compensation		—		—		6		—			—			—			—			6
Common stock issued		1,640		—		120		—			—			—			—			120
Comprehensive income (loss):
Net income		—		—		—		172,134			—			—			—			172,134
Interest rate swaps, net of tax		—		—		—		—			(1,077	)		—			—			(1,077	)
Foreign currency translation adjustments		—		—		—		—			1,498			—			—			1,498
Other comprehensive income		—		—		—		—			102			—			—			102
Comprehensive income																				172,657
BALANCE—September 30, 2011		50,829,276	$	508	$	464,700	$	364,260		$	(3,277	)		(494,100	)	$	(15,242	)	$	810,949

See Notes to Consolidated Financial Statements.

F-4

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)

	Fiscal Years Ended September 30,
	2011			2010			2009
OPERATING ACTIVITIES:
Net income	$	172,134		$	163,445		$	162,902
Net income from discontinued operations		(19,909	)		—			—
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		20,092			15,086			13,593
Amortization of intangible assets		40,368			15,079			13,928
Amortization of debt issue costs		9,842			7,578			3,251
Refinancing costs		72,454			—			—
Non-cash equity compensation		12,574			6,704			5,813
Excess tax benefits related to share-based payment arrangements		(23,411	)		(17,459	)		(9,278	)
Deferred income taxes		8,888			1,900			8,800
Changes in assets/liabilities, net of effects from acquisitions of businesses:
Trade accounts receivable		(15,150	)		(17,721	)		(346	)
Inventories		(9,841	)		2,893			(4,518	)
Income taxes receivable/payable		(22,264	)		13,094			3,933
Other assets		(2,700	)		513			(2,335	)
Accounts payable		4,383			4,933			8,808
Accrued and other liabilities		13,118			1,259			(7,439	)
Net cash provided by operating activities		260,578			197,304			197,112
INVESTING ACTIVITIES:
Capital expenditures		(18,026	)		(12,887	)		(13,155	)
Acquisition of businesses, net of cash acquired		(1,650,363	)		(166,557	)		(155,233	)
Cash proceeds from sales of discontinued operations		271,361			—			—
Cash proceeds from sale of real estate		—			2,885			—
Net cash used in investing activities		(1,397,028	)		(176,559	)		(168,388	)
FINANCING ACTIVITIES:
Excess tax benefits related to share-based payment arrangements		23,411			17,459			9,278
Proceeds from exercise of stock options		9,208			6,361			8,345
Dividends paid		(2,811	)		(404,868	)		—
Treasury stock purchased		—			—			(15,242	)
Proceeds from new senior secured credit facility—net		1,500,048			—			—
Repayment on new senior secured credit facility		(11,625	)		—			—
Proceeds from senior subordinated notes due 2018—net		1,582,184			—			—
Proceeds from senior subordinated notes due 2014—net		—			404,248			—
Repurchase of senior subordinated notes due 2014		(1,041,894	)		—			—
Repayment of existing senior secured credit facility		(780,000	)		—			—
Net cash provided by financing activities		1,278,521			23,200			2,381
NET INCREASE IN CASH AND CASH EQUIVALENTS		142,071			43,945			31,105
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		234,112			190,167			159,062
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	376,183		$	234,112		$	190,167
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	$	155,849		$	97,713		$	82,247
Cash paid during the period for income taxes	$	88,367		$	72,498		$	75,306

See Notes to Consolidated Financial Statements.

F-5

TRANSDIGM GROUP INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. DESCRIPTION OF THE BUSINESS

Description of the Business—TransDigm Group Incorporated (“TD Group”), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. TransDigm Inc. along with TransDigm Inc.’s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the “Company” or “TransDigm”), offers a broad range of proprietary aerospace components. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group’s common stock is listed on The New York Stock Exchange, or the NYSE, under the trading symbol “TDG.”

Major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, engineered interior surfaces and lighting and control technology.

Separate Financial Statements—Separate financial statements of TransDigm Inc. are not presented because TransDigm Inc.’s 7 ³/4% senior subordinated notes are fully and unconditionally guaranteed on a senior subordinated basis by TD Group and all existing domestic subsidiaries of TransDigm Inc. and because TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

2. ACQUISITIONS

Schneller Holdings—On August 31, 2011, TransDigm Inc. acquired all of the outstanding equity interests in Schneller Holdings LLC (“Schneller”) for approximately $288.5 million in cash, subject to adjustments based on the level of working capital as of the closing date of the acquisition. Schneller designs and manufactures proprietary, highly engineered laminates, thermoplastics, and non-textile flooring for use primarily on side walls, lavatories, galleys, bulkheads and cabin floors for commercial aircraft. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $195 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Talley Actuation—On December 31, 2010, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired the actuation business of Telair International Inc. (“Talley Actuation”), a wholly-owned subsidiary of Teleflex Incorporated, for approximately $93.6 million in cash, which includes a purchase price adjustment of $0.3 million received in the third quarter of fiscal 2011. Talley Actuation manufactures proprietary, highly engineered electro-mechanical products and other components for commercial and military aircraft. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $70 million of goodwill recognized for the acquisition will be deductible for tax purposes.

McKechnie Aerospace Holdings, Inc.—On December 6, 2010, TransDigm Inc. acquired all of the outstanding stock of McKechnie Aerospace Holdings Inc. (“McKechnie Aerospace”), for approximately $1.27 billion in cash, which includes a purchase price adjustment of $0.3 million paid in the third quarter of fiscal 2011. McKechnie Aerospace, through its subsidiaries, is a leading global designer, producer and supplier of aerospace components, assemblies and subsystems for commercial aircraft, regional/business jets, military fixed wing and rotorcraft. Some of the businesses acquired as part of McKechnie Aerospace have been divested. See Note 21 to the Consolidated Financial Statements. The remaining products fit well with TransDigm’s overall business direction.

F-6

The Company financed the McKechnie Aerospace acquisition, repaid borrowings under the previous senior secured credit facility and redeemed outstanding 7 ³/4% Senior Subordinated Notes due 2014 through a combination of the offering of $1.60 billion of 7 ³/4% Senior Subordinated Notes due 2018 and new term loan borrowings of $1.55 billion due 2017. See Note 11 to the Consolidated Financial Statements.

The total purchase price was allocated to the underlying assets acquired and liabilities assumed based upon management’s estimated fair values at the date of acquisition. The consolidated balance sheet at September 30, 2011 reflects the preliminary purchase price allocation for the business; therefore, the values attributed to the assets acquired and liabilities assumed in the consolidated financial statements are subject to adjustment. To the extent the purchase price exceeded the estimated fair value of the net identifiable tangible and intangible assets acquired, such excess was allocated to goodwill.

The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed at the transaction date (in thousands).

Assets acquired:
Current assets, excluding cash acquired	$	109,305
Property, plant and equipment		48,997
Intangible assets		433,000
Goodwill		864,004
Total assets acquired	$	1,455,306
Liabilities assumed:
Current liabilities	$	42,186
Deferred tax liabilities		115,591
Other noncurrent liabilities		31,837
Total liabilities assumed	$	189,614
Net assets acquired	$	1,265,692

The Company expects that the approximately $864.0 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

The results of operations of McKechnie Aerospace are included in the Company’s consolidated financial statements from the date of the transaction. The Company recorded net sales of $212.2 million from the date of acquisition through September 30, 2011. It is impracticable to determine a meaningful measure of the earnings of the acquired business from the date of acquisition through September 30, 2011 because certain McKechnie Aerospace plant facilities have been integrated into other TransDigm operations. Had the McKechnie acquisition and related financing transactions occurred at the beginning of the fiscal year ended September 30, 2010, unaudited pro forma consolidated results for the years ended September 30, 2011 and 2010 would have been as follows (in thousands, except per share data):

	Fiscal Years Ended September 30,
	2011		2010
Net sales	$	1,247,386	$	1,033,059
Net income applicable to common stock from continuing operations	$	217,575	$	44,614
Net earnings per share from continuing operations:
Basic and diluted	$	4.08	$	0.84

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The unaudited pro forma consolidated results are based on the Company’s historical financial statements and those of McKechnie Aerospace and do not necessarily indicate the results of operations that would have resulted had the acquisition actually been completed at the beginning of the applicable period presented. The pro forma financial information assumes that the companies were combined as of October 1, 2009. The pro forma results for the fiscal year ended September 30, 2010 reflect the business combination accounting effects from the acquisition including amortization charges from the acquired intangible assets, inventory purchase accounting adjustments charged to cost of sales as the inventory is sold, increase in interest expense associated with debt incurred to fund the acquisition, refinancing costs associated with the refinancing of the Company’s entire debt structure and acquisition-related transaction costs. The unaudited pro forma consolidated results do not give effect to the synergies of the acquisition and are not indicative of the results of operations in future periods.

Semco Instruments—On September 3, 2010, TransDigm Inc. completed the acquisition of Semco Instruments, Inc. (“Semco Instruments”) for approximately $73.6 million in cash, which includes a purchase price adjustment of $3.0 million paid in the first quarter of fiscal 2011. Semco Instruments manufactures proprietary, highly engineered components for major turbo-prop, turbo-fan, and turbo-shaft engines, which are primarily used on helicopters, business jets and selected regional airplanes. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $41 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

Dukes Aerospace—On December 2, 2009, Dukes Aerospace, Inc., a newly formed, wholly owned subsidiary of TransDigm Inc., acquired substantially all of the aerospace related assets and certain liabilities from Dukes, Inc. and GST Industries, Inc. (collectively “Dukes Aerospace”) for approximately $95.5 million in cash, which includes a purchase price adjustment of $0.2 million received in the third quarter of fiscal 2011. In addition, the agreement provides for potential earn-out payments up to a total of $60 million over four years based on the achievement of certain growth targets. The initial purchase price allocation included a fair value liability of $8.0 million recorded for the potential earn-out payments. During the third quarter of fiscal 2011, the Company reversed $3.0 million of the earn-out liability based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement. The reversal of earn-out liability is included in selling and administrative expenses in the consolidated statements of income for the fiscal year ended September 30, 2011. The Dukes Aerospace business supplies proprietary, highly engineered components primarily to the business jet, regional jet, and military aerospace markets, along with commercial and military helicopter markets. The products are comprised primarily of highly engineered valves and certain pumps, solenoids and related components. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $64 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Woodward HRT Product Line—On August 10, 2009, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired certain product line assets of Woodward HRT, Inc., a subsidiary of Woodward Governor Company (“Woodward HRT product line”) for approximately $48.7 million in cash, which includes a purchase price adjustment of $0.7 million paid in February 2010. The product line comprises a range of highly engineered fuel and pneumatic valves and surge suppressors, the majority of which are used on military rotary and fixed wing aircraft, all of which fit well with TransDigm’s overall business direction. Woodward Governor recently acquired this business as part of its acquisition of HR Textron, Inc. The Company expects that the $27 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Acme Aerospace—On July 24, 2009, TransDigm Inc. acquired all of the outstanding capital stock of Acme Aerospace, Inc. (“Acme”) for approximately $40.9 million in cash, which includes a purchase price adjustment of $0.2 million paid in October 2009. Acme is a designer and manufacturer of proprietary, highly engineered components to the commercial aerospace industry, comprising primarily fibrous nickel cadmium main ship batteries, battery chargers, battery back-up systems and power conversion equipment. These products fit well with TransDigm’s overall business direction. The Company expects that the $32 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

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Aircraft Parts Corporation—On December 16, 2008, TransDigm Inc. acquired all of the outstanding capital stock of Aircraft Parts Corporation (“APC”) for approximately $66.9 million in cash, net of a purchase price adjustment of $0.7 million received in November 2009. APC is a designer and manufacturer of starter generators, generator control units and related components for turbine engines, all of which fit well with TransDigm’s overall business direction. The Company expects that the $50 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

The Company accounted for the acquisitions of McKechnie Aerospace, Schneller, Talley Actuation, Semco Instruments, Dukes Aerospace, the Woodward HRT product line, Acme and APC, (collectively, the “Acquisitions”) using the acquisition method and included the results of operations of the Acquisitions in its consolidated financial statements from the effective date of each acquisition. The Company is in the process of obtaining a third-party valuation of certain tangible and intangible assets of Schneller and, therefore, the values attributed to those acquired assets in the consolidated financial statements are subject to adjustment. Pro forma net sales and results of operations for the acquisitions of Schneller, Talley Actuation, Semco Instruments, Dukes Aerospace, the Woodward HRT product line, Acme and APC had they occurred at the beginning of the applicable fiscal year ended September 30, 2011 or 2010, are not significant and, accordingly, are not provided.

The Acquisitions strengthen and expand the Company’s position to design, produce and supply highly-engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategies (obtaining profitable new business, improving our cost structure, and providing highly engineered value-added products to customers). The purchase price paid for each acquisition reflects the current earnings before interest, taxes, depreciation and amortization (EBITDA) and cash flows, as well as, the future EBITDA and cash flows expected to be generated by the business, which are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 30 years.

3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Consolidation—The accompanying consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of TD Group and subsidiaries. All significant intercompany balances and transactions have been eliminated.

Revenue Recognition and Related Allowances—Revenue is recognized from the sale of products when title and risk of loss passes to the customer, which is generally at the time of shipment. Substantially all sales are made pursuant to firm, fixed-price purchase orders received from customers. Provisions for estimated returns, uncollectible accounts and the cost of repairs under contract warranty provisions are provided for in the same period as the related revenues are recorded and are principally based on historical results modified, as appropriate, by the most current information available. Due to uncertainties in the estimation process, it is possible that actual results may vary from the estimates.

Shipping and Handling Costs—All shipping and handling costs are included in cost of sales in the Consolidated Statements of Income.

Research and Development Costs—The Company expenses research and development costs as incurred and classifies such amounts in selling and administrative expenses. The expense recognized for research and development costs for the years ended September 30, 2011, 2010 and 2009 was approximately $19.3 million, $13.9 million, and $12.6 million, respectively.

Cash Equivalents—The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.

Allowance for Uncollectible Accounts—The Company reserves for amounts determined to be uncollectible based on specific identification of losses and estimated losses based on historical experience. The allowance also

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incorporates a provision for the estimated impact of disputes with customers. The determination of the amount of the allowance for doubtful accounts is subject to significant levels of judgment and estimation by management. If circumstances change or economic conditions deteriorate or improve, the allowance for doubtful accounts could increase or decrease.

Inventories—Inventories are stated at the lower of cost or market. Cost of inventories is determined by the average cost and the first-in, first-out (FIFO) methods for all locations except CEF Industries, Inc. which determines the cost of inventories using the last-in, first-out (LIFO) method. Approximately 5% of the inventory was valued under the LIFO method at September 30, 2011. Provision for potentially obsolete or slow-moving inventory is made based on management’s analysis of inventory levels and future sales forecasts. In accordance with industry practice, all inventories are classified as current assets even though a portion of the inventories may not be sold within one year.

Property, Plant and Equipment—Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method over the following estimated useful lives: land improvements from 10 to 20 years, buildings and improvements from 5 to 30 years, machinery and equipment from 2 to 10 years and furniture and fixtures from 3 to 10 years.

Property, plant and equipment is assessed for potential impairment whenever indicators of impairment are present by determining whether the carrying value of the property can be recovered through projected, undiscounted cash flows from future operations over the property’s remaining estimated useful life. Any impairment recognized is the amount by which the carrying amount exceeds the fair value of the asset.

Debt Issue Costs, Premiums and Discounts—The cost of obtaining financing as well as premiums and discounts are amortized using the effective interest method over the terms of the respective obligations/securities.

Intangible Assets—Intangible assets consist of identifiable intangibles acquired or recognized in accounting for the acquisitions (trademarks, trade names, technology, order backlog and a license agreement) and goodwill. Goodwill and intangible assets that have indefinite useful lives (trademarks and trade names) are subject to annual impairment testing. Management determines fair value using a discounted future cash flow analysis or other accepted valuation techniques.

A two-step impairment test is used to identify potential goodwill impairment. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit (as defined) with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, goodwill is not considered impaired, and the second step of the goodwill impairment test is unnecessary. The second step measures the amount of impairment, if any, by comparing the carrying value of the goodwill associated with a reporting unit to the implied fair value of the goodwill derived from the estimated overall fair value of the reporting unit and the individual fair values of the other assets and liabilities of the reporting unit.

GAAP requires that the annual, and any interim, impairment assessment be performed at the reporting unit level. The reporting unit level is the operating subsidiary level for the Company. Substantially all goodwill was determined and recognized for each operating subsidiary pursuant to the accounting for the merger or acquisition as of the date of each transaction, and therefore the allocation of goodwill among reporting units was immaterial for purposes of the impairment assessment. With respect to acquisitions integrated into an existing operating subsidiary, any related goodwill is combined with goodwill of the operating subsidiary.

The impairment test for indefinite lived intangible assets consists of a comparison between their fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their fair values, an impairment loss will be recognized in an amount equal to the sum of any such excesses.

The Company assesses the recoverability of its amortizable intangible assets only when indicators of impairment are present by determining whether the amortization over their remaining lives can be recovered

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through projected, undiscounted cash flows from future operations. Amortization of amortizable intangible assets is computed using the straight-line method over the following estimated useful lives: technology from 20 to 22 years, order backlog over one year, and a license agreement over 20 years.

Prior to fiscal 2010, the annual impairment test of goodwill and indefinite-lived intangible assets was performed as of the last day of our fourth quarter. During fiscal 2010, the measurement date was changed to the first day of the fourth fiscal quarter. As a result of our growth and increase in the number of reporting units, we believe the change in our measurement date is preferable in order to provide additional time to quantify the fair value of our reporting units and to evaluate the results of the impairment testing.

Stock Option Plans—The Company records stock-based compensation measured using the fair value method of accounting. Compensation expense is recorded over the vesting periods of the options.

Income Taxes—The Company accounts for income taxes using an asset and liability approach. Deferred taxes are recorded for the difference between the book and tax basis of various assets and liabilities. A valuation allowance is provided when it is more likely than not that some or all of a deferred tax asset will not be realized.

Contingencies—During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings. While the Company is currently involved in certain legal proceedings, it believes the results of these proceedings will not have a material adverse effect on its financial condition, results of operations, or cash flows. The Company believes that its potential exposure to such legal actions is adequately covered by its aviation product and general liability insurance.

Estimates—The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Comprehensive Income (Loss)—The term “comprehensive income (loss)” represents the change in stockholders’ equity from transactions and other events and circumstances resulting from non-stockholder sources. The Company’s accumulated other comprehensive income or loss, consisting principally of fair value adjustments to its interest rate swaps (net of tax), cumulative foreign currency translation adjustments and pension liability adjustments (net of tax), is reported separately in the accompanying consolidated statements of changes in stockholders’ equity. See Note 20 to the Consolidated Financial Statements.

Segment Reporting—Management evaluates the Company as one reporting segment in the aerospace industry. The Company is engaged in the design, manufacture and sale of highly engineered aircraft components used in aerospace and defense applications through its wholly-owned subsidiaries. Substantially all of the Company’s operations are located within the United States.

Earnings per Share—Earnings per share information is determined using the two-class method, which includes the weighted-average number of common shares outstanding during the period and other securities that participate in dividends (“participating securities”). Our vested stock options are considered “participating securities” because they include non-forfeitable rights to dividends. In applying the two-class method, earnings are allocated to both common stock shares and participating securities based on their respective weighted-average shares outstanding for the period. Diluted earnings per share information may include the additional effect of other securities, if dilutive, in which case the dilutive effect of such securities is calculated using the treasury stock method.

4. RECENT ACCOUNTING PRONOUNCEMENTS

In May 2011, the Financial Accounting Standard Board (“FASB”) issued authoritative accounting guidance included in Accounting Standards Codification (ASC) Topic 820, “Fair Value Measurement.” This guidance amends the requirements for measuring fair value and disclosing information about fair value measurements and is effective for the Company during the first quarter of fiscal 2012. Upon adoption, the Company does not expect this standard to have a material impact on its financial condition or results of operations.

In June 2011, the FASB issued authoritative accounting guidance included in ASC Topic 220, “Comprehensive Income.” This guidance eliminates the option to report other comprehensive income and its

F-11

components in the statement of changes in equity. Companies can elect to present items of net income and other comprehensive income in one continuous statement or in two separate, but consecutive, statements. The Company is currently evaluating which method it will utilize to present items of net income and other comprehensive income. This presentation guidance is effective for the Company on October 1, 2012.

In September 2011, the FASB issued authoritative accounting guidance included in ASC Topic 350, “Intangibles—Goodwill and Other”. This guidance amends the requirements for goodwill impairment testing. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing the two-step impairment test is unnecessary. This guidance is effective for the Company for its annual goodwill impairment testing for the year ending September 30, 2013.

5. EARNINGS PER SHARE (TWO-CLASS METHOD)

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):

	Fiscal Years Ended September 30,
	2011			2010			2009
Numerator for earnings per share:
Net income from continuing operations	$	152,225		$	163,445		$	162,902
Less dividends paid on participating securities		(2,811	)		(30,313	)		—
		149,414			133,132			162,902
Net income from discontinued operations		19,909			—			—
Net income applicable to common stock—basic and diluted	$	169,323		$	133,132		$	162,902
Denominator for basic and diluted earnings per share under the two-class method:
Weighted average common shares outstanding		49,888			49,171			48,481
Vested options deemed participating securities		3,445			3,752			4,058
Total shares for basic and diluted earnings per share		53,333			52,923			52,539
Net earnings per share from continuing operations—basic and diluted	$	2.80		$	2.52		$	3.10
Net earnings per share from discontinued operations—basic and diluted		0.37			—			—
Net earnings per share	$	3.17		$	2.52		$	3.10

6. SALES AND TRADE ACCOUNTS RECEIVABLE

Sales—The Company’s sales and receivables are concentrated in the aerospace industry. TransDigm’s customers include: distributors of aerospace components; commercial airlines, large commercial transport and regional and business aircraft OEMs; various armed forces of the United States and friendly foreign governments; defense OEMs; system suppliers; and various other industrial customers.

One customer accounted for approximately 14%, 14% and 13% of the Company’s net sales for the years ended September 30, 2011, 2010 and 2009, respectively. Export sales to customers, primarily in Western Europe, Canada and Asia, were $305.5 million during fiscal 2011, $170.6 million during fiscal 2010 and $150.4 million during fiscal 2009.

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Information concerning the Company’s net sales by its major product offerings is as follows for the periods indicated below (in thousands):

	Years Ended September 30,
	2011		2010		2009
Mechanical/electro-mechanical actuators and controls	$	168,530	$	124,574	$	123,193
Ignition systems, engine sensors, harnesses and related components		153,919		111,834		96,758
Engineered latching and locking devices		150,111		33,746		34,663
Specialized valves		102,664		95,946		55,357
Rods and locking devices		99,556		31,438		29,328
AC/DC electric motors and generators		84,213		57,410		66,584
Specialized pumps		72,116		66,893		71,645
Power conditioning devices		58,683		57,917		57,957
Engineered connectors		57,803		43,945		46,697
NiCad batteries/chargers		57,757		45,583		25,337
Power, lighting and control		55,327		44,849		40,291
Audio systems		44,614		36,870		33,112
Lavatory hardware		38,280		27,753		27,825
Specialized cockpit displays		27,405		27,851		30,861
Elastomers		24,141		21,045		21,944
Other		10,902		—		—
Total	$	1,206,021	$	827,654	$	761,552

Trade Accounts Receivable—Trade accounts receivable consist of the following at September 30 (in thousands):

	2011			2010
Trade accounts receivable—gross	$	192,166		$	136,731
Allowance for uncollectible accounts		(2,873	)		(2,270	)
Trade accounts receivable—net	$	189,293		$	134,461

At September 30, 2011, approximately 10% of the Company’s trade accounts receivable was due from one customer. In addition, approximately 30% of the Company’s trade accounts receivable was due from entities that principally operate outside of the United States. Credit is extended based on an evaluation of each customer’s financial condition and collateral is generally not required.

7. INVENTORIES

Inventories consist of the following at September 30 (in thousands):

	2011			2010
Raw materials and purchased component parts	$	160,402		$	112,249
Work-in-progress		85,612			61,487
Finished Goods		43,192			31,251
Total		289,206			204,987
Reserves for excess and obsolete inventory and LIFO		(23,889	)		(16,231	)
Inventories—net	$	265,317		$	188,756

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8. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following at September 30 (in thousands):

	2011			2010
Land and improvements	$	40,912		$	29,734
Buildings and improvements		58,692			43,314
Machinery, equipment and other		137,124			99,052
Construction in progress		8,250			5,012
Total		244,978			177,112
Accumulated depreciation		(94,178	)		(77,499	)
Property, plant and equipment—net	$	150,800		$	99,613

9. INTANGIBLE ASSETS

Intangibles assets subject to amortization consist of the following at September 30 (in thousands):

	2011						2010
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Technology	$	546,726	$	75,426	$	471,300	$	257,913	$	52,781	$	205,132
Order backlog		24,799		17,895		6,904		23,613		21,883		1,730
License agreement		9,373		4,336		5,037		9,373		3,804		5,569
Other		1,600		1,417		183		1,600		1,193		407
Total	$	582,498	$	99,074	$	483,424	$	292,499	$	79,661	$	212,838

Information regarding the amortization expense of amortizable intangible assets is detailed below (in thousands):

Aggregate Amortization Expense:

Years ended September 30,
2011	$	40,368
2010		15,079
2009		13,928

Estimated Amortization Expense:

Years ending September 30,
2012	$	34,458
2013		27,561
2014		27,561
2015		27,561
2016		27,561

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Intangible assets acquired during the year ended September 30, 2011 were as follows (in thousands):

	Cost		Amortization Period
Intangible assets not subject to amortization:
Goodwill	$	1,129,145		None
Trademarks and trade names		174,600		None
Intangible assets subject to amortization:
Technology		314,900		20 years
Order backlog		24,754		1 year
		339,654		18.6 years
Total	$	1,643,399

The changes in the carrying amount of goodwill for the fiscal years ended September 30, 2010 and 2011 were as follows (in thousands):

Balance at September 30, 2009	$	1,462,310
Goodwill acquired during the year (Note 2)		107,065
Other		2,289
Balance at September 30, 2010		1,571,664
Goodwill acquired during the year (Note 2)		1,129,145
Divestitures (Note 21)		(103,880	)
Other		(1,182	)
Balance at September 30, 2011	$	2,595,747

10. ACCRUED LIABILITIES

Accrued liabilities consist of the following at September 30 (in thousands):

	2011		2010
Compensation and related benefits	$	24,824	$	18,146
Interest		37,065		17,747
Product warranties		8,722		8,345
Other		49,701		24,548
Total	$	120,312	$	68,786

Product Warranties—The Company provides limited warranties in connection with the sale of its products. The warranty period for products sold, which varies among the Company’s operations, is typically less than two years but can be in the range from 90 days to six years. A provision for the estimated cost to repair or replace the products is recorded at the time of sale and periodically adjusted to reflect actual experience. The following table presents a reconciliation of changes in the product warranty liability for the periods indicated below (in thousands):

	Years Ended September 30,
	2011			2010			2009
Liability balance at beginning of period	$	8,345		$	9,419		$	6,255
Product warranty provision		2,217			880			3,921
Warranty costs incurred		(2,501	)		(2,457	)		(3,004	)
Acquisitions		661			503			2,247
Liability balance at end of period	$	8,722		$	8,345		$	9,419

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11. DEBT

The Company’s long-term debt consists of the following at September 30 (in thousands):

	2011		2010
Term loans	$	1,538,375	$	780,000
Senior Subordinated Notes due 2018		1,600,000		—
Senior Subordinated Notes due 2014		—		991,646
		3,138,375		1,771,646
Less current portion		15,500		—
Long-term debt	$	3,122,875	$	1,771,646

Revolving Credit Facility and Term Loan—In December 2010, TD Group’s wholly owned subsidiary, TransDigm Inc., entered into a senior secured credit facility, which consisted of a $1.55 billion term loan facility and a $245 million revolving credit facility (collectively, the “Existing Senior Secured Credit Facility”). The proceeds of the term loan were used to pay the purchase price of and related transaction expenses associated with the acquisition of McKechnie Aerospace and repay a portion of the amounts outstanding under the previous senior secured credit facility. The remaining amount of the previous senior secured credit facility was repaid from a portion of the 7 ³/4% Senior Subordinated Notes due 2018 (the “2018 Notes”) proceeds.

On February 14, 2011, TransDigm Inc. entered into a new senior secured credit facility which provides for a $1.55 billion term loan facility (the “New Senior Secured Credit Facility”), which was fully drawn on February 14, 2011. The New Senior Secured Credit Facility replaced the term loan under the Existing Senior Secured Credit Facility and modified certain terms of the original agreement including extending the maturity date of the term loan and modifying the interest rate provisions.

On March 25, 2011, TransDigm entered into Amendment No. 1 (the “Amendment”) to the Existing Senior Secured Credit Facility. The Amendment provides for a modification to certain terms of the permitted indebtedness covenant contained in the Existing Senior Secured Credit Facility to modify the requirements for incurring certain additional senior indebtedness.

Under the terms of the New Senior Secured Credit Facility, TransDigm is entitled on one or more occasions, subject to the satisfaction of certain conditions, to request additional term loans under the New Senior Secured Credit Facility in the aggregate principal amount of up to $500 million (less any increase in the commitments under the revolving credit facility and/or additional term loans under the term loan facility under the Existing Senior Secured Credit Facility) to the extent that existing or new lenders agree to provide such additional term loans.

At September 30, 2011, the Company had $8.0 million letters of credit outstanding and $237.0 million of borrowings available under the Existing Senior Secured Credit Facility, as amended. Under the Existing Senior Secured Credit Facility, the revolving credit facility matures in December 2015.

Under the New Senior Secured Credit Facility, the term loan matures in February 2017. The term loan under the New Senior Secured Credit Facility requires quarterly principal payments of $3.9 million that began on March 31, 2011.

The interest rates per annum applicable to the term loan under the New Senior Secured Credit Facility will be, at TransDigm’s option, equal to either an alternate base rate or an adjusted LIBO rate for one, two, three or six-month (or to the extent agreed to by each relevant lender, nine or twelve-month) interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The adjusted LIBO rate is subject to a floor of 1%. At September 30, 2011, the applicable interest rate on the term loan was 4.0%.

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On June 27, 2011, the Company entered into three forward-starting interest rate swap agreements beginning December 31, 2012 to hedge the variable interest rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million through June 30, 2015. These forward-starting interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the New Senior Secured Credit Facility to a fixed rate of 5.17% over the term of the interest rate swap agreements.

Under the terms of the New Senior Secured Credit Facility, the Company is required to pay the administrative agent certain fees. In addition, under the Existing Senior Secured Credit Facility, on the last day of each calendar quarter the Company is required to pay a commitment fee equal to the applicable rate per annum in effect from time to time of any unused commitments under the revolving credit line and certain other fees in respect of letters of credit that may be outstanding thereunder from time to time.

All of the indebtedness outstanding under the credit facilities is guaranteed by TD Group and all of TransDigm’s current and future domestic restricted subsidiaries (other than immaterial subsidiaries), and is secured by a first priority security interest in substantially all of the existing and future property and assets, including inventory, equipment, general intangibles, intellectual property, investment property and other personal property (but excluding leasehold interests and certain other assets) of TransDigm and all of TransDigm’s existing and future domestic restricted subsidiaries (other than immaterial subsidiaries), and a first priority pledge of the capital stock of TransDigm and its domestic subsidiaries and 65% of the voting capital stock of certain of TransDigm’s foreign subsidiaries.

The credit facilities contain certain covenants that limit the ability of TD Group, TransDigm and TransDigm’s restricted subsidiaries to, among other things, incur or guarantee additional indebtedness or issue preferred stock, pay distributions on, redeem or repurchase capital stock or redeem or repurchase subordinated debt, make investments, sell assets, enter into agreements that restrict distributions or other payments from restricted subsidiaries to TransDigm, incur or suffer to exist liens securing indebtedness, consolidate, merge or transfer all or substantially all of their assets, and engage in transactions with affiliates. At September 30, 2011, TransDigm was in compliance with all of the covenants contained in the credit facilities.

The term loan under the New Senior Secured Credit Facility requires mandatory prepayments of principal based on certain percentages of Excess Cash Flow (as therein defined), commencing 90 days after the end of each fiscal year, commencing with the fiscal year ending September 30, 2012, subject to certain exceptions. In addition, subject to certain exceptions (including, with respect to asset sales, the reinvestment in productive assets), TransDigm will be required to prepay the loans outstanding under the term loan facility at 100% of the principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of certain asset sales and issuance or incurrence of certain indebtedness. In addition, if, prior to February 14, 2012, the principal amount of the term loans are (i) prepaid substantially concurrently with the incurrence by TD Group, TransDigm or any of its subsidiaries of new bank loans that have an effective yield lower than the yield in effect on the term loans so prepaid or (ii) received by a lender due to a mandatory assignment following the failure of such lender to consent to an amendment of the New Senior Secured Credit Facility that has the effect of reducing the effective interest rate with respect to the term loans, such prepayment or receipt shall be accompanied by a premium of 1.0%.

Senior Subordinated Notes—In December 2010, TransDigm issued $1.6 billion in aggregate principal amount of its 2018 Notes at an issue price of 100% of the principal amount. The 2018 Notes represent unsecured obligations of TransDigm Inc. ranking subordinate to TransDigm Inc.’s senior debt, as defined in the indenture governing the 2018 Notes. Interest under the 2018 Notes is payable semi-annually.

Prior to December 15, 2013, TransDigm is permitted to redeem specified percentages of the 2018 Notes from the proceeds of equity offerings at a redemption price of 107.75%, plus accrued and unpaid interest. The 2018 Notes are redeemable by TransDigm, in whole or in part, at specified redemption prices, which decline from 103.875% to 100% over the remaining term of the 2018 Notes, plus accrued and unpaid interest. If a change in control of the Company occurs, the holders of the 2018 Notes will have the right to demand that TransDigm

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redeem the 2018 Notes at a purchase price equal to 101% of the principal amount of the 2018 Notes plus accrued and unpaid interest. The 2018 Notes contain many of the same restrictive covenants included in the New Senior Secured Credit Facility. TransDigm is in compliance with all of the covenants contained in the 2018 Notes.

TransDigm utilized a portion of the proceeds from the 2018 Notes to purchase its 7 ³/4% Senior Subordinated Notes due 2014 (the “2014 Notes”).

The Company recorded refinancing costs of $72.5 million during the fiscal year ended September 30, 2011 representing charges resulting from the refinancing of TransDigm’s entire debt structure. The charge for the fiscal year ended September 30, 2011 consisted of the premium of $41.9 million paid to redeem the 2014 Notes, the write-off of debt issue costs and unamortized note premium and discount of $25.7 million, and the settlement of the interest rate swap agreement and other expenses of $4.9 million.

At September 30, 2011, future maturities of long-term debt are as follows (in thousands):

Years ended September 30,
2012	$	15,500
2013		15,500
2014		15,500
2015		15,500
2016		15,500
Thereafter		3,060,875
	$	3,138,375

Special Cash Dividend Payment—In October 2009, TransDigm made a special cash dividend to its stockholders of $7.65 per share and cash dividend equivalents payments (“Dividend Equivalent Payments”) to holders of options to purchase its common stock from the net proceeds of the $425 million Senior Subordinated Notes due 2014 issued in October 2009. After the payment of debt issue fees and expenses, the net proceeds amounted to approximately $404.5 million. The special cash dividend and Dividend Equivalent Payments of $404.9 million were paid in the first quarter of fiscal 2010 and Dividend Equivalent Payments of $2.8 million were paid in the first quarter of fiscal 2011. The $425 million of 2014 Notes were included in the tender offer made in conjunction with the 2018 Notes issuance.

12. RETIREMENT PLANS

Defined Contribution Plans—The Company sponsors certain defined contribution employee savings plans that cover substantially all of the Company’s non-union employees. Under certain plans, the Company contributes a percentage of employee compensation and matches a portion of employee contributions. The cost recognized for such contributions for the years ended September 30, 2011, 2010 and 2009 was approximately $3.5 million, $2.6 million and $2.4 million, respectively.

Defined Benefit Pension Plans—The Company has three non-contributory defined benefit pension plans. The Company’s funding policy is to contribute actuarially determined amounts allowable under Internal Revenue Service regulations for the qualified plans. The Company uses a September 30th measurement date for its defined benefit pension plans.

The Company has two qualified, non-contributory defined benefit pension plans, which together cover certain union employees. The plans provide benefits of stated amounts for each year of service. The plan assets as of September 30, 2011 and 2010 were approximately $6.7 million. The Company’s accumulated benefit obligation for its defined benefit pension plans at September 30, 2011 and 2010 was $9.7 million and $9.6 million, respectively. The total liability recognized at September 30, 2011 and 2010 was $3.0 million and

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$2.9 million, respectively. The net periodic pension cost recognized in the Consolidated Statements of Income was $0.4 million for the year ended September 30, 2011 and $0.3 million for the years ended September 30, 2010 and 2009.

The Company has a non-qualified, non-contributory defined benefit pension plan, which covers certain retired employees of a business acquired during the year ended September 30, 2011. The plan is unfunded and provides defined benefits based on the final average salary of the employees as defined in the plan. The projected benefit obligation for this defined benefit pension plan and the total liability recognized in the Consolidated Balance Sheet at September 30, 2011 was approximately $7.9 million.

13. INCOME TAXES

The Company’s income tax provision on income from continuing operations consists of the following for the periods shown below (in thousands):

	Fiscal Years Ended September 30,
	2011		2010		2009
Current
Federal	$	50,105	$	78,591	$	71,700
State		7,109		6,899		7,600
Foreign		1,310		—		—
		58,524		85,490		79,300
Deferred		18,676		1,900		8,800
	$	77,200	$	87,390	$	88,100

The differences between the income tax provision on income from continuing operations at the federal statutory income tax rate and the tax provision shown in the accompanying consolidated statements of income for the periods shown below are as follows (in thousands):

	Fiscal Years Ended September 30,
	2011			2010			2009
Tax at statutory rate of 35%	$	80,299		$	87,792		$	87,851
State and local income taxes, net of federal benefit		3,576			4,298			5,524
Domestic manufacturing deduction		(2,772	)		(3,981	)		(4,280	)
Research and development credits		(2,303	)		(300	)		(1,650	)
Other—net		(1,600	)		(419	)		655
Income tax provision	$	77,200		$	87,390		$	88,100

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The components of the deferred taxes consist of the following at September 30 (in thousands):

	2011			2010
Deferred tax assets:
Net operating losses	$	16,500		$	6,125
Employee benefits, compensation and other accrued obligations		16,059			11,186
Inventory		10,715			4,960
Environmental		7,412			—
Product warranties		3,534			3,121
Interest rate swaps		2,087			1,440
Other accrued liabilities		4,692			3,688
Total		60,999			30,520
Less: Valuation allowance		(15,874	)		(6,097	)
Total deferred tax assets		45,125			24,423
Deferred tax liabilities:
Intangible assets		302,273			163,122
Property, plant and equipment		22,459			13,563
Other		—			1,126
Total deferred tax liabilities		324,732			177,811
Total net deferred tax liabilities	$	279,607		$	153,388

At September 30, 2011, the Company had state and United Kingdom net tax loss carryforwards which generate a tax benefit of approximately $16.5 million that expire in various years from 2013 to 2031. A valuation allowance has been established equal to the amount of the net operating losses that the Company believes will not be utilized.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, various state and local jurisdictions as well as foreign jurisdictions located in Belgium, Malaysia, Mexico, France, Singapore and the United Kingdom. The Company is subject to U.S. federal examination for the 2008, 2009 and 2010 years.

The Company has not provided an estimate for any U.S. or additional foreign taxes on undistributed earnings of foreign subsidiaries that might be payable if these earnings were repatriated since the Company considers these amounts to be permanently reinvested.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	2011			2010
Balance at beginning of period	$	1,832		$	3,253
Additions based on tax positions related to the current year		129			40
Reductions for tax positions of prior years		(760	)		(1,461	)
Acquisitions		6,367			—
Balance at end of period	$	7,568		$	1,832

Unrecognized tax benefits at September 30, 2011 and 2010, the recognition of which would have an effect on the effective tax rate for each fiscal year, amounted to $7.0 million and $1.3 million, respectively. The Company classifies all income tax related interest and penalties as income tax expense, which were not significant for the years ended September 30, 2011, 2010 and 2009. As of September 30, 2011 and 2010, the Company accrued $1.2 million and $1.0 million, respectively, for the potential payment of interest and penalties. The Company anticipates no significant changes to its total unrecognized tax benefits through fiscal 2012.

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14. ENVIRONMENTAL LIABILITIES

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. At certain facilities acquired in connection with the acquisition of McKechnie Aerospace or third-party sites utilized by subsidiaries of McKechnie Aerospace, subsidiaries of the Company have been identified as potentially responsible parties under the federal Superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company’s environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company’s prior experience and professional judgment of the Company’s environmental specialists. Estimates of the Company’s environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

Accordingly, as investigation and remediation proceed, it is likely that adjustments in the Company’s accruals will be necessary to reflect new information. The amounts of any such adjustments could have a material adverse effect on the Company’s results of operations or cash flows in a given period. Based on currently available information, however, the Company does not believe that future environmental costs in excess of those accrued with respect to sites for which the Company has been identified as a potentially responsible party are likely to have a material adverse effect on the Company’s financial condition.

Environmental liabilities are recorded when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when the Company has recommended a remedy or has committed to an appropriate plan of action. The liabilities are reviewed periodically and, as investigation and remediation proceed, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not reduced by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites.

The Company’s consolidated balance sheet includes the following for environmental remediation obligations (in thousands):

	September 30, 2011
Accrued liabilities	$	1,000
Other non-current liabilities		18,888
Total	$	19,888

15. CAPITAL STOCK

Capital Stock—Authorized capital stock of TD Group consists of 224,400,000 shares of $.01 par value common stock and 149,600,000 shares of $.01 par value preferred stock. The total number of shares of common stock outstanding at September 30, 2011 and 2010 was 50,829,276 and 49,928,241, respectively. There were no shares of preferred stock outstanding at September 30, 2011 and 2010. The terms of the preferred stock have not been established.

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On August 22, 2011, the Board of Directors authorized a common share repurchase program, which was announced on August 23, 2011. Under the terms of the program, the Company may purchase up to a maximum aggregate value of $100 million of its shares of common stock. At September 30, 2011, no shares were repurchased under this program. The program replaces the repurchase program announced on October 23, 2008, under which the Company previously repurchased 494,100 shares of its common stock at a gross cost of approximately $15.2 million.

16. STOCK-BASED COMPENSATION

The Company’s stock compensation plans are designed to assist the Company in attracting, retaining, motivating and rewarding key employees, directors or consultants, and promoting the creation of long-term value for stockholders by closely aligning the interests of these individuals with those of the Company’s stockholders. The Company’s stock compensation plans provide for the granting of stock options, restricted stock and other stock-based incentives.

The following table shows the expense recognized by the Company for stock-based compensation (in thousands):

	Fiscal Years Ended September 30,
	2011		2010		2009
Stock option compensation expense:
Performance vested stock options	$	12,568	$	6,693	$	5,695
Time vested stock options		—		—		87
Restricted stock award amortization		6		11		31
	$	12,574	$	6,704	$	5,813

The weighted-average grant date fair value of options granted during the fiscal years ended September 30, 2011, 2010 and 2009 was $33.51, $18.83 and $10.45, respectively.

Compensation expense is recognized based upon probability assessments of awards that are expected to vest in future periods. Such probability assessments are subject to revision and, therefore, unrecognized compensation expense is subject to future changes in estimate. As of September 30, 2011, there was approximately $17.0 million of total unrecognized compensation expense related to non-vested awards expected to vest, which is expected to be recognized over a weighted-average period of three years.

The fair value of the Company’s employee stock options was estimated at the date of grant using a Black-Scholes-Merton option-pricing model with the following weighted average assumptions for all options granted during the fiscal years ended:

	Fiscal Years Ended September 30,
	2011	2010	2009
Risk-free interest rate	1.67% to 2.53%	2.45% to 2.96%	1.82% to 2.68%
Expected life of options	6 years	6 years	6 years
Expected dividend yield of stock	—	—	—
Expected volatility of stock	40%	40%	35%

The risk-free interest rate is based upon the Treasury bond rates as of the grant date. The average expected life of stock-based awards is based on vesting schedules and contractual terms. Expected volatility of stock was calculated using a rate based upon the historical volatility of publicly traded companies in the Company’s peer group in the aerospace industry. This was used because TD Group’s common stock has only been publicly traded since March 2006. Notwithstanding the special cash dividend paid in October 2009, the Company historically has not paid regular cash dividends and does not anticipate paying regular cash dividends in future periods; thus, no dividend rate assumption is used.

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The total fair value of shares vested during fiscal years ended September 30, 2011, 2010, and 2009 was $7.8 million, $4.6 million and $4.9 million, respectively.

2006 Stock Incentive Plan

In conjunction with the consummation of the initial public offering, a 2006 stock incentive plan was adopted by TD Group. In July 2008 and March 2011, the plan was amended to increase the number of shares available for issuance thereunder. TD Group has reserved 8,119,668 shares of its common stock for issuance to key employees, directors or consultants under the plan. Awards under the plan may be in the form of options, restricted stock or other stock-based awards. Options granted under the plan will expire no later than the tenth anniversary of the applicable date of grant of the options, and will have an exercise price of not less than the fair market value of our common stock on the date of grant. Restricted stock granted under the plan vests over three years.

On February 24, 2011, the 2006 stock incentive plan was amended to add a market based “sweep,” on all outstanding options under the 2006 stock incentive plan which provides that all options will accelerate and become fully vested if the closing price of the Company’s common stock exceeds $160 per share on any 60 trading days during any consecutive 12-month period.

During the fiscal year ended September 30, 2011, 1,420 shares of common stock were issued with a weighted-average grant date fair value of $84.30.

Restricted Stock—The following table summarizes activity for restricted stock awards for the fiscal year ended September 30, 2011:

	Number of Shares			Weighted-Average Grant Date Fair Value
Outstanding at September 30, 2010		264		$	37.97
Granted		—			—
Vested		(220	)		37.97
Forfeited		(44	)		37.97
Outstanding at September 30, 2011		—		$	—

Performance Vested Stock Options—All of the options granted through September 30, 2011 under the 2006 stock incentive plan have been pursuant to an equity incentive program adopted by the Company in 2008. Under the 2008 equity incentive program, all of the options granted will vest based on the Company’s achievement of established operating performance goals. The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,979,825		$	28.89
Granted		1,786,250			79.55
Exercised		(32,848	)		30.62
Forfeited		(97,142	)		57.18
Outstanding at September 30, 2011		4,636,085		$	47.80		8.0 years	$	157,024,199
Expected to vest		1,769,386		$	42.39		7.8 years	$	69,500,110
Exercisable at September 30, 2011		1,327,095		$	30.98		8.0 years	$	67,270,446

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At September 30, 2011, 3,400,151 remaining shares were available for award under TD Group’s 2006 stock incentive plan.

2003 Stock Option Plan

Certain executives and key employees of the Company were granted stock options under TD Group’s 2003 stock option plan. Upon the closing of the acquisition of the Company by Warburg Pincus in 2003, certain employees rolled over certain then-existing options to purchase shares of common stock of TransDigm Holdings. These employees were granted rollover options to purchase an aggregate of 3,870,152 shares of common stock of TD Group (after giving effect to the 149.60 for 1.00 stock split effected on March 14, 2006). All rollover options granted were fully vested on the date of grant. In addition to shares of common stock reserved for issuance upon the exercise of rollover options, an aggregate of 5,469,301 shares of TD Group’s common stock were reserved for issuance upon the exercise of new management options. In general, approximately 20% of all new management options vested based on employment service or a change in control. These time vested options have a graded vesting schedule of up to four years. Approximately 80% of all new management options vested (i) based upon the satisfaction of specified performance criteria, which is annual and cumulative EBITDA As Defined targets through 2008, or (ii) upon the occurrence of a change in control if the Investor Group (defined as Warburg Pincus and the other initial investors in TD Group) received a minimum specified rate of return. Unless terminated earlier, the options expire ten years from the date of grant. All of the outstanding performance options were vested as of September 30, 2011.

TD Group has reserved a total of 9,339,453 shares of its common stock for issuance to the Company’s employees under the plan, 9,261,624 of which had been issued as of September 30, 2011.

Time Vested Stock Options—The following table summarizes activity, pricing and other information for the Company’s time vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		703,129		$	10.11
Granted		—			—
Exercised		(128,104	)		9.11
Forfeited		—			—
Outstanding at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284
Exercisable at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284

Performance Vested Stock Options—The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,166,628		$	11.43
Granted		—			—
Exercised		(645,443	)		10.40
Forfeited		—			—
Outstanding at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713
Exercisable at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713

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Rollover Option Awards—The following table summarizes the activity, pricing and other information for the Company’s rollover option award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		117,436		$	4.00
Granted		—			—
Exercised		(33,000	)		5.35
Forfeited		—			—
Outstanding at September 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895
Exercisable at Septmeber 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895

The total intrinsic value of time, performance and rollover options exercised during the fiscal years ended September 30, 2011, 2010 and 2009 was $63.0 million, $19.0 million and $26.4 million, respectively.

Options Not Pursuant to a Shareholder Approved Plan

In addition to the stock options issued under the 2003 stock option plan and 2006 stock incentive plan, two members of the Company’s Board of Directors were also granted stock options of TD Group. Of the 134,040 options issued under these agreements, 48,096 remain outstanding with an exercise price of $6.68. All of such options were vested as of September 30, 2011.

Dividend Equivalent Plans

Pursuant to the Third Amended and Restated TransDigm Group Incorporated 2003 Stock Option Plan Dividend Equivalent Plan and the Second Amended and Restated TransDigm Group Incorporated 2006 Stock Incentive Plan Dividend Equivalent Plan, all of the options granted under the 2003 stock option plan and the 2006 stock incentive plan are entitled to certain dividend equivalent payments in the event of the declaration of a dividend by the Company. Options granted outside the plans to directors are also entitled to comparable dividend equivalents. The Company declared a special dividend of $7.65 per share in October 2009. See Note 11. As a result, holders of outstanding vested options received dividend equivalents of approximately $33.1 million in the aggregate. In addition, to the extent unvested options outstanding on the dividend declaration date vest, such options will be entitled to receive a dividend equivalent payment in the amount of $7.65 per share at the time of vesting.

17. LEASES

TransDigm leases certain manufacturing facilities, equipment and vehicles with rental payments required through December 2020. Rental expense during the years ended September 30, 2011, 2010 and 2009 was $5.9 million, $4.2 million and $3.3 million, respectively.

Future minimum rental commitments at September 30, 2011 under operating leases having initial or remaining non-cancelable lease terms exceeding one year are $4.7 million in fiscal 2012, $3.3 million in fiscal 2013, $2.6 million in fiscal 2014, $1.8 million in fiscal 2015, $1.4 million in fiscal 2016, and $5.9 million thereafter.

18. FAIR VALUE MEASUREMENTS

The following tables present our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for

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identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following summarizes the carrying amounts and fair values of financial instruments as of September 30 (in thousands):

	Level		2011				2010
			Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents		1	$	376,183	$	376,183	$	234,112	$	234,112
Liabilities:
Interest rate swaps(1)		2		5,600		5,600		—		—
Interest rate swap(2)		2		—		—		3,865		3,865
Long-term debt:
Term loans		2		1,538,375		1,496,000		780,000		762,000
7 3/4% Senior Subordinated Notes due 2018		1		1,600,000		1,616,000		—		—
7 3/4% Senior Subordinated Notes due 2014		1		—		—		991,646		1,010,000

(1) Included in Other non-current liabilities on the Consolidated Balance Sheet.

(2) Included in Accrued liabilities on the Consolidated Balance Sheet.

Interest rate swaps are measured at fair value using quoted market prices for the swap interest rate indexes over the term of the swap discounted to present value versus the fixed rate of the contract. The estimated fair value of the Company’s term loans was based on information provided by the agent under the Company’s Senior Secured Credit Facility. The estimated fair value of the Company’s 7 ³/4% Senior Subordinated Notes was based upon quoted market prices.

19. DERIVATIVES AND HEDGING ACTIVITIES

The Company is exposed to, among other things, the impact of changes in interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks, and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties.

Interest rate swap agreements are used to manage interest rate risk associated with floating-rate borrowings under our New Senior Secured Credit Facility. The interest rate swap agreements utilized by the Company effectively modify the Company’s exposure to interest rate risk by converting a portion of the Company’s floating-rate debt to a fixed rate basis through the expiration date of the interest rate swap agreements, thereby reducing the impact of interest rate changes on future interest expense. These agreements involve the receipt of floating rate amounts in exchange for fixed rate interest payments over the term of the agreements without an exchange of the underlying principal amount. These derivative instruments qualify as effective cash flow hedges under GAAP. For these hedges, the effective portion of the gain or loss from the financial instruments is initially reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affects earnings.

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At September 30, 2011, three forward-starting interest rate swap agreements were in place to swap variable rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million. Beginning December 31, 2012, these interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the New Senior Secured Credit Facility to a fixed rate of 5.17% (2.17% plus the 3% margin percentage) through June 30, 2015.

At September 30, 2010, an agreement was in place to swap variable interest rates on the previous senior secured credit facility for a fixed interest rate on a notional amount of $300 million through March 23, 2011. This interest rate swap agreement effectively converted the variable rate interest on the notional amount of the previous senior secured credit facility to a fixed rate of 5.04% (3.04% plus the 2% margin percentage) over the term of the agreement. The interest rate swap agreement was terminated in December 2010 in conjunction with the repayment of the outstanding term loan balance under the previous senior secured credit facility.

20. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Accumulated other comprehensive income (loss) consists of the following at September 30 (in thousands):

	2011			2010
Interest rate swap agreements, net of taxes of $2.1 million for 2011 and $1.4 million for 2010	$	(3,500	)	$	(2,423	)
Cumulative foreign currency translation adjustments		1,795			297
Pension liability adjustments, net of taxes of $1.0 million for 2011 and 2010		(1,572	)		(1,674	)
Total	$	(3,277	)	$	(3,800	)

21. DISCONTINUED OPERATIONS

On March 9, 2011, the Company completed the divestiture of its fastener business for approximately $239.6 million in cash, subject to adjustments based on the level of working capital as of the closing date. The Company recorded a gain on sale of the fastener business of approximately $23.6 million, net of tax of $56.5 million. This business, which was acquired as part of the McKechnie Aerospace acquisition, is made up of Valley-Todeco, Inc. and Linread Ltd. The business designs and manufactures fasteners, fastening systems and bearings for commercial, military and general aviation aircraft.

On April 7, 2011, the Company completed the divestiture of Aero Quality Sales (“AQS”) to Satair A/S for approximately $31.8 million in cash, which includes a $1.8 million working capital adjustment received in the third quarter of fiscal 2011. The Company recorded a loss on the sale of AQS of approximately $1.6 million, net of tax of $6.2 million. AQS, which was acquired as part of the McKechnie Aerospace acquisition, is a distributor and service center of aircraft batteries and battery support equipment. The Company’s Chairman and Chief Executive Officer, W. Nicholas Howley, was a director of Satair A/S from 2006 through October 2011.

The sales of the fastener business and AQS have been accounted for as discontinued operations and accordingly the consolidated statements of income have classified the operating results to reflect discontinued operations presentation. The following is the summarized operating results for the fastener business and AQS for the fiscal year ended September 30, 2011 (in thousands).

	Fiscal Year Ended September 30, 2011
Net sales	$	24,058
Loss from discontinued operations before income taxes	$	(2,917	)
Income tax benefit		794
Loss from discontinued operations		(2,123	)
Net gain on sales of discontinued operations, net of tax		22,032
Income from discontinued operations	$	19,909

F-27

22. QUARTERLY FINANCIAL DATA (UNAUDITED)

	First Quarter Ended January 1, 2011			Second Quarter Ended April 2, 2011		Third Quarter Ended July 2, 2011			Fourth Quarter Ended September 30, 2011
	(in thousands, except per share amounts)
Year Ended September 30, 2011(1):
Net sales	$	233,552		$	304,307	$	325,209		$	342,953
Gross profit		127,146			157,874		183,149			193,016
Net income (loss) from continuing operations	$	(7,153	)	$	36,697	$	58,368		$	64,313
Net income (loss) from discontinued operations		(205	)		19,120		(2,088	)		3,082
Net income (loss)	$	(7,358	)	$	55,817	$	56,280		$	67,395
Net earnings (loss) per share from continuing operations—basic and diluted	$	(0.19	)	$	0.69	$	1.10		$	1.20
Net earnings (loss) per share from discontinued operations—basic and diluted		—			0.35		(0.04	)		0.06
Net earnings (loss) per share—basic and diluted	$	(0.19	)	$	1.04	$	1.06		$	1.26

(1) Restated to reflect amounts reclassified to discontinued operations due to the Company’s sale of the fastener business and AQS (see Note 21).

	First Quarter Ended January 2, 2010		Second Quarter Ended April 3, 2010		Third Quarter Ended July 3, 2010		Fourth Quarter Ended September 30, 2010
	(in thousands, except per share amounts)
Year Ended September 30, 2010
Net sales	$	184,278	$	206,077	$	214,182	$	223,117
Gross profit		103,059		115,203		122,433		132,371
Net income		30,758		38,045		44,005		50,635
Net earnings per share—basic and diluted	$	0.01	$	0.72	$	0.83	$	0.96

23. SUPPLEMENTAL GUARANTOR INFORMATION

TransDigm’s 7 ³/4% senior subordinated notes due 2018 (the “2018 Notes”) (see Note 11) are jointly and severally guaranteed, on a senior subordinated basis, by TD Group and TransDigm Inc.’s domestic restricted subsidiaries, as defined in the Indenture. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of September 30, 2011 and September 30, 2010 and its statements of income and cash flows for the fiscal years ended September 30, 2011, 2010 and 2009 for (i) TransDigm Group on a parent only basis with its investment in subsidiaries recorded under the equity method, (ii) TransDigm Inc. including its directly owned operations and non-operating entities, (iii) the Subsidiary Guarantors on a combined basis, (iv) Non-Guarantor Subsidiaries after December 14, 2010 and (v) the Company on a consolidated basis.

F-28

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2011

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	5,695	$	360,074	$	2,115	$	8,299		$	—		$	376,183
Trade accounts receivable—Net		—		11,183		170,420		8,484			(794	)		189,293
Inventories		—		23,311		233,726		8,264			16			265,317
Deferred income taxes		—		23,248		7,596		—			—			30,844
Prepaid expenses and other		—		2,571		5,451		633			—			8,655
Total current assets		5,695		420,387		419,308		25,680			(778	)		870,292
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		805,254		3,746,531		1,557,736		(8,494	)		(6,101,027	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,903		129,566		5,331			—			150,800
GOODWILL		—		81,736		2,478,780		35,231			—			2,595,747
TRADEMARKS AND TRADE NAMES		—		19,376		313,280		12,286			—			344,942
OTHER INTANGIBLE ASSETS—Net		—		8,760		459,615		15,049			—			483,424
DEBT ISSUE COSTS—Net		—		59,007		—		—			—			59,007
OTHER		—		2,415		7,010		(1	)		—			9,424
TOTAL ASSETS	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—	$	15,500	$	—	$	—		$	—		$	15,500
Accounts payable		—		8,071		49,944		4,889			(794	)		62,110
Accrued liabilities		—		52,525		65,178		2,609			—			120,312
Income taxes payable		—		5,561		3,155		221			—			8,937
Total current liabilities		—		81,657		118,277		7,719			(794	)		206,859
LONG-TERM DEBT		—		3,122,875		—		—			—			3,122,875
DEFERRED INCOME TAXES		—		199,610		110,841		—			—			310,451
OTHER NON-CURRENT LIABILITIES		—		26,717		35,785		—			—			62,502
Total liabilities		—		3,430,859		264,903		7,719			(794	)		3,702,687
STOCKHOLDERS’ EQUITY		810,949		923,256		5,100,392		77,363			(6,101,011	)		810,949
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636

F-29

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	4,884	$	226,200	$	3,028	$	—		$	234,112
Trade accounts receivable—Net		—		12,935		122,174		(648	)		134,461
Inventories		—		19,694		169,296		(234	)		188,756
Deferred income taxes		—		15,200		—		—			15,200
Prepaid expenses and other		—		7,837		3,142		—			10,979
Total current assets		4,884		281,866		297,640		(882	)		583,508
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		588,095		2,293,001		907,547		(3,788,643	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,248		84,365		—			99,613
GOODWILL		—		68,593		1,503,071		—			1,571,664
TRADEMARKS AND TRADE NAMES		—		19,376		168,180		—			187,556
OTHER INTANGIBLE ASSETS—Net		—		9,387		203,451		—			212,838
DEBT ISSUE COSTS—Net		—		18,649		—		—			18,649
OTHER		—		2,350		1,640		—			3,990
TOTAL ASSETS	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	—	$	9,767	$	35,107	$	(648	)	$	44,226
Accrued liabilities		—		32,639		36,147		—			68,786
Total current liabilities		—		42,406		71,254		(648	)		113,012
LONG-TERM DEBT—Less current portion		—		1,771,646		—		—			1,771,646
DEFERRED INCOME TAXES		—		168,588		—		—			168,588
OTHER NON-CURRENT LIABILITIES		—		19,733		11,860		—			31,593
Total liabilities		—		2,002,373		83,114		(648	)		2,084,839
STOCKHOLDERS’ EQUITY		592,979		706,097		3,082,780		(3,788,877	)		592,979
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818

F-30

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2011

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	81,944		$	1,097,662	$	31,649		$	(5,234	)	$	1,206,021
COST OF SALES		—			46,438			479,536		24,334			(5,472	)		544,836
GROSS PROFIT		—			35,506			618,126		7,315			238			661,185
SELLING AND ADMINISTRATIVE EXPENSES		—			44,754			85,796		3,172			(11	)		133,711
AMORTIZATION OF INTANGIBLE ASSETS		—			624			37,900		1,815			—			40,339
INCOME (LOSS) FROM OPERATIONS		—			(9,872	)		494,430		2,328			249			487,135
REFINANCING COSTS		—			72,454			—		—			—			72,454
INTEREST EXPENSE—Net		—			183,175			777		1,304			—			185,256
EQUITY IN INCOME OF SUBSIDIARIES		(172,134	)		(345,158	)		—		—			517,292			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		172,134			79,657			493,653		1,024			(517,043	)		229,425
INCOME TAX PROVISION (BENEFIT)		—			(92,477	)		167,822		1,855			—			77,200
INCOME (LOSS) FROM CONTINUING OPERATIONS		172,134			172,134			325,831		(831	)		(517,043	)		152,225
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX		—			—			4,883		15,026			—			19,909
NET INCOME	$	172,134		$	172,134		$	330,714	$	14,195		$	(517,043	)	$	172,134

F-31

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	64,990		$	766,068	$	(3,404	)	$	827,654
COST OF SALES		—			36,398			320,288		(2,098	)		354,588
GROSS PROFIT		—			28,592			445,780		(1,306	)		473,066
SELLING AND ADMINISTRATIVE EXPENSES		—			31,130			65,088		(1,300	)		94,918
AMORTIZATION OF INTANGIBLE ASSETS		—			624			14,455		—			15,079
INCOME (LOSS) FROM OPERATIONS		—			(3,162	)		366,237		(6	)		363,069
INTEREST EXPENSE—NET		—			110,127			2,107		—			112,234
EQUITY IN INCOME OF SUBSIDIARIES		(163,445	)		(237,334	)		—		400,779			—
INCOME BEFORE INCOME TAXES		163,445			124,045			364,130		(400,785	)		250,835
INCOME TAX PROVISION (BENEFIT)		—			(39,400	)		126,790		—			87,390
NET INCOME	$	163,445		$	163,445		$	237,340	$	(400,785	)	$	163,445

F-32

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2009

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	68,660		$	694,730	$	(1,838	)	$	761,552
COST OF SALES		—			38,647			295,077		(1,518	)		332,206
GROSS PROFIT		—			30,013			399,653		(320	)		429,346
SELLING AND ADMINISTRATIVE EXPENSES		—			27,010			53,308		(300	)		80,018
AMORTIZATION OF INTANGIBLE ASSETS		—			624			13,304		—			13,928
INCOME FROM OPERATIONS		—			2,379			333,041		(20	)		335,400
INTEREST EXPENSE—NET		—			79,880			4,518		—			84,398
EQUITY IN INCOME OF SUBSIDIARIES		(162,902	)		(213,190	)		—		376,092			—
INCOME BEFORE INCOME TAXES		162,902			135,689			328,523		(376,112	)		251,002
INCOME TAX PROVISION (BENEFIT)		—			(27,213	)		115,313		—			88,100
NET INCOME	$	162,902		$	162,902		$	213,210	$	(376,112	)	$	162,902

F-33

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2011

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$	—		$	(164,846	)	$	409,483		$	14,294		$	1,647		$	260,578
INVESTING ACTIVITIES:
Capital expenditures		—			(2,639	)		(15,140	)		(247	)		—			(18,026	)
Acquisition of businesses, net of cash acquired		—			(1,650,363	)		—			—			—			(1,650,363	)
Cash proceeds from sales of discontinued operations		—			271,361			—			—			—			271,361
Net cash used in investing activities		—			(1,381,641	)		(15,140	)		(247	)		—			(1,397,028	)
FINANCING ACTIVITIES:
Intercompany activities		(28,997	)		431,648			(395,256	)		(5,748	)		(1,647	)		—
Excess tax benefits related to share-based payment arrangements		23,411			—			—			—			—			23,411
Proceeds from exercise of stock options		9,208			—			—			—			—			9,208
Dividends paid		(2,811	)		—			—			—			—			(2,811	)
Proceeds from new senior secured credit facility—net		—			1,500,048			—			—			—			1,500,048
Repayment on new senior secured credit facility		—			(11,625	)		—			—			—			(11,625	)
Proceeds from 2018 senior subordinated notes—net		—			1,582,184			—			—			—			1,582,184
Repurchase of 2014 senior subordinated notes		—			(1,041,894	)		—			—			—			(1,041,894	)
Repayment of previous senior secured credit facility		—			(780,000	)		—			—			—			(780,000	)
Net cash provided by (used in) financing activities		811			1,680,361			(395,256	)		(5,748	)		(1,647	)		1,278,521
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		811			133,874			(913	)		8,299			—			142,071
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		4,884			226,200			3,028			—			—			234,112
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	5,695		$	360,074		$	2,115		$	8,299		$	—		$	376,183

F-34

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations			Total Consolidated
OPERATING ACTIVITIES	$	—		$	(53,873	)	$	251,175		$	2		$	197,304
INVESTING ACTIVITIES:
Capital expenditures		—			(1,875	)		(11,012	)		—			(12,887	)
Acquisition of businesses, net of cash acquired		—			(166,557	)		—			—			(166,557	)
Proceeds from sale of real estate		—			—			2,885						2,885
Net cash used in investing activities		—			(168,432	)		(8,127	)		—			(176,559	)
FINANCING ACTIVITIES:
Intercompany activities		370,544			(129,373	)		(241,169	)		(2	)		—
Excess tax benefits related to share-based payment arrangements		17,459			—			—			—			17,459
Proceeds from exercise of stock options		6,361			—			—			—			6,361
Dividends paid		(404,868	)		—			—			—			(404,868	)
Proceeds from senior subordinated notes-net		—			404,248			—			—			404,248
Net cash provided by (used in) financing activities		(10,504	)		274,875			(241,169	)		(2	)		23,200
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(10,504	)		52,570			1,879			—			43,945
CASH AND CASH EQUIVALENTS—
Beginning of year		15,388			173,630			1,149			—			190,167
CASH AND CASH EQUIVALENTS—
End of year	$	4,884		$	226,200		$	3,028		$	—		$	234,112

F-35

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2009

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations		Total Consolidated
OPERATING ACTIVITIES	$	—		$	(29,358	)	$	226,470		$	—	$	197,112
INVESTING ACTIVITIES:
Capital expenditures		—			(2,370	)		(10,785	)		—		(13,155	)
Acquisition of businesses, net of cash acquired		—			(155,233	)		—			—		(155,233	)
Net cash used in investing activities		—			(157,603	)		(10,785	)		—		(168,388	)
FINANCING ACTIVITIES:
Intercompany activities		11,455			199,911			(211,366	)		—		—
Excess tax benefits related to share-based payment arrangements		9,278			—			—			—		9,278
Proceeds from exercise of stock options		8,345			—			—			—		8,345
Purchase of treasury stock		(15,242	)		—			—			—		(15,242	)
Net cash provided by (used in) financing activities		13,836			199,911			(211,366	)		—		2,381
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		13,836			12,950			4,319			—		31,105
CASH AND CASH EQUIVALENTS—
Beginning of year		1,552			160,680			(3,170	)		—		159,062
CASH AND CASH EQUIVALENTS—
End of year	$	15,388		$	173,630		$	1,149		$	—	$	190,167

*****

F-36

TRANSDIGM GROUP INCORPORATED

VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED SEPTEMBER 30, 2011, 2010, AND 2009

(Amounts in Thousands)

Column A	Column B		Column C					Column D			Column E
Description	Balance at Beginning of Period		Additions					Deductions from Reserve(1)			Balance at End of Period
			Charged to Costs and Expenses			Acquisitions
Year Ended September 30, 2011
Allowance for doubtful accounts	$	2,270	$	570		$	599	$	(566	)	$	2,873
Reserve for excess and obsolete inventory		18,251		8,361			415		(1,404	)		25,623
Year Ended September 30, 2010
Allowance for doubtful accounts		2,448		(156	)		678		(700	)		2,270
Reserve for excess and obsolete inventory		17,018		22			1,882		(671	)		18,251
Year Ended September 30, 2009
Allowance for doubtful accounts		2,182		636			295		(665	)		2,448
Reserve for excess and obsolete inventory		15,862		2,537			634		(2,015	)		17,018

(1) The amounts in this column represent charge-offs net of recoveries.

F-37

EXHIBIT INDEX

TO FORM 10-K FOR THE YEAR ENDED SEPTEMBER 30, 2011

EXHIBIT NO.	DESCRIPTION
4.3	Form of Supplemental Indenture to Indenture dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee
4.5	Form of Supplemental Indenture to Indenture dated October 6, 2009, among TransDigm Inc., TransDigm Group Incorporated, the Guarantors named therein and The Bank of New York Trust Company, N.A., as trustee
10.43	Form of Joinder Agreement between the applicable subsidiaries and Credit Suisse, as administrative and collateral agent
10.47	Form of Joinder Agreement, dated as of September 22, 2011, between Schneller Holdings LLC, Schneller LLC, Schneller International Sales Corp. and Credit Suisse, as agent
10.50	Form of Joinder Agreement, dated as of September 22, 2011, between Schneller Holdings LLC, Schneller LLC, Schneller International Sales Corp. and Credit Suisse, as agent
12.1	Statement of Computation of Ratio of Earnings to Fixed Charges
21.1	Subsidiaries of TransDigm Group Incorporated
23.1	Consent of Independent Registered Public Accounting Firm
31.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	Financial Statements and Notes to Consolidated Financial Statements formatted in XBRL.

EX-4.3

Exhibit 4.3

TRANSDIGM INC.,

TRANSDIGM GROUP INCORPORATED,

THE GUARANTORS NAMED HEREIN,

and

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,

as Trustee

[*] SUPPLEMENTAL INDENTURE

Dated as of [                            *]

to

Indenture

Dated as of June 23, 2006

by and among

TRANSDIGM INC.,

TRANSDIGM GROUP INCORPORATED,

THE GUARANTORS NAMED THEREIN,

and

THE BANK OF NEW YORK TRUST COMPANY, N.A.,

as Trustee

7 ³/4% Senior Subordinated Notes due 2014

of TransDigm Inc.

This [*] SUPPLEMENTAL INDENTURE (this “SUPPLEMENTAL INDENTURE”), dated as of [                            *], among [                            *] (the “GUARANTEEING SUBSIDIARIES”), TransDigm Inc., a Delaware corporation (the “COMPANY”), TransDigm Group Incorporated, a Delaware corporation (“TD GROUP”), [the other subsidiaries already party to the Indenture] ([such subsidiaries], together with TD Group, the “EXISTING GUARANTORS”), and The Bank of New York Mellon Trust Company, N.A., as trustee (the “TRUSTEE”) under the indenture referred to below (the “INDENTURE”). Capitalized terms used herein and not otherwise defined shall have the meaning assigned to them in the Indenture.

WITNESSETH:

WHEREAS, the Company and the Existing Guarantors have heretofore executed and delivered to the Trustee an indenture (as supplemented by the [prior supplemental indentures], the “INDENTURE”), dated as of June 23,

2006, providing for the issuance by the Company of 7-3/4% Senior Subordinated Notes due 2014 (the “NOTES”) and the guarantees thereof by each of the Existing Guarantors;

WHEREAS, the Indenture provides that under certain circumstances described therein, newly created or acquired Domestic Restricted Subsidiaries shall execute and deliver to the Trustee a supplemental indenture to the Indenture providing for a senior subordinated guarantee of payment of the Notes by such Domestic Restricted Subsidiary (the “SUBSIDIARY GUARANTEE”);

WHEREAS, all things necessary to make this Supplemental Indenture the legal, valid and binding obligation of the Company, the Existing Guarantors and the Guaranteeing Subsidiaries have been done; and

WHEREAS, pursuant to Section 9.01(g) of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture without the consent of the Holders of the Notes.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. GUARANTEE, ETC. The Guaranteeing Subsidiaries hereby agree that from and after the date hereof each shall be a Guarantor under the Indenture and be bound by the terms thereof applicable to Guarantors and shall be entitled to all of the rights and subject to all the obligations of a Guarantor thereunder.

3. RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURES PART OF INDENTURE. The Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

4. EXECUTION AND DELIVERY. The Guaranteeing Subsidiaries agree that the Guarantee granted by each of them pursuant to the terms hereof shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Guarantee.

5. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of any of the Guaranteeing Subsidiaries (or any successor entity) (other than the Company or the Existing Guarantors), as such, shall have any liability for any obligations of the Company, TD Group, the Guaranteeing Subsidiaries or any other Guarantor under the Notes, any Guarantee, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes.

6. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE AND THE GUARANTEE GRANTED HEREUNDER WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

7. COUNTERPART ORIGINALS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

8. EFFECT OF HEADINGS. The Section headings have been inserted for convenience of reference only, are not to be considered part of this Supplemental Indenture and shall in no way modify or restrict any of the terms or provisions hereof.

9. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained

herein, all of which recitals are made solely by the Guaranteeing Subsidiaries, the Existing Guarantors and the Company.

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date hereof.

TRANSDIGM INC.
By:	/s/ Gregory Rufus
Name:	Gregory Rufus
Title:	Executive Vice President and Chief Financial Officer
TRANSDIGM GROUP INCORPORATED
By:	/s/ Gregory Rufus
Name:	Gregory Rufus
Title:	Executive Vice President Chief Financial Officer and Secretary
[ALL THEN EXISTING SUBSIDIARY GUARANTORS]
By:	/s/
Name:
Title:
THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE
By:	/s/ Ted Mosterd
Name:	Ted Mosterd
Title:	Associate

* Hartwell Corporation, McKechnie Aerospace DE, Inc., McKechnie Aerospace Holdings, Inc., McKechnie Aerospace Investments, Inc., McKechnie Aerospace US LLC, Texas Rotronics, Inc., Valley-Todeco, Inc. and Western Sky Industries, LLC are Guaranteeing Subsidiaries under a Tenth Supplemental Indenture dated December 6, 2010 substantially in the form hereof. Semco Instruments, Inc. is a Guaranteeing Subsidiary under a Ninth Supplemental Indenture dated September 3, 2010 substantially in the form hereof. Dukes Aerospace, Inc. is a Guaranteeing Subsidiary under an Eighth Supplemental Indenture dated December 2, 2009 substantially in the form hereof. Acme Aerospace, Inc. is a Guaranteeing Subsidiary under a Seventh Supplemental Indenture dated July 27, 2009 substantially in the form hereof. Aircraft Parts Corporation is a Guaranteeing Subsidiary under a Sixth Supplemental Indenture dated December 16, 2008 substantially in the form hereof. CEF Industries, Inc. is a Guaranteeing Subsidiary under a Fifth Supplemental Indenture dated May 7, 2008 substantially in the form hereof. Bruce Aerospace Inc. and Bruce Industries, Inc. are Guaranteeing Subsidiaries under a Fourth Supplemental Indenture dated August 10, 2007 in substantially the form hereof. AeroControlex Group, Inc. is a Guaranteeing Subsidiary under a Third Supplemental Indenture dated June 29, 2007 in substantially the form hereof. Aviation Technologies, Inc., Avtech Corporation, Transicoil Corp., West Coast Specialties, Inc. and Malaysian Aerospace Services, Inc. are Guaranteeing Subsidiaries under a Second Supplemental Indenture dated February 7, 2007 substantially in the form hereof. CDA Intercorp is a Guaranteeing Subsidiary under a First Supplemental Indenture dated November 2, 2006 substantially in the form hereof.

EX-4.5

Exhibit 4.5

TRANSDIGM INC.,

TRANSDIGM GROUP INCORPORATED,

THE GUARANTORS NAMED HEREIN,

and

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,

as Trustee

FORM OF SUPPLEMENTAL INDENTURE

Dated as of [                    *]

to

Indenture

Dated as of October 6, 2009

by and among

TRANSDIGM INC.,

TRANSDIGM GROUP INCORPORATED,

THE GUARANTORS NAMED THEREIN,

and

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,

as Trustee

7 ³/4% Senior Subordinated Notes due 2014

of TransDigm Inc.

This [*] SUPPLEMENTAL INDENTURE (this “SUPPLEMENTAL INDENTURE”), dated as of [                            *], among [                            *] (the “GUARANTEEING SUBSIDIARIES”), TransDigm Inc., a Delaware corporation (the “COMPANY”), TransDigm Group Incorporated, a Delaware corporation (“TD GROUP”), [the other subsidiaries already party to the Indenture] ([such subsidiaries], together with TD Group, the “EXISTING GUARANTORS”), and The Bank of New York Mellon Trust Company, N.A., as trustee (the “TRUSTEE”) under the indenture referred to below (the “INDENTURE”). Capitalized terms used herein and not otherwise defined shall have the meaning assigned to them in the Indenture.

WITNESSETH:

WHEREAS, the Company and the Existing Guarantors have heretofore executed and delivered to the Trustee an indenture (as supplemented by the [prior supplemental indentures], the “INDENTURE”), dated as of

October 6, 2009, providing for the issuance by the Company of 7-3/4% Senior Subordinated Notes due 2014 (the “NOTES”) and the guarantees thereof by each of the Existing Guarantors;

WHEREAS, the Indenture provides that under certain circumstances described therein, newly created or acquired Domestic Restricted Subsidiaries shall execute and deliver to the Trustee a supplemental indenture to the Indenture providing for a senior subordinated guarantee of payment of the Notes by such Domestic Restricted Subsidiary (the “SUBSIDIARY GUARANTEE”);

WHEREAS, all things necessary to make this Supplemental Indenture the legal, valid and binding obligation of the Company, the Existing Guarantors and the Guaranteeing Subsidiaries have been done; and

WHEREAS, pursuant to Section 9.01(g) of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture without the consent of the Holders of the Notes.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. GUARANTEE, ETC. The Guaranteeing Subsidiaries hereby agree that from and after the date hereof each shall be a Guarantor under the Indenture and be bound by the terms thereof applicable to Guarantors and shall be entitled to all of the rights and subject to all the obligations of a Guarantor thereunder.

3. RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURES PART OF INDENTURE. The Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

4. EXECUTION AND DELIVERY. The Guaranteeing Subsidiaries agree that the Guarantee granted by each of them pursuant to the terms hereof shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Guarantee.

5. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of any of the Guaranteeing Subsidiaries (or any successor entity) (other than the Company or the Existing Guarantors), as such, shall have any liability for any obligations of the Company, TD Group, the Guaranteeing Subsidiaries or any other Guarantor under the Notes, any Guarantee, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes.

6. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE AND THE GUARANTEE GRANTED HEREUNDER WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

7. COUNTERPART ORIGINALS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

8. EFFECT OF HEADINGS. The Section headings have been inserted for convenience of reference only, are not to be considered part of this Supplemental Indenture and shall in no way modify or restrict any of the terms or provisions hereof.

9. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries, the Existing Guarantors and the Company.

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date hereof.

TRANSDIGM INC.
By:	/s/ Gregory Rufus
Name:	Gregory Rufus
Title:	Executive Vice President and Chief Financial Officer
TRANSDIGM GROUP INCORPORATED
By:	/s/ Gregory Rufus
Name:	Gregory Rufus
Title:	Executive Vice President Chief Financial Officer and Secretary
[ALL THEN EXISTING SUBSIDIARY GUARANTORS]
By:	/s/
Name:
Title:
THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE
By:	/s/ Ted Mosterd
Name:	Ted Mosterd
Title:	Associate

* Hartwell Corporation, McKechnie Aerospace DE, Inc., McKechnie Aerospace Holdings, Inc., McKechnie Aerospace Investments, Inc., McKechnie Aerospace US LLC, Texas Rotronics, Inc., Valley-Todeco, Inc., and Western Sky Industries, LLC are Guaranteeing Subsidiaries under the Third Supplemental Indenture dated December 6, 2010 substantially in the form hereof. Semco Instruments, Inc. is a Guaranteeing Subsidiary under the Second Supplemental Indenture dated September 3, 2010 substantially in the form hereof. Dukes Aerospace, Inc. is a Guaranteeing Subsidiary under the First Supplemental Indenture dated December 2, 2009 substantially in the form hereof.

EX-10.43

Exhibit 10.43

FORM OF JOINDER AGREEMENT

THIS JOINDER AGREEMENT (this “Agreement”), dated as of [                                         *], is entered into among [                                        *] (each, a “New Subsidiary” and collectively, the “New Subsidiaries”), and CREDIT SUISSE AG (formerly known as Credit Suisse), as Agent, under that certain Credit Agreement, dated as of June 23, 2006 (as the same may be amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among TransDigm Inc., a Delaware corporation (the “Borrower”), TransDigm Group Incorporated, a Delaware corporation, the Subsidiaries of the Borrower from time to time party thereto, the Lenders from time to time party thereto and the Agent, as amended by (i) that certain Amendment No. 1, Consent and Agreement dated as of January 25, 2007 and (ii) that certain Assumption Agreement dated as of February 7, 2007. All capitalized terms used herein and not otherwise defined shall have the meanings set forth in the Credit Agreement.

Each New Subsidiary and the Agent, for the benefit of the Lenders, hereby agree as follows:

1. Each New Subsidiary hereby acknowledges, agrees and confirms that, by its execution of this Agreement, each New Subsidiary will be deemed to be a Loan Party under the Credit Agreement and a Loan Guarantor for all purposes of the Credit Agreement and shall have all of the obligations of a Loan Party and a Loan Guarantor thereunder as if it had executed the Credit Agreement. Each New Subsidiary hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions contained in the Credit Agreement, including without limitation (a) all of the representations and warranties of the Loan Parties set forth in Article III of the Credit Agreement (to the extent made or deemed made on or after the effective date hereof), (b) all of the covenants set forth in Articles V and VI of the Credit Agreement and(c) all of the guaranty obligations set forth in the Guarantee and Collateral Agreement. Without limiting the generality of the foregoing terms of this paragraph 1, each New Subsidiary, subject to the limitations set forth in the Guarantee and Collateral Agreement, hereby absolutely and unconditionally guarantees, jointly and severally with the other Loan Guarantors, to the Agent and the Lenders, the prompt payment of the Secured Obligations in full when due (whether at stated maturity, upon acceleration or otherwise) to the extent of and in accordance with the Guarantee and Collateral Agreement.

2. If required, each New Subsidiary is, simultaneously with the execution of this Agreement, executing and delivering such Collateral Documents (and such other documents and instruments) as requested by the Agent in accordance with the Credit Agreement.

3. Each New Subsidiary hereby waives acceptance by the Agent and the Lenders of the guaranty by each New Subsidiary upon the execution of this Agreement by each New Subsidiary.

4. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument.

5. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

[Remainder of page intentionally left blank]

IN WITNESS WHEREOF, each New Subsidiary has caused this Agreement to be duly executed by its respective authorized officer, and the Agent, for the benefit of the Lenders, has caused the same to be accepted by its authorized officer, as of the day and year first above written.

[Applicable subsidiary signatures]*
Acknowledged and accepted:
CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH (formerly known as Credit Suisse, Cayman Islands branch), as Agent
by	/s/
	Name:
	Title:
by	/s/
	Name:
	Title:

* MCKECHNIE AEROSPACE HOLDINGS, INC., MCKECHNIE AEROSPACE DE, INC., MCKECHNIE AEROSPACE US LLC, MCKECHNIE AEROSPACE INVESTMENTS, INC., VALLEY-TODECO, INC., HARTWELL CORPORATION, WESTERN SKY INDUSTRIES, LLC and TEXAS ROTRONICS, INC. became parties to a Joinder Agreement in the form hereof on December 6, 2010. SEMCO INSTRUMENTS, INC. became party to a Joinder Agreement substantially in the form hereof on September 3, 2010. DUKES AEROSPACE, INC. became a party to a Joinder Agreement substantially in the form hereof on December 2, 2009. ACME AEROSPACE, INC. became a party to a Joinder Agreement substantially in the form hereof on July 27, 2009. AIRCRAFT PARTS CORPORATION became a party to a Joinder Agreement substantially in the form hereof on December 16, 2008. CEF INDUSTRIES, INC. became a party to a Joinder Agreement substantially in the form hereof on May 7, 2008. BRUCE AEROSPACE INC. and BRUCE INDUSTRIES, INC. became parties to a Joinder Agreement substantially in the form hereof on September 10, 2007. AEROCONTROLEX GROUP, INC. became a party to a Joinder Agreement substantially in the form hereof on June 29, 1007. AVIATION TECHNOLOGIES, INC., AVTECH CORPORATION, TRANSICOIL CORP., WEST COAST SPECIALTIES, INC. and MALAYSIAN AEROSPACE SERVICES, INC. became parties to a Joinder Agreement substantially in the form hereof on February 7, 2007. CDA INTERCORP became a party to a Joinder Agreement substantially in the form hereof on November 2, 2006.

EX-10.47

Exhibit 10.47

FORM OF JOINDER AGREEMENT

THIS JOINDER AGREEMENT (this “Agreement”), dated as of September 22, 2011, is entered into between [Schneller Holdings LLC, a Delaware limited liability company] [Schneller LLC, a Delaware limited liability company] [Schneller International Sales Corp., an Ohio corporation] (the “New Subsidiary”) and CREDIT SUISSE AG, as administrative agent and collateral agent (in such capacities, the “Agent”), under that certain Credit Agreement, dated as of December 6, 2010, as amended by Amendment No. 1 as of March 25, 2011 (as the same may be further amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among TransDigm Inc., a Delaware corporation (the “Borrower”), TransDigm Group Incorporated, a Delaware corporation, the Subsidiaries of the Borrower from time to time party thereto, the Lenders from time to time party thereto and the Agent. All capitalized terms used herein and not otherwise defined shall have the meanings set forth in the Credit Agreement.

The New Subsidiary and the Agent, for the benefit of the Lenders, hereby agree as follows:

1. The New Subsidiary hereby acknowledges, agrees and confirms that, by its execution of this Agreement, the New Subsidiary will be deemed to be a Loan Party under the Credit Agreement and a Loan Guarantor for all purposes of the Credit Agreement and shall have all of the obligations of a Loan Party and a Subsidiary Guarantor thereunder as if it had executed the Credit Agreement. The New Subsidiary hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions contained in the Credit Agreement, including without limitation (a) all of the representations and warranties of the Loan Parties set forth in Article III of the Credit Agreement (to the extent made or deemed made on or after the effective date hereof), (b) all of the covenants set forth in Articles V and VI of the Credit Agreement and (c) all of the guaranty obligations set forth in the Guarantee and Collateral Agreement. Without limiting the generality of the foregoing terms of this paragraph 1, the New Subsidiary, subject to the limitations set forth in the Guarantee and Collateral Agreement, hereby absolutely and unconditionally guarantees, jointly and severally with the other Guarantors, to the Agent and the Lenders, the prompt payment of the Additional Obligations in full when due (whether at stated maturity, upon acceleration or otherwise) to the extent of and in accordance with Guarantee and Collateral Agreement.

2. If required, the New Subsidiary is, simultaneously with the execution of this Agreement, executing and delivering such Collateral Documents (and such other documents and instruments) as reasonably requested by the Agent in accordance with the Credit Agreement.

3. The New Subsidiary hereby waives acceptance by the Agent and the Lenders of the guaranty by the New Subsidiary upon the execution of this Agreement by the New Subsidiary.

4. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument.

5. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

IN WITNESS WHEREOF, the New Subsidiary has caused this Agreement to be duly executed by its authorized officer, and the Agent, for the benefit of the Lenders, has caused the same to be accepted by its authorized officer, as of the day and year first above written.

[SCHNELLER HOLDINGS LLC] [SCHNELLER LLC] [SCHNELLER INTERNATIONAL SALES CORP.]
by	/s/ Gregory Rufus
	Name: Gregory Rufus
	Title: Treasurer and Secretary
	Acknowledged and accepted:
	CREDIT SUISSE AG, as Agent
by	/s/ Robert Hetu
	Name: Robert Hetu
	Title: Managing Director
by	/s/ Kevin Buddhdew
	Name: Kevin Buddhdew
	Title: Associate

EX-10.50

Exhibit 10.50

FORM OF JOINDER AGREEMENT

THIS JOINDER AGREEMENT (this “Agreement”), dated as of September 22, 2011, is entered into between [Schneller Holdings LLC, a Delaware limited liability company] [Schneller LLC, a Delaware limited liability company] [Schneller International Sales Corp., an Ohio corporation] (the “New Subsidiary”), and CREDIT SUISSE AG, as administrative agent and collateral agent (in such capacities, the “Agent”), under that certain Credit Agreement, dated as of February 14, 2011 (as the same may be amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among TransDigm Inc., a Delaware corporation (the “Borrower”), TransDigm Group Incorporated, a Delaware corporation, the Subsidiaries of the Borrower from time to time party thereto, the Lenders from time to time party thereto and the Agent. All capitalized terms used herein and not otherwise defined shall have the meanings set forth in the Credit Agreement.

The New Subsidiary and the Agent, for the benefit of the Lenders, hereby agree as follows:

1. The New Subsidiary hereby acknowledges, agrees and confirms that, by its execution of this Agreement, the New Subsidiary will be deemed to be a Loan Party under the Credit Agreement and a Loan Guarantor for all purposes of the Credit Agreement and shall have all of the obligations of a Loan Party and a Subsidiary Guarantor thereunder as if it had executed the Credit Agreement. The New Subsidiary hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions contained in the Credit Agreement, including without limitation (a) all of the representations and warranties of the Loan Parties set forth in Article III of the Credit Agreement (to the extent made or deemed made on or after the effective date hereof), (b) all of the covenants set forth in Articles V and VI of the Credit Agreement and (c) all of the guaranty obligations set forth in the Guarantee and Collateral Agreement. Without limiting the generality of the foregoing terms of this paragraph 1, the New Subsidiary, subject to the limitations set forth in the Guarantee and Collateral Agreement, hereby absolutely and unconditionally guarantees, jointly and severally with the other Guarantors, to the Agent and the Lenders, the prompt payment of the Additional Obligations in full when due (whether at stated maturity, upon acceleration or otherwise) to the extent of and in accordance with Guarantee and Collateral Agreement.

2. If required, the New Subsidiary is, simultaneously with the execution of this Agreement, executing and delivering such Collateral Documents (and such other documents and instruments) as reasonably requested by the Agent in accordance with the Credit Agreement.

3. The New Subsidiary hereby waives acceptance by the Agent and the Lenders of the guaranty by the New Subsidiary upon the execution of this Agreement by the New Subsidiary.

4. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument.

5. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

IN WITNESS WHEREOF, the New Subsidiary has caused this Agreement to be duly executed by its authorized officer, and the Agent, for the benefit of the Lenders, has caused the same to be accepted by its authorized officer, as of the day and year first above written.

[SCHNELLER HOLDINGS LLC] [SCHNELLER LLC] [SCHNELLER INTERNATIONAL SALES CORP.]
by	/s/ Gregory Rufus
	Name: Gregory Rufus
	Title: Treasurer and Secretary
Acknowledged and accepted:
CREDIT SUISSE AG, as Agent
by	/s/ Robert Hetu
	Name: Robert Hetu
	Title: Managing Director
by	/s/ Kevin Buddhdew
	Name: Kevin Buddhdew
	Title: Associate

EX-12.1

Exhibit 12.1

TRANSDIGM GROUP INCORPORATED

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Amounts in Thousands)

	Fiscal Year Ended September 30,
	2011		2010		2009		2008		2007
Earnings:
Total earnings from continuing operations	$	152,225	$	163,445	$	162,902	$	133,126	$	88,645
Income tax provision		77,200		87,390		88,100		73,476		53,426
Pre Tax Earnings		229,425		250,835		251,002		206,602		142,071
Fixed charges:
Interest charges		185,256		112,234		84,398		92,677		91,767
Interest factor of operating rents		1,959		1,398		1,095		1,052		931
Total fixed charges		187,215		113,632		85,493		93,729		92,698
Earnings as adjusted	$	416,640	$	364,467	$	336,495	$	300,331	$	234,769
Ratio of earnings to fixed charges (1)		2.2		3.2		3.9		3.2		2.5

(1) For purposes of computing the ratio of earnings to fixed charges, earnings consist of earnings before income taxes plus fixed charges. Fixed charges consist of interest expense, amortization of debt issuance costs and the portion (approximately 33%) of rental expense that management believes is representative of the interest component of rental expense.

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF TRANSDIGM GROUP INCORPORATED

TransDigm Inc. is a wholly owned subsidiary of TransDigm Group Incorporated.

TransDigm Inc. owns, directly or indirectly, the following subsidiaries:

Name of Subsidiary	State of Jurisdiction of Incorporation or Organization
Acme Aerospace, Inc.	Delaware
Adams Rite Aerospace, Inc.	California
AeroControlex Group, Inc.	Delaware
Aircraft Parts Corporation	New York
Aviation Technologies, Inc.	Delaware
Avionic Instruments LLC	Delaware
Avtech Corporation	Washington
Bruce Aerospace, Inc.	Delaware
Bruce Industries, Inc.	Colorado
CDA InterCorp LLC	Florida
CEF Industries, LLC	Delaware
Champion Aerospace LLC	Delaware
Dukes Aerospace, Inc.	Delaware
Hartwell Corporation	California
Malaysian Aerospace Services, Inc.	Delaware
Marathon Power Technologies Limited	England
MarathonNorco Aerospace, Inc.	Delaware
McKechnie Aerospace DE, Inc.	Delaware
McKechnie Aerospace (Europe) Ltd.	England
McKechnie Aerospace Holdings, Inc.	Delaware
McKechnie Aerospace Investments, Inc.	Delaware
McKechnie Aerospace US LLC	Delaware
Mecanismos De Matamores S.A. de C.V.	Mexico
Schneller Asia Pte. Ltd.	Singapore
Schneller Holdings LLC	Delaware
Schneller International Sales Corp.	Ohio
Schneller LLC	Delaware
Schneller S.A.R.L.	France
Semco Instruments, Inc.	Delaware
Skurka Aerospace Inc.	Delaware
Technical Airborne Components Limited	England
Technical Airborne Components Industries SPRL	Belgium
Texas Rotronics, Inc.	Texas
Transicoil (Malaysia) Sendirian Berhad	Malaysia
Traniscoil LLC	Delaware
Western Sky Industries LLC	Delaware

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statements (Form S-8 No. 333-174122; Form S-8 No. 333-152847) pertaining to the TransDigm Group Incorporated 2006 Stock Incentive Plan,

(2) Registration Statement (Form S-8 No. 333-132808) pertaining to the TransDigm Group Incorporated 2006 Stock Incentive Plan and the TransDigm Group Incorporated Fourth Amended and Restated 2003 Stock Option Plan, as amended, and

(3) Registration Statement (Form S-8 No. 333-148860) pertaining to the Stock Option Agreements between TransDigm Group Incorporated and Michael Graff and Douglas Peacock;

of our reports dated November 18, 2011, with respect to the consolidated financial statements and schedule of TransDigm Group Incorporated and the effectiveness of internal control over financial reporting of TransDigm Group Incorporated included in this Annual Report (Form 10-K) of TransDigm Group Incorporated for the year ended September 30, 2011.

/s/ Ernst & Young LLP

Cleveland, Ohio

November 18, 2011

EX-31.1

Exhibit 31.1

CERTIFICATION

I, W. Nicholas Howley, certify that:

1. I have reviewed this annual report on Form 10-K of TransDigm Group Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors:

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 18, 2011

/s/ W. Nicholas Howley

Name: W. Nicholas Howley

Title: Chairman of the Board of Directors and Chief

Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Gregory Rufus, certify that:

1. I have reviewed this annual report on Form 10-K of TransDigm Group Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors:

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 18, 2011

/s/ Gregory Rufus

Name: Gregory Rufus

Title: Executive Vice President, Chief Financial Officer and Secretary (Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of TransDigm Group Incorporated (the “Company”) for the fiscal year ended September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, W. Nicholas Howley, Chief Executive Officer and Director (Principal Executive Officer), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

2. The information contained in the Report fairly presents in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

Date: November 18, 2011

/s/ W. Nicholas Howley

Name: W. Nicholas Howley

Title: Chairman of the Board of Directors and Chief

Executive Officer (Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of TransDigm Group Incorporated (the “Company”) for the fiscal year ended September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gregory Rufus, Executive Vice President, Chief Financial Officer and Secretary (Principal Financial and Accounting Officer) certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

2. The information contained in the Report fairly presents in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

Date: November 18, 2011

/s/ Gregory Rufus

Name: Gregory Rufus

Title: Executive Vice President, Chief

Financial Officer and Secretary (Principal Financial and Accounting Officer)

XML

Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011 years
2006 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding, end of period	1,420
2006 Stock Incentive Plan [Member] | Performance Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding, beginning of period	2,979,825
Number of Options, Granted	1,786,250
Number of Options, Exercised	(32,848)
Number of Options, Forfeited	(97,142)
Number of Options, Outstanding, end of period	4,636,085
Number of Options, Expected to vest	1,769,386
Number of Options, Exercisable, years	1,327,095
Weighted-Average Exercise Price Per Option, Outstanding, beginning of period	$ 28.89
Weighted-Average Exercise Price Per Option, Granted	$ 79.55
Weighted-Average Exercise Price Per Option, Exercised	$ 30.62
Weighted-Average Exercise Price Per Option, Forfeited	$ 57.18
Weighted-Average Exercise Price Per Option, Outstanding, end of period	$ 47.80
Weighted-Average Exercise Price Per Option, Expected to vest	$ 42.39
Weighted-Average Exercise Price Per Option, Exercisable	$ 30.98
Weighted-Average Remaining Contractual Term, Outstanding, years	8.0
Weighted-Average Remaining Contractual Term, Expected to vest, years	7.8
Weighted-Average Remaining Contractual Term, Exercisable, years	8.0
Aggregate Intrinsic Value, Outstanding	$ 157,024,199
Aggregate Intrinsic Value, Expected to vest	69,500,110
Aggregate Intrinsic Value, Exercisable	67,270,446
2003 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Granted	3,870,152
2003 Stock Option Plan [Member] | Performance Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding, beginning of period	2,166,628
Number of Options, Exercised	(645,443)
Number of Options, Outstanding, end of period	1,521,185
Number of Options, Exercisable, years	1,521,185
Weighted-Average Exercise Price Per Option, Outstanding, beginning of period	$ 11.43
Weighted-Average Exercise Price Per Option, Granted
Weighted-Average Exercise Price Per Option, Exercised	$ 10.40
Weighted-Average Exercise Price Per Option, Forfeited
Weighted-Average Exercise Price Per Option, Outstanding, end of period	$ 11.87
Weighted-Average Exercise Price Per Option, Exercisable	$ 11.87
Weighted-Average Remaining Contractual Term, Outstanding, years	3.0
Weighted-Average Remaining Contractual Term, Exercisable, years	3.0
Aggregate Intrinsic Value, Outstanding	106,178,713
Aggregate Intrinsic Value, Exercisable	106,178,713
2003 Stock Option Plan [Member] | Time Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding, beginning of period	703,129
Number of Options, Exercised	(128,104)
Number of Options, Outstanding, end of period	575,025
Number of Options, Exercisable, years	575,025
Weighted-Average Exercise Price Per Option, Outstanding, beginning of period	$ 10.11
Weighted-Average Exercise Price Per Option, Granted
Weighted-Average Exercise Price Per Option, Exercised	$ 9.11
Weighted-Average Exercise Price Per Option, Forfeited
Weighted-Average Exercise Price Per Option, Outstanding, end of period	$ 10.33
Weighted-Average Exercise Price Per Option, Exercisable	$ 10.33
Weighted-Average Remaining Contractual Term, Outstanding, years	2.6
Weighted-Average Remaining Contractual Term, Exercisable, years	2.6
Aggregate Intrinsic Value, Outstanding	41,022,284
Aggregate Intrinsic Value, Exercisable	41,022,284
2003 Stock Option Plan [Member] | Rollover Option Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding, beginning of period	117,436
Number of Options, Exercised	(33,000)
Number of Options, Outstanding, end of period	84,436
Number of Options, Exercisable, years	84,436
Weighted-Average Exercise Price Per Option, Outstanding, beginning of period	$ 4.00
Weighted-Average Exercise Price Per Option, Granted
Weighted-Average Exercise Price Per Option, Exercised	$ 5.35
Weighted-Average Exercise Price Per Option, Forfeited
Weighted-Average Exercise Price Per Option, Outstanding, end of period	$ 3.47
Weighted-Average Exercise Price Per Option, Exercisable	$ 3.47
Weighted-Average Remaining Contractual Term, Outstanding, years	0.8
Weighted-Average Remaining Contractual Term, Exercisable, years	0.8
Aggregate Intrinsic Value, Outstanding	6,602,895
Aggregate Intrinsic Value, Exercisable	$ 6,602,895

XML

Acquisitions (Preliminary Purchase Price Allocation Of Fair Value Of The Assets And Liabilities Assumed) (Details) (USD $) In Thousands	Dec. 06, 2010
Acquisitions [Abstract]
Current assets, excluding cash acquired	$ 109,305
Property, plant and equipment	48,997
Intangible assets	433,000
Goodwill	864,004
Total assets acquired	1,455,306
Current liabilities	42,186
Deferred tax liabilities	115,591
Other noncurrent liabilities	31,837
Total liabilities assumed	189,614
Net assets acquired	$ 1,265,692

XML

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Sep. 30, 2010
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	224,400,000	224,400,000
Common stock, shares issued	50,829,276	49,928,241
Treasury stock, shares	494,100	494,100

XML

Consolidated Statements Of Income (USD $) In Thousands, except Per Share data	3 Months Ended			12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Consolidated Statements Of Income [Abstract]
NET SALES	$ 342,953	[1]	$ 223,117	$ 1,206,021	$ 827,654	$ 761,552
COST OF SALES				544,836	354,588	332,206
GROSS PROFIT	193,016	[1]	132,371	661,185	473,066	429,346
SELLING AND ADMINISTRATIVE EXPENSES				133,711	94,918	80,018
AMORTIZATION OF INTANGIBLE ASSETS				40,339	15,079	13,928
INCOME FROM OPERATIONS				487,135	363,069	335,400
REFINANCING COSTS				72,454
INTEREST EXPENSE - Net				185,256	112,234	84,398
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES				229,425	250,835	251,002
INCOME TAX PROVISION				77,200	87,390	88,100
INCOME FROM CONTINUING OPERATIONS				152,225	163,445	162,902
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	3,082	[1]		19,909
NET INCOME	67,395	[1]	50,635	172,134	163,445	162,902
NET INCOME APPLICABLE TO COMMON STOCK				$ 169,323	$ 133,132	$ 162,902
Net earnings per share - see Note 5:
Net earnings per share from continuing operations - basic and diluted	$ 1.20	[1]		$ 2.80	$ 2.52	$ 3.10
Net earnings per share from discontinued operations-basic and diluted	$ 0.06	[1]		$ 0.37
Net earnings per share	$ 1.26	[1]	$ 0.96	$ 3.17	$ 2.52	$ 3.10
Cash dividends paid per common share					$ 7.65
Weighted-average shares outstanding:
Basic and diluted	53,333		52,923	53,333	52,923	52,539

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

XML

Income Taxes (Narrative) (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Income Taxes [Abstract]
Net tax loss carryforwards	$ 16.5
Net tax loss carryforwards, expiration dates	2013 to 2031
Income Tax Examination, Penalties and Interest Expense	0	0	0
Effect of unrecognized tax benefits on effective tax rate	7.0	1.3
Accrual for income tax penalties and interest	$ 1.2	$ 1.0

XML

Earnings Per Share (Two-Class Method) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended												12 Months Ended
	Sep. 30, 2011		Jul. 02, 2011		Apr. 02, 2011		Jan. 01, 2011		Sep. 30, 2010	Jul. 03, 2010	Apr. 03, 2010	Jan. 02, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Earnings Per Share (Two-Class Method) [Abstract]
Net income from continuing operations													$ 152,225	$ 163,445	$ 162,902
Less dividends paid on participating securities													(2,811)	(30,313)
Net income from continuing operations excluding dividends													149,414	133,132	162,902
Net income from discontinued operations	3,082	[1]	(2,088)	[1]	19,120	[1]	(205)	[1]					19,909
Net income applicable to common stock - basic and diluted													$ 169,323	$ 133,132	$ 162,902
Weighted average common shares outstanding													49,888	49,171	48,481
Vested options deemed participating securities													3,445	3,752	4,058
Total shares for basic and diluted earnings per share													53,333	52,923	52,539
Net earnings per share from continuing operations - basic and diluted	$ 1.20	[1]	$ 1.10	[1]	$ 0.69	[1]	$ (0.19)	[1]					$ 2.80	$ 2.52	$ 3.10
Net earnings per share from discontinued operations - basic and diluted	$ 0.06	[1]	$ (0.04)	[1]	$ 0.35	[1]							$ 0.37
Net earnings per share	$ 1.26	[1]	$ 1.06	[1]	$ 1.04	[1]	$ (0.19)	[1]	$ 0.96	$ 0.83	$ 0.72	$ 0.01	$ 3.17	$ 2.52	$ 3.10

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

XML

Fair Value Measurements (Carrying Amounts And Fair Values Of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2009	Sep. 30, 2008
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 376,183		$ 234,112		$ 190,167	$ 159,062
Other Non-Current Liabilities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap Liabilities, Carrying Amount	5,600	[1]		[1]
Interest rate swap Liabilities, Fair Value	5,600	[1]		[1]
Accrued Liabilities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap Liabilities, Carrying Amount			3,865	[2]
Interest rate swap Liabilities, Fair Value		[2]	3,865	[2]
New Term Loans [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Term loans, Carrying Amount	1,538,375		780,000
Term loans, Fair Value	1,496,000		762,000
7 3/4% Senior Subordinated Notes Due 2014 [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Subordinated Notes, Carrying Amount			991,646
Senior Subordinated Notes, Fair Value			1,010,000
Interest rate	7.75%
7 3/4% Senior Subordinated Notes Due 2018 [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Subordinated Notes, Carrying Amount	1,600,000
Senior Subordinated Notes, Fair Value	1,616,000
Interest rate	7.75%
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	376,183		234,112
Cash and cash equivalents, Fair Value	$ 376,183		$ 234,112

[1] Included in Other non-current liabilities on the Consolidated Balance Sheet.

[2] Included in Accrued liabilities on the Consolidated Balance Sheet.

XML

Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended												12 Months Ended
	Sep. 30, 2011		Jul. 02, 2011		Apr. 02, 2011		Jan. 01, 2011		Sep. 30, 2010	Jul. 03, 2010	Apr. 03, 2010	Jan. 02, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Net sales	$ 342,953	[1]	$ 325,209	[1]	$ 304,307	[1]	$ 233,552	[1]	$ 223,117	$ 214,182	$ 206,077	$ 184,278	$ 1,206,021	$ 827,654	$ 761,552
Gross Profit	193,016	[1]	183,149	[1]	157,874	[1]	127,146	[1]	132,371	122,433	115,203	103,059	661,185	473,066	429,346
Net income (loss) from continuing operations	64,313	[1]	58,368	[1]	36,697	[1]	(7,153)	[1]
Net income (loss) from discontinued operations	3,082	[1]	(2,088)	[1]	19,120	[1]	(205)	[1]					19,909
NET INCOME (LOSS)	67,395	[1]	56,280	[1]	55,817	[1]	(7,358)	[1]	50,635	44,005	38,045	30,758	172,134	163,445	162,902
Net earnings (loss) per share from continuing operations-basic and diluted	$ 1.20	[1]	$ 1.10	[1]	$ 0.69	[1]	$ (0.19)	[1]					$ 2.80	$ 2.52	$ 3.10
Net earnings (loss) per share from discontinued operations-basic and diluted	$ 0.06	[1]	$ (0.04)	[1]	$ 0.35	[1]							$ 0.37
Basic and diluted earnings (loss) per share	$ 1.26	[1]	$ 1.06	[1]	$ 1.04	[1]	$ (0.19)	[1]	$ 0.96	$ 0.83	$ 0.72	$ 0.01	$ 3.17	$ 2.52	$ 3.10
TransDigm Group [Member]
NET INCOME (LOSS)													$ 172,134	$ 163,445	$ 162,902

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

XML

Leases

12 Months Ended

Sep. 30, 2011

Leases [Abstract]

Leases

17. LEASES

TransDigm leases certain manufacturing facilities, equipment and vehicles with rental payments required through December 2020. Rental expense during the years ended September 30, 2011, 2010 and 2009 was $5.9 million, $4.2 million and $3.3 million, respectively.

Future minimum rental commitments at September 30, 2011 under operating leases having initial or remaining non-cancelable lease terms exceeding one year are $4.7 million in fiscal 2012, $3.3 million in fiscal 2013, $2.6 million in fiscal 2014, $1.8 million in fiscal 2015, $1.4 million in fiscal 2016, and $5.9 million thereafter.

XML

Stock-Based Compensation (Weighted Average Assumptions For All Options Granted) (Details)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Stock-Based Compensation [Abstract]
Risk-free interest rate, minimum	1.67%	2.45%	1.82%
Risk-free interest rate, maximum	2.53%	2.96%	2.68%
Expected life of options in years	6	6	6
Expected dividend yield of stock
Expected volatility of stock	40.00%	40.00%	35.00%

XML

Document And Entity Information (USD $)	12 Months Ended
	Sep. 30, 2011	Oct. 28, 2011	Apr. 02, 2011
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Trading Symbol	TDG
Entity Registrant Name	TransDigm Group INC
Entity Central Index Key	0001260221
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		50,344,439
Entity Public Float			$ 4,234,949,579
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes

XML

Description Of The Business (Details)	12 Months Ended
	Sep. 30, 2011
Description Of The Business [Abstract]
Percentage of ownership in subsidiary	100.00%
Interest rate of senior subordinated debt	7.75%

XML

Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Sep. 30, 2011

Accumulated Other Comprehensive Income (Loss) [Abstract]

Accumulated Other Comprehensive Income (Loss)

20. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Accumulated other comprehensive income (loss) consists of the following at September 30 (in thousands):

	2011			2010
Interest rate swap agreements, net of taxes of $2.1 million for 2011 and $1.4 million for 2010	$	(3,500	)	$	(2,423	)
Cumulative foreign currency translation adjustments		1,795			297
Pension liability adjustments, net of taxes of $1.0 million for 2011 and 2010		(1,572	)		(1,674	)
Total	$	(3,277	)	$	(3,800	)

XML

Supplemental Guarantor Information (Tables)

12 Months Ended

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2009

Supplemental Guarantor Information [Abstract]

Condensed Consolidating Balance Sheet

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	5,695	$	360,074	$	2,115	$	8,299		$	—		$	376,183
Trade accounts receivable—Net		—		11,183		170,420		8,484			(794	)		189,293
Inventories		—		23,311		233,726		8,264			16			265,317
Deferred income taxes		—		23,248		7,596		—			—			30,844
Prepaid expenses and other		—		2,571		5,451		633			—			8,655
Total current assets		5,695		420,387		419,308		25,680			(778	)		870,292
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		805,254		3,746,531		1,557,736		(8,494	)		(6,101,027	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,903		129,566		5,331			—			150,800
GOODWILL		—		81,736		2,478,780		35,231			—			2,595,747
TRADEMARKS AND TRADE NAMES		—		19,376		313,280		12,286			—			344,942
OTHER INTANGIBLE ASSETS—Net		—		8,760		459,615		15,049			—			483,424
DEBT ISSUE COSTS—Net		—		59,007		—		—			—			59,007
OTHER		—		2,415		7,010		(1	)		—			9,424
TOTAL ASSETS	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—	$	15,500	$	—	$	—		$	—		$	15,500
Accounts payable		—		8,071		49,944		4,889			(794	)		62,110
Accrued liabilities		—		52,525		65,178		2,609			—			120,312
Income taxes payable		—		5,561		3,155		221			—			8,937
Total current liabilities		—		81,657		118,277		7,719			(794	)		206,859
LONG-TERM DEBT		—		3,122,875		—		—			—			3,122,875
DEFERRED INCOME TAXES		—		199,610		110,841		—			—			310,451
OTHER NON-CURRENT LIABILITIES		—		26,717		35,785		—			—			62,502
Total liabilities		—		3,430,859		264,903		7,719			(794	)		3,702,687
STOCKHOLDERS' EQUITY		810,949		923,256		5,100,392		77,363			(6,101,011	)		810,949
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	4,884	$	226,200	$	3,028	$	—		$	234,112
Trade accounts receivable—Net		—		12,935		122,174		(648	)		134,461
Inventories		—		19,694		169,296		(234	)		188,756
Deferred income taxes		—		15,200		—		—			15,200
Prepaid expenses and other		—		7,837		3,142		—			10,979
Total current assets		4,884		281,866		297,640		(882	)		583,508
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		588,095		2,293,001		907,547		(3,788,643	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,248		84,365		—			99,613
GOODWILL		—		68,593		1,503,071		—			1,571,664
TRADEMARKS AND TRADE NAMES		—		19,376		168,180		—			187,556
OTHER INTANGIBLE ASSETS—Net		—		9,387		203,451		—			212,838
DEBT ISSUE COSTS—Net		—		18,649		—		—			18,649
OTHER		—		2,350		1,640		—			3,990
TOTAL ASSETS	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
Accounts payable	$	—	$	9,767	$	35,107	$	(648	)	$	44,226
Accrued liabilities		—		32,639		36,147		—			68,786
Total current liabilities		—		42,406		71,254		(648	)		113,012
LONG-TERM DEBT—Less current portion		—		1,771,646		—		—			1,771,646
DEFERRED INCOME TAXES		—		168,588		—		—			168,588
OTHER NON-CURRENT LIABILITIES		—		19,733		11,860		—			31,593
Total liabilities		—		2,002,373		83,114		(648	)		2,084,839
STOCKHOLDERS' EQUITY		592,979		706,097		3,082,780		(3,788,877	)		592,979
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818

Condensed Consolidating Statement Of Income

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	81,944		$	1,097,662	$	31,649		$	(5,234	)	$	1,206,021
COST OF SALES		—			46,438			479,536		24,334			(5,472	)		544,836
GROSS PROFIT		—			35,506			618,126		7,315			238			661,185
SELLING AND ADMINISTRATIVE EXPENSES		—			44,754			85,796		3,172			(11	)		133,711
AMORTIZATION OF INTANGIBLE ASSETS		—			624			37,900		1,815			—			40,339
INCOME (LOSS) FROM OPERATIONS		—			(9,872	)		494,430		2,328			249			487,135
REFINANCING COSTS		—			72,454			—		—			—			72,454
INTEREST EXPENSE—Net		—			183,175			777		1,304			—			185,256
EQUITY IN INCOME OF SUBSIDIARIES		(172,134	)		(345,158	)		—		—			517,292			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		172,134			79,657			493,653		1,024			(517,043	)		229,425
INCOME TAX PROVISION (BENEFIT)		—			(92,477	)		167,822		1,855			—			77,200
INCOME (LOSS) FROM CONTINUING OPERATIONS		172,134			172,134			325,831		(831	)		(517,043	)		152,225
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX		—			—			4,883		15,026			—			19,909
NET INCOME	$	172,134		$	172,134		$	330,714	$	14,195		$	(517,043	)	$	172,134

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	64,990		$	766,068	$	(3,404	)	$	827,654
COST OF SALES		—			36,398			320,288		(2,098	)		354,588
GROSS PROFIT		—			28,592			445,780		(1,306	)		473,066
SELLING AND ADMINISTRATIVE EXPENSES		—			31,130			65,088		(1,300	)		94,918
AMORTIZATION OF INTANGIBLE ASSETS		—			624			14,455		—			15,079
INCOME (LOSS) FROM OPERATIONS		—			(3,162	)		366,237		(6	)		363,069
INTEREST EXPENSE—NET		—			110,127			2,107		—			112,234
EQUITY IN INCOME OF SUBSIDIARIES		(163,445	)		(237,334	)		—		400,779			—
INCOME BEFORE INCOME TAXES		163,445			124,045			364,130		(400,785	)		250,835
INCOME TAX PROVISION (BENEFIT)		—			(39,400	)		126,790		—			87,390
NET INCOME	$	163,445		$	163,445		$	237,340	$	(400,785	)	$	163,445

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	68,660		$	694,730	$	(1,838	)	$	761,552
COST OF SALES		—			38,647			295,077		(1,518	)		332,206
GROSS PROFIT		—			30,013			399,653		(320	)		429,346
SELLING AND ADMINISTRATIVE EXPENSES		—			27,010			53,308		(300	)		80,018
AMORTIZATION OF INTANGIBLE ASSETS		—			624			13,304		—			13,928
INCOME FROM OPERATIONS		—			2,379			333,041		(20	)		335,400
INTEREST EXPENSE—NET		—			79,880			4,518		—			84,398
EQUITY IN INCOME OF SUBSIDIARIES		(162,902	)		(213,190	)		—		376,092			—
INCOME BEFORE INCOME TAXES		162,902			135,689			328,523		(376,112	)		251,002
INCOME TAX PROVISION (BENEFIT)		—			(27,213	)		115,313		—			88,100
NET INCOME	$	162,902		$	162,902		$	213,210	$	(376,112	)	$	162,902

Condensed Consolidating Statement Of Cash Flows

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$	—		$	(164,846	)	$	409,483		$	14,294		$	1,647		$	260,578
INVESTING ACTIVITIES:
Capital expenditures		—			(2,639	)		(15,140	)		(247	)		—			(18,026	)
Acquisition of businesses, net of cash acquired		—			(1,650,363	)		—			—			—			(1,650,363	)
Cash proceeds from sales of discontinued operations		—			271,361			—			—			—			271,361
Net cash used in investing activities		—			(1,381,641	)		(15,140	)		(247	)		—			(1,397,028	)
FINANCING ACTIVITIES:
Intercompany activities		(28,997	)		431,648			(395,256	)		(5,748	)		(1,647	)		—
Excess tax benefits related to share-based payment arrangements		23,411			—			—			—			—			23,411
Proceeds from exercise of stock options		9,208			—			—			—			—			9,208
Dividends paid		(2,811	)		—			—			—			—			(2,811	)
Proceeds from new senior secured credit facility—net		—			1,500,048			—			—			—			1,500,048
Repayment on new senior secured credit facility		—			(11,625	)		—			—			—			(11,625	)
Proceeds from 2018 senior subordinated notes—net		—			1,582,184			—			—			—			1,582,184
Repurchase of 2014 senior subordinated notes		—			(1,041,894	)		—			—			—			(1,041,894	)
Repayment of previous senior secured credit facility		—			(780,000	)		—			—			—			(780,000	)
Net cash provided by (used in) financing activities		811			1,680,361			(395,256	)		(5,748	)		(1,647	)		1,278,521
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		811			133,874			(913	)		8,299			—			142,071
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		4,884			226,200			3,028			—			—			234,112
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	5,695		$	360,074		$	2,115		$	8,299		$	—		$	376,183

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations			Total Consolidated
OPERATING ACTIVITIES	$	—		$	(53,873	)	$	251,175		$	2		$	197,304
INVESTING ACTIVITIES:
Capital expenditures		—			(1,875	)		(11,012	)		—			(12,887	)
Acquisition of businesses, net of cash acquired		—			(166,557	)		—			—			(166,557	)
Proceeds from sale of real estate		—			—			2,885						2,885
Net cash used in investing activities		—			(168,432	)		(8,127	)		—			(176,559	)
FINANCING ACTIVITIES:
Intercompany activities		370,544			(129,373	)		(241,169	)		(2	)		—
Excess tax benefits related to share-based payment arrangements		17,459			—			—			—			17,459
Proceeds from exercise of stock options		6,361			—			—			—			6,361
Dividends paid		(404,868	)		—			—			—			(404,868	)
Proceeds from senior subordinated notes-net		—			404,248			—			—			404,248
Net cash provided by (used in) financing activities		(10,504	)		274,875			(241,169	)		(2	)		23,200
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(10,504	)		52,570			1,879			—			43,945
CASH AND CASH EQUIVALENTS—
Beginning of year		15,388			173,630			1,149			—			190,167
CASH AND CASH EQUIVALENTS—
End of year	$	4,884		$	226,200		$	3,028		$	—		$	234,112

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations		Total Consolidated
OPERATING ACTIVITIES	$	—		$	(29,358	)	$	226,470		$	—	$	197,112
INVESTING ACTIVITIES:
Capital expenditures		—			(2,370	)		(10,785	)		—		(13,155	)
Acquisition of businesses, net of cash acquired		—			(155,233	)		—			—		(155,233	)
Net cash used in investing activities		—			(157,603	)		(10,785	)		—		(168,388	)
FINANCING ACTIVITIES:
Intercompany activities		11,455			199,911			(211,366	)		—		—
Excess tax benefits related to share-based payment arrangements		9,278			—			—			—		9,278
Proceeds from exercise of stock options		8,345			—			—			—		8,345
Purchase of treasury stock		(15,242	)		—			—			—		(15,242	)
Net cash provided by (used in) financing activities		13,836			199,911			(211,366	)		—		2,381
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		13,836			12,950			4,319			—		31,105
CASH AND CASH EQUIVALENTS—
Beginning of year		1,552			160,680			(3,170	)		—		159,062
CASH AND CASH EQUIVALENTS—
End of year	$	15,388		$	173,630		$	1,149		$	—	$	190,167

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Capital Stock (Details) (USD $) In Millions, except Share data	0 Months Ended		12 Months Ended
	Oct. 23, 2011	Oct. 23, 2008	Sep. 30, 2011	Sep. 30, 2010
Capital Stock [Abstract]
Common stock, shares authorized			224,400,000	224,400,000
Common stock, par value			$ 0.01	$ 0.01
Preferred stock, shares authorized			149,600,000
Preferred stock, par value			$ 0.01
Common stock, shares outstanding			50,829,276	49,928,241
Preferred stock, shares outstanding			0	0
Stock repurchase program, authorized amount	$ 100
Shares repurchased under the program			0
Treasury stock, shares		494,100	494,100	494,100
Value of common stock repurchased		$ 15.2

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Sales And Trade Accounts Receivable

12 Months Ended

Sep. 30, 2011

Sales And Trade Account Receivable [Abstract]

Sales And Trade Accounts Receivable

6. SALES AND TRADE ACCOUNTS RECEIVABLE

Sales—The Company's sales and receivables are concentrated in the aerospace industry. TransDigm's customers include: distributors of aerospace components; commercial airlines, large commercial transport and regional and business aircraft OEMs; various armed forces of the United States and friendly foreign governments; defense OEMs; system suppliers; and various other industrial customers.

One customer accounted for approximately 14%, 14% and 13% of the Company's net sales for the years ended September 30, 2011, 2010 and 2009, respectively. Export sales to customers, primarily in Western Europe, Canada and Asia, were $305.5 million during fiscal 2011, $170.6 million during fiscal 2010 and $150.4 million during fiscal 2009.

Information concerning the Company's net sales by its major product offerings is as follows for the periods indicated below (in thousands):

	Years Ended September 30,
	2011		2010		2009
Mechanical/electro-mechanical actuators and controls	$	168,530	$	124,574	$	123,193
Ignition systems, engine sensors, harnesses and related components		153,919		111,834		96,758
Engineered latching and locking devices		150,111		33,746		34,663
Specialized valves		102,664		95,946		55,357
Rods and locking devices		99,556		31,438		29,328
AC/DC electric motors and generators		84,213		57,410		66,584
Specialized pumps		72,116		66,893		71,645
Power conditioning devices		58,683		57,917		57,957
Engineered connectors		57,803		43,945		46,697
NiCad batteries/chargers		57,757		45,583		25,337
Power, lighting and control		55,327		44,849		40,291
Audio systems		44,614		36,870		33,112
Lavatory hardware		38,280		27,753		27,825
Specialized cockpit displays		27,405		27,851		30,861
Elastomers		24,141		21,045		21,944
Other		10,902		—		—
Total	$	1,206,021	$	827,654	$	761,552

Trade Accounts Receivable—Trade accounts receivable consist of the following at September 30 (in thousands):

	2011			2010
Trade accounts receivable—gross	$	192,166		$	136,731
Allowance for uncollectible accounts		(2,873	)		(2,270	)
Trade accounts receivable—net	$	189,293		$	134,461

At September 30, 2011, approximately 10% of the Company's trade accounts receivable was due from one customer. In addition, approximately 30% of the Company's trade accounts receivable was due from entities that principally operate outside of the United States. Credit is extended based on an evaluation of each customer's financial condition and collateral is generally not required.

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Discontinued Operations

12 Months Ended

Sep. 30, 2011

Discontinued Operations [Abstract]

Discontinued Operations

21. DISCONTINUED OPERATIONS

On March 9, 2011, the Company completed the divestiture of its fastener business for approximately $239.6 million in cash, subject to adjustments based on the level of working capital as of the closing date. The Company recorded a gain on sale of the fastener business of approximately $23.6 million, net of tax of $56.5 million. This business, which was acquired as part of the McKechnie Aerospace acquisition, is made up of Valley-Todeco, Inc. and Linread Ltd. The business designs and manufactures fasteners, fastening systems and bearings for commercial, military and general aviation aircraft.

On April 7, 2011, the Company completed the divestiture of Aero Quality Sales ("AQS") to Satair A/S for approximately $31.8 million in cash, which includes a $1.8 million working capital adjustment received in the third quarter of fiscal 2011. The Company recorded a loss on the sale of AQS of approximately $1.6 million, net of tax of $6.2 million. AQS, which was acquired as part of the McKechnie Aerospace acquisition, is a distributor and service center of aircraft batteries and battery support equipment. The Company's Chairman and Chief Executive Officer, W. Nicholas Howley, was a director of Satair A/S from 2006 through October 2011.

The sales of the fastener business and AQS have been accounted for as discontinued operations and accordingly the consolidated statements of income have classified the operating results to reflect discontinued operations presentation. The following is the summarized operating results for the fastener business and AQS for the fiscal year ended September 30, 2011 (in thousands).

	Fiscal Year Ended September 30, 2011
Net sales	$	24,058
Loss from discontinued operations before income taxes	$	(2,917	)
Income tax benefit		794
Loss from discontinued operations		(2,123	)
Net gain on sales of discontinued operations, net of tax		22,032
Income from discontinued operations	$	19,909

 

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Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Carrying Amounts And Fair Values Of Financial Instruments

	Level		2011				2010
			Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents		1	$	376,183	$	376,183	$	234,112	$	234,112
Liabilities:
Interest rate swaps(1)		2		5,600		5,600		—		—
Interest rate swap(2)		2		—		—		3,865		3,865
Long-term debt:
Term loans		2		1,538,375		1,496,000		780,000		762,000
7 3/4% Senior Subordinated Notes due 2018		1		1,600,000		1,616,000		—		—
7 3/4% Senior Subordinated Notes due 2014		1		—		—		991,646		1,010,000

(1) Included in Other non-current liabilities on the Consolidated Balance Sheet.

(2) Included in Accrued liabilities on the Consolidated Balance Sheet.

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Accrued Liabilities (Tables)

12 Months Ended

Sep. 30, 2011

Accrued Liabilities [Abstract]

Schedule Of Accrued Liabilities

	2011		2010
Compensation and related benefits	$	24,824	$	18,146
Interest		37,065		17,747
Product warranties		8,722		8,345
Other		49,701		24,548
Total	$	120,312	$	68,786

Schedule Of Product Warranty Liability

	Years Ended September 30,
	2011			2010			2009
Liability balance at beginning of period	$	8,345		$	9,419		$	6,255
Product warranty provision		2,217			880			3,921
Warranty costs incurred		(2,501	)		(2,457	)		(3,004	)
Acquisitions		661			503			2,247
Liability balance at end of period	$	8,722		$	8,345		$	9,419

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Derivatives And Hedging Activities

12 Months Ended

Sep. 30, 2011

Derivatives And Hedging Activities [Abstract]

Derivatives And Hedging Activities

19. DERIVATIVES AND HEDGING ACTIVITIES

The Company is exposed to, among other things, the impact of changes in interest rates in the normal course of business. The Company's risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks, and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties.

Interest rate swap agreements are used to manage interest rate risk associated with floating-rate borrowings under our New Senior Secured Credit Facility. The interest rate swap agreements utilized by the Company effectively modify the Company's exposure to interest rate risk by converting a portion of the Company's floating-rate debt to a fixed rate basis through the expiration date of the interest rate swap agreements, thereby reducing the impact of interest rate changes on future interest expense. These agreements involve the receipt of floating rate amounts in exchange for fixed rate interest payments over the term of the agreements without an exchange of the underlying principal amount. These derivative instruments qualify as effective cash flow hedges under GAAP. For these hedges, the effective portion of the gain or loss from the financial instruments is initially reported as a component of accumulated other comprehensive income (loss) in stockholders' equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affects earnings.

At September 30, 2011, three forward-starting interest rate swap agreements were in place to swap variable rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million. Beginning December 31, 2012, these interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the New Senior Secured Credit Facility to a fixed rate of 5.17% (2.17% plus the 3% margin percentage) through June 30, 2015.

At September 30, 2010, an agreement was in place to swap variable interest rates on the previous senior secured credit facility for a fixed interest rate on a notional amount of $300 million through March 23, 2011. This interest rate swap agreement effectively converted the variable rate interest on the notional amount of the previous senior secured credit facility to a fixed rate of 5.04% (3.04% plus the 2% margin percentage) over the term of the agreement. The interest rate swap agreement was terminated in December 2010 in conjunction with the repayment of the outstanding term loan balance under the previous senior secured credit facility.

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Debt

12 Months Ended

Sep. 30, 2011

Debt [Abstract]

Debt

11. DEBT

The Company's long-term debt consists of the following at September 30 (in thousands):

	2011		2010
Term loans	$	1,538,375	$	780,000
Senior Subordinated Notes due 2018		1,600,000		—
Senior Subordinated Notes due 2014		—		991,646
		3,138,375		1,771,646
Less current portion		15,500		—
Long-term debt	$	3,122,875	$	1,771,646

Revolving Credit Facility and Term Loan—In December 2010, TD Group's wholly owned subsidiary, TransDigm Inc., entered into a senior secured credit facility, which consisted of a $1.55 billion term loan facility and a $245 million revolving credit facility (collectively, the "Existing Senior Secured Credit Facility"). The proceeds of the term loan were used to pay the purchase price of and related transaction expenses associated with the acquisition of McKechnie Aerospace and repay a portion of the amounts outstanding under the previous senior secured credit facility. The remaining amount of the previous senior secured credit facility was repaid from a portion of the 7 ³/4% Senior Subordinated Notes due 2018 (the "2018 Notes") proceeds.

On February 14, 2011, TransDigm Inc. entered into a new senior secured credit facility which provides for a $1.55 billion term loan facility (the "New Senior Secured Credit Facility"), which was fully drawn on February 14, 2011. The New Senior Secured Credit Facility replaced the term loan under the Existing Senior Secured Credit Facility and modified certain terms of the original agreement including extending the maturity date of the term loan and modifying the interest rate provisions.

On March 25, 2011, TransDigm entered into Amendment No. 1 (the "Amendment") to the Existing Senior Secured Credit Facility. The Amendment provides for a modification to certain terms of the permitted indebtedness covenant contained in the Existing Senior Secured Credit Facility to modify the requirements for incurring certain additional senior indebtedness.

Under the terms of the New Senior Secured Credit Facility, TransDigm is entitled on one or more occasions, subject to the satisfaction of certain conditions, to request additional term loans under the New Senior Secured Credit Facility in the aggregate principal amount of up to $500 million (less any increase in the commitments under the revolving credit facility and/or additional term loans under the term loan facility under the Existing Senior Secured Credit Facility) to the extent that existing or new lenders agree to provide such additional term loans.

At September 30, 2011, the Company had $8.0 million letters of credit outstanding and $237.0 million of borrowings available under the Existing Senior Secured Credit Facility, as amended. Under the Existing Senior Secured Credit Facility, the revolving credit facility matures in December 2015.

Under the New Senior Secured Credit Facility, the term loan matures in February 2017. The term loan under the New Senior Secured Credit Facility requires quarterly principal payments of $3.9 million that began on March 31, 2011.

The interest rates per annum applicable to the term loan under the New Senior Secured Credit Facility will be, at TransDigm's option, equal to either an alternate base rate or an adjusted LIBO rate for one, two, three or six-month (or to the extent agreed to by each relevant lender, nine or twelve-month) interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The adjusted LIBO rate is subject to a floor of 1%. At September 30, 2011, the applicable interest rate on the term loan was 4.0%.

On June 27, 2011, the Company entered into three forward-starting interest rate swap agreements beginning December 31, 2012 to hedge the variable interest rates on the New Senior Secured Credit Facility for a fixed rate based on an aggregate notional amount of $353 million through June 30, 2015. These forward-starting interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the New Senior Secured Credit Facility to a fixed rate of 5.17% over the term of the interest rate swap agreements.

Under the terms of the New Senior Secured Credit Facility, the Company is required to pay the administrative agent certain fees. In addition, under the Existing Senior Secured Credit Facility, on the last day of each calendar quarter the Company is required to pay a commitment fee equal to the applicable rate per annum in effect from time to time of any unused commitments under the revolving credit line and certain other fees in respect of letters of credit that may be outstanding thereunder from time to time.

All of the indebtedness outstanding under the credit facilities is guaranteed by TD Group and all of TransDigm's current and future domestic restricted subsidiaries (other than immaterial subsidiaries), and is secured by a first priority security interest in substantially all of the existing and future property and assets, including inventory, equipment, general intangibles, intellectual property, investment property and other personal property (but excluding leasehold interests and certain other assets) of TransDigm and all of TransDigm's existing and future domestic restricted subsidiaries (other than immaterial subsidiaries), and a first priority pledge of the capital stock of TransDigm and its domestic subsidiaries and 65% of the voting capital stock of certain of TransDigm's foreign subsidiaries.

The credit facilities contain certain covenants that limit the ability of TD Group, TransDigm and TransDigm's restricted subsidiaries to, among other things, incur or guarantee additional indebtedness or issue preferred stock, pay distributions on, redeem or repurchase capital stock or redeem or repurchase subordinated debt, make investments, sell assets, enter into agreements that restrict distributions or other payments from restricted subsidiaries to TransDigm, incur or suffer to exist liens securing indebtedness, consolidate, merge or transfer all or substantially all of their assets, and engage in transactions with affiliates. At September 30, 2011, TransDigm was in compliance with all of the covenants contained in the credit facilities.

The term loan under the New Senior Secured Credit Facility requires mandatory prepayments of principal based on certain percentages of Excess Cash Flow (as therein defined), commencing 90 days after the end of each fiscal year, commencing with the fiscal year ending September 30, 2012, subject to certain exceptions. In addition, subject to certain exceptions (including, with respect to asset sales, the reinvestment in productive assets), TransDigm will be required to prepay the loans outstanding under the term loan facility at 100% of the principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of certain asset sales and issuance or incurrence of certain indebtedness. In addition, if, prior to February 14, 2012, the principal amount of the term loans are (i) prepaid substantially concurrently with the incurrence by TD Group, TransDigm or any of its subsidiaries of new bank loans that have an effective yield lower than the yield in effect on the term loans so prepaid or (ii) received by a lender due to a mandatory assignment following the failure of such lender to consent to an amendment of the New Senior Secured Credit Facility that has the effect of reducing the effective interest rate with respect to the term loans, such prepayment or receipt shall be accompanied by a premium of 1.0%.

Senior Subordinated Notes—In December 2010, TransDigm issued $1.6 billion in aggregate principal amount of its 2018 Notes at an issue price of 100% of the principal amount. The 2018 Notes represent unsecured obligations of TransDigm Inc. ranking subordinate to TransDigm Inc.'s senior debt, as defined in the indenture governing the 2018 Notes. Interest under the 2018 Notes is payable semi-annually.

Prior to December 15, 2013, TransDigm is permitted to redeem specified percentages of the 2018 Notes from the proceeds of equity offerings at a redemption price of 107.75%, plus accrued and unpaid interest. The 2018 Notes are redeemable by TransDigm, in whole or in part, at specified redemption prices, which decline from 103.875% to 100% over the remaining term of the 2018 Notes, plus accrued and unpaid interest. If a change in control of the Company occurs, the holders of the 2018 Notes will have the right to demand that TransDigm redeem the 2018 Notes at a purchase price equal to 101% of the principal amount of the 2018 Notes plus accrued and unpaid interest. The 2018 Notes contain many of the same restrictive covenants included in the New Senior Secured Credit Facility. TransDigm is in compliance with all of the covenants contained in the 2018 Notes.

TransDigm utilized a portion of the proceeds from the 2018 Notes to purchase its 7 ³/4% Senior Subordinated Notes due 2014 (the "2014 Notes").

The Company recorded refinancing costs of $72.5 million during the fiscal year ended September 30, 2011 representing charges resulting from the refinancing of TransDigm's entire debt structure. The charge for the fiscal year ended September 30, 2011 consisted of the premium of $41.9 million paid to redeem the 2014 Notes, the write-off of debt issue costs and unamortized note premium and discount of $25.7 million, and the settlement of the interest rate swap agreement and other expenses of $4.9 million.

At September 30, 2011, future maturities of long-term debt are as follows (in thousands):

Years ended September 30,
2012	$	15,500
2013		15,500
2014		15,500
2015		15,500
2016		15,500
Thereafter		3,060,875
	$	3,138,375

Special Cash Dividend Payment—In October 2009, TransDigm made a special cash dividend to its stockholders of $7.65 per share and cash dividend equivalents payments ("Dividend Equivalent Payments") to holders of options to purchase its common stock from the net proceeds of the $425 million Senior Subordinated Notes due 2014 issued in October 2009. After the payment of debt issue fees and expenses, the net proceeds amounted to approximately $404.5 million. The special cash dividend and Dividend Equivalent Payments of $404.9 million were paid in the first quarter of fiscal 2010 and Dividend Equivalent Payments of $2.8 million were paid in the first quarter of fiscal 2011. The $425 million of 2014 Notes were included in the tender offer made in conjunction with the 2018 Notes issuance.

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Acquisitions

12 Months Ended

Sep. 30, 2011

Acquisitions [Abstract]

Acquisitions

2. ACQUISITIONS

Schneller Holdings—On August 31, 2011, TransDigm Inc. acquired all of the outstanding equity interests in Schneller Holdings LLC ("Schneller") for approximately $288.5 million in cash, subject to adjustments based on the level of working capital as of the closing date of the acquisition. Schneller designs and manufactures proprietary, highly engineered laminates, thermoplastics, and non-textile flooring for use primarily on side walls, lavatories, galleys, bulkheads and cabin floors for commercial aircraft. These products fit well with TransDigm's overall business direction. The Company expects that the approximately $195 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Talley Actuation—On December 31, 2010, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired the actuation business of Telair International Inc. ("Talley Actuation"), a wholly-owned subsidiary of Teleflex Incorporated, for approximately $93.6 million in cash, which includes a purchase price adjustment of $0.3 million received in the third quarter of fiscal 2011. Talley Actuation manufactures proprietary, highly engineered electro-mechanical products and other components for commercial and military aircraft. These products fit well with TransDigm's overall business direction. The Company expects that the approximately $70 million of goodwill recognized for the acquisition will be deductible for tax purposes.

McKechnie Aerospace Holdings, Inc.—On December 6, 2010, TransDigm Inc. acquired all of the outstanding stock of McKechnie Aerospace Holdings Inc. ("McKechnie Aerospace"), for approximately $1.27 billion in cash, which includes a purchase price adjustment of $0.3 million paid in the third quarter of fiscal 2011. McKechnie Aerospace, through its subsidiaries, is a leading global designer, producer and supplier of aerospace components, assemblies and subsystems for commercial aircraft, regional/business jets, military fixed wing and rotorcraft. Some of the businesses acquired as part of McKechnie Aerospace have been divested. See Note 21 to the Consolidated Financial Statements. The remaining products fit well with TransDigm's overall business direction.

The Company financed the McKechnie Aerospace acquisition, repaid borrowings under the previous senior secured credit facility and redeemed outstanding 7 ³/4% Senior Subordinated Notes due 2014 through a combination of the offering of $1.60 billion of 7 ³/4% Senior Subordinated Notes due 2018 and new term loan borrowings of $1.55 billion due 2017. See Note 11 to the Consolidated Financial Statements.

The total purchase price was allocated to the underlying assets acquired and liabilities assumed based upon management's estimated fair values at the date of acquisition. The consolidated balance sheet at September 30, 2011 reflects the preliminary purchase price allocation for the business; therefore, the values attributed to the assets acquired and liabilities assumed in the consolidated financial statements are subject to adjustment. To the extent the purchase price exceeded the estimated fair value of the net identifiable tangible and intangible assets acquired, such excess was allocated to goodwill.

The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed at the transaction date (in thousands).

Assets acquired:
Current assets, excluding cash acquired	$	109,305
Property, plant and equipment		48,997
Intangible assets		433,000
Goodwill		864,004
Total assets acquired	$	1,455,306
Liabilities assumed:
Current liabilities	$	42,186
Deferred tax liabilities		115,591
Other noncurrent liabilities		31,837
Total liabilities assumed	$	189,614
Net assets acquired	$	1,265,692

The Company expects that the approximately $864.0 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

The results of operations of McKechnie Aerospace are included in the Company's consolidated financial statements from the date of the transaction. The Company recorded net sales of $212.2 million from the date of acquisition through September 30, 2011. It is impracticable to determine a meaningful measure of the earnings of the acquired business from the date of acquisition through September 30, 2011 because certain McKechnie Aerospace plant facilities have been integrated into other TransDigm operations. Had the McKechnie acquisition and related financing transactions occurred at the beginning of the fiscal year ended September 30, 2010, unaudited pro forma consolidated results for the years ended September 30, 2011 and 2010 would have been as follows (in thousands, except per share data):

	Fiscal Years Ended September 30,
	2011		2010
Net sales	$	1,247,386	$	1,033,059
Net income applicable to common stock from continuing operations	$	217,575	$	44,614
Net earnings per share from continuing operations:
Basic and diluted	$	4.08	$	0.84

The unaudited pro forma consolidated results are based on the Company's historical financial statements and those of McKechnie Aerospace and do not necessarily indicate the results of operations that would have resulted had the acquisition actually been completed at the beginning of the applicable period presented. The pro forma financial information assumes that the companies were combined as of October 1, 2009. The pro forma results for the fiscal year ended September 30, 2010 reflect the business combination accounting effects from the acquisition including amortization charges from the acquired intangible assets, inventory purchase accounting adjustments charged to cost of sales as the inventory is sold, increase in interest expense associated with debt incurred to fund the acquisition, refinancing costs associated with the refinancing of the Company's entire debt structure and acquisition-related transaction costs. The unaudited pro forma consolidated results do not give effect to the synergies of the acquisition and are not indicative of the results of operations in future periods.

Semco Instruments—On September 3, 2010, TransDigm Inc. completed the acquisition of Semco Instruments, Inc. ("Semco Instruments") for approximately $73.6 million in cash, which includes a purchase price adjustment of $3.0 million paid in the first quarter of fiscal 2011. Semco Instruments manufactures proprietary, highly engineered components for major turbo-prop, turbo-fan, and turbo-shaft engines, which are primarily used on helicopters, business jets and selected regional airplanes. These products fit well with TransDigm's overall business direction. The Company expects that the approximately $41 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

Dukes Aerospace—On December 2, 2009, Dukes Aerospace, Inc., a newly formed, wholly owned subsidiary of TransDigm Inc., acquired substantially all of the aerospace related assets and certain liabilities from Dukes, Inc. and GST Industries, Inc. (collectively "Dukes Aerospace") for approximately $95.5 million in cash, which includes a purchase price adjustment of $0.2 million received in the third quarter of fiscal 2011. In addition, the agreement provides for potential earn-out payments up to a total of $60 million over four years based on the achievement of certain growth targets. The initial purchase price allocation included a fair value liability of $8.0 million recorded for the potential earn-out payments. During the third quarter of fiscal 2011, the Company reversed $3.0 million of the earn-out liability based on lower growth projections relative to the required growth targets for the last three years of the four-year earn-out arrangement. The reversal of earn-out liability is included in selling and administrative expenses in the consolidated statements of income for the fiscal year ended September 30, 2011. The Dukes Aerospace business supplies proprietary, highly engineered components primarily to the business jet, regional jet, and military aerospace markets, along with commercial and military helicopter markets. The products are comprised primarily of highly engineered valves and certain pumps, solenoids and related components. These products fit well with TransDigm's overall business direction. The Company expects that the approximately $64 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Woodward HRT Product Line—On August 10, 2009, AeroControlex Group, Inc., a wholly owned subsidiary of TransDigm Inc., acquired certain product line assets of Woodward HRT, Inc., a subsidiary of Woodward Governor Company ("Woodward HRT product line") for approximately $48.7 million in cash, which includes a purchase price adjustment of $0.7 million paid in February 2010. The product line comprises a range of highly engineered fuel and pneumatic valves and surge suppressors, the majority of which are used on military rotary and fixed wing aircraft, all of which fit well with TransDigm's overall business direction. Woodward Governor recently acquired this business as part of its acquisition of HR Textron, Inc. The Company expects that the $27 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Acme Aerospace—On July 24, 2009, TransDigm Inc. acquired all of the outstanding capital stock of Acme Aerospace, Inc. ("Acme") for approximately $40.9 million in cash, which includes a purchase price adjustment of $0.2 million paid in October 2009. Acme is a designer and manufacturer of proprietary, highly engineered components to the commercial aerospace industry, comprising primarily fibrous nickel cadmium main ship batteries, battery chargers, battery back-up systems and power conversion equipment. These products fit well with TransDigm's overall business direction. The Company expects that the $32 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

Aircraft Parts Corporation—On December 16, 2008, TransDigm Inc. acquired all of the outstanding capital stock of Aircraft Parts Corporation ("APC") for approximately $66.9 million in cash, net of a purchase price adjustment of $0.7 million received in November 2009. APC is a designer and manufacturer of starter generators, generator control units and related components for turbine engines, all of which fit well with TransDigm's overall business direction. The Company expects that the $50 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

The Company accounted for the acquisitions of McKechnie Aerospace, Schneller, Talley Actuation, Semco Instruments, Dukes Aerospace, the Woodward HRT product line, Acme and APC, (collectively, the "Acquisitions") using the acquisition method and included the results of operations of the Acquisitions in its consolidated financial statements from the effective date of each acquisition. The Company is in the process of obtaining a third-party valuation of certain tangible and intangible assets of Schneller and, therefore, the values attributed to those acquired assets in the consolidated financial statements are subject to adjustment. Pro forma net sales and results of operations for the acquisitions of Schneller, Talley Actuation, Semco Instruments, Dukes Aerospace, the Woodward HRT product line, Acme and APC had they occurred at the beginning of the applicable fiscal year ended September 30, 2011 or 2010, are not significant and, accordingly, are not provided.

The Acquisitions strengthen and expand the Company's position to design, produce and supply highly-engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategies (obtaining profitable new business, improving our cost structure, and providing highly engineered value-added products to customers). The purchase price paid for each acquisition reflects the current earnings before interest, taxes, depreciation and amortization (EBITDA) and cash flows, as well as, the future EBITDA and cash flows expected to be generated by the business, which are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 30 years.

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Inventories (Tables)

12 Months Ended

Sep. 30, 2011

Inventories [Abstract]

Components Of Inventories

	2011			2010
Raw materials and purchased component parts	$	160,402		$	112,249
Work-in-progress		85,612			61,487
Finished Goods		43,192			31,251
Total		289,206			204,987
Reserves for excess and obsolete inventory and LIFO		(23,889	)		(16,231	)
Inventories—net	$	265,317		$	188,756

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Property, Plant And Equipment

12 Months Ended

Sep. 30, 2011

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment

8. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following at September 30 (in thousands):

	2011			2010
Land and improvements	$	40,912		$	29,734
Buildings and improvements		58,692			43,314
Machinery, equipment and other		137,124			99,052
Construction in progress		8,250			5,012
Total		244,978			177,112
Accumulated depreciation		(94,178	)		(77,499	)
Property, plant and equipment—net	$	150,800		$	99,613

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Income Taxes

12 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

13. INCOME TAXES

The Company's income tax provision on income from continuing operations consists of the following for the periods shown below (in thousands):

	Fiscal Years Ended September 30,
	2011		2010		2009
Current
Federal	$	50,105	$	78,591	$	71,700
State		7,109		6,899		7,600
Foreign		1,310		—		—
		58,524		85,490		79,300
Deferred		18,676		1,900		8,800
	$	77,200	$	87,390	$	88,100

The differences between the income tax provision on income from continuing operations at the federal statutory income tax rate and the tax provision shown in the accompanying consolidated statements of income for the periods shown below are as follows (in thousands):

	Fiscal Years Ended September 30,
	2011			2010			2009
Tax at statutory rate of 35%	$	80,299		$	87,792		$	87,851
State and local income taxes, net of federal benefit		3,576			4,298			5,524
Domestic manufacturing deduction		(2,772	)		(3,981	)		(4,280	)
Research and development credits		(2,303	)		(300	)		(1,650	)
Other—net		(1,600	)		(419	)		655
Income tax provision	$	77,200		$	87,390		$	88,100

The components of the deferred taxes consist of the following at September 30 (in thousands):

	2011			2010
Deferred tax assets:
Net operating losses	$	16,500		$	6,125
Employee benefits, compensation and other accrued obligations		16,059			11,186
Inventory		10,715			4,960
Environmental		7,412			—
Product warranties		3,534			3,121
Interest rate swaps		2,087			1,440
Other accrued liabilities		4,692			3,688
Total		60,999			30,520
Less: Valuation allowance		(15,874	)		(6,097	)
Total deferred tax assets		45,125			24,423
Deferred tax liabilities:
Intangible assets		302,273			163,122
Property, plant and equipment		22,459			13,563
Other		—			1,126
Total deferred tax liabilities		324,732			177,811
Total net deferred tax liabilities	$	279,607		$	153,388

At September 30, 2011, the Company had state and United Kingdom net tax loss carryforwards which generate a tax benefit of approximately $16.5 million that expire in various years from 2013 to 2031. A valuation allowance has been established equal to the amount of the net operating losses that the Company believes will not be utilized.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, various state and local jurisdictions as well as foreign jurisdictions located in Belgium, Malaysia, Mexico, France, Singapore and the United Kingdom. The Company is subject to U.S. federal examination for the 2008, 2009 and 2010 years.

The Company has not provided an estimate for any U.S. or additional foreign taxes on undistributed earnings of foreign subsidiaries that might be payable if these earnings were repatriated since the Company considers these amounts to be permanently reinvested.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	2011			2010
Balance at beginning of period	$	1,832		$	3,253
Additions based on tax positions related to the current year		129			40
Reductions for tax positions of prior years		(760	)		(1,461	)
Acquisitions		6,367			—
Balance at end of period	$	7,568		$	1,832

Unrecognized tax benefits at September 30, 2011 and 2010, the recognition of which would have an effect on the effective tax rate for each fiscal year, amounted to $7.0 million and $1.3 million, respectively. The Company classifies all income tax related interest and penalties as income tax expense, which were not significant for the years ended September 30, 2011, 2010 and 2009. As of September 30, 2011 and 2010, the Company accrued $1.2 million and $1.0 million, respectively, for the potential payment of interest and penalties. The Company anticipates no significant changes to its total unrecognized tax benefits through fiscal 2012.

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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Income Taxes [Abstract]
Statutory Tax Rate	35.00%
Tax at statutory rate of 35%	$ 80,299	$ 87,792	$ 87,851
State and local income taxes, net of federal benefit	3,576	4,298	5,524
Domestic manufacturing deduction	(2,772)	(3,981)	(4,280)
Research and development credits	(2,303)	(300)	(1,650)
Other-net	(1,600)	(419)	655
Income tax provision	$ 77,200	$ 87,390	$ 88,100

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Intangible Assets

12 Months Ended

Sep. 30, 2011

Intangible Assets [Abstract]

Intangible Assets

9. INTANGIBLE ASSETS

Intangibles assets subject to amortization consist of the following at September 30 (in thousands):

	2011						2010
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Technology	$	546,726	$	75,426	$	471,300	$	257,913	$	52,781	$	205,132
Order backlog		24,799		17,895		6,904		23,613		21,883		1,730
License agreement		9,373		4,336		5,037		9,373		3,804		5,569
Other		1,600		1,417		183		1,600		1,193		407
Total	$	582,498	$	99,074	$	483,424	$	292,499	$	79,661	$	212,838

Information regarding the amortization expense of amortizable intangible assets is detailed below (in thousands):

Aggregate Amortization Expense:

Years ended September 30,
2011	$	40,368
2010		15,079
2009		13,928

Estimated Amortization Expense:

Years ending September 30,
2012	$	34,458
2013		27,561
2014		27,561
2015		27,561
2016		27,561

Intangible assets acquired during the year ended September 30, 2011 were as follows (in thousands):

	Cost		Amortization Period
Intangible assets not subject to amortization:
Goodwill	$	1,129,145		None
Trademarks and trade names		174,600		None
Intangible assets subject to amortization:
Technology		314,900		20 years
Order backlog		24,754		1 year
		339,654		18.6 years
Total	$	1,643,399

The changes in the carrying amount of goodwill for the fiscal years ended September 30, 2010 and 2011 were as follows (in thousands):

Balance at September 30, 2009	$	1,462,310
Goodwill acquired during the year (Note 2)		107,065
Other		2,289
Balance at September 30, 2010		1,571,664
Goodwill acquired during the year (Note 2)		1,129,145
Divestitures (Note 21)		(103,880	)
Other		(1,182	)
Balance at September 30, 2011	$	2,595,747

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Discontinued Operations (Summarized Operating Results For The Discontinued Fastener And AQS Business) (Details) (USD $) In Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2011		Jul. 02, 2011		Apr. 02, 2011		Jan. 01, 2011		Sep. 30, 2011
Discontinued Operations [Abstract]
Net sales									$ 24,058
Loss from discontinued operations before income taxes									(2,917)
Income tax benefit									794
Loss from discontinued operations									(2,123)
Net gain on sales of discontinued operations, net of tax									22,032
Net income from discontinued operations	$ 3,082	[1]	$ (2,088)	[1]	$ 19,120	[1]	$ (205)	[1]	$ 19,909

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

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Derivatives And Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		12 Months Ended
	Sep. 30, 2011 New Senior Secured Credit Facility [Member]	Jun. 27, 2011 New Senior Secured Credit Facility [Member]	Sep. 30, 2011 Existing Senior Secured Credit Facility [Member]	Sep. 30, 2010 Existing Senior Secured Credit Facility [Member]
Derivative [Line Items]
Interest rate swap, notional amount	$ 353	$ 353		$ 300
Fixed rate of interest under interest rate swap	5.17%	5.17%		5.04%
Interest rate swap agreement description	2.17% plus the 3% margin percentage		3.04% plus the 2% margin percentage
Interest rate swap agreement termination date				Dec. 01, 2010

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Acquisitions (Tables)

12 Months Ended

Sep. 30, 2011

Acquisitions [Abstract]

Preliminary Purchase Price Allocation Of Fair Value Of The Assets And Liabilities Assumed

Assets acquired:
Current assets, excluding cash acquired	$	109,305
Property, plant and equipment		48,997
Intangible assets		433,000
Goodwill		864,004
Total assets acquired	$	1,455,306
Liabilities assumed:
Current liabilities	$	42,186
Deferred tax liabilities		115,591
Other noncurrent liabilities		31,837
Total liabilities assumed	$	189,614
Net assets acquired	$	1,265,692

Unaudited Pro Forma Consolidated Results

	Fiscal Years Ended September 30,
	2011		2010
Net sales	$	1,247,386	$	1,033,059
Net income applicable to common stock from continuing operations	$	217,575	$	44,614
Net earnings per share from continuing operations:
Basic and diluted	$	4.08	$	0.84

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Inventories

12 Months Ended

Sep. 30, 2011

Inventories [Abstract]

Inventories

7. INVENTORIES

Inventories consist of the following at September 30 (in thousands):

	2011			2010
Raw materials and purchased component parts	$	160,402		$	112,249
Work-in-progress		85,612			61,487
Finished Goods		43,192			31,251
Total		289,206			204,987
Reserves for excess and obsolete inventory and LIFO		(23,889	)		(16,231	)
Inventories—net	$	265,317		$	188,756

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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Summary Of Significant Accounting Policies [Line Items]
Research and development expense	$ 19.3	$ 13.9	$ 12.6
Percentage of inventory valued under LIFO method	5.00%
Order Backlog [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible asset useful life, maximum (years)	1
Technology Intangible Asset [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible asset useful life, maximum (years)	22
Technology Intangible Asset [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible asset useful life, minimum (years)	20
License Agreement [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible asset useful life, maximum (years)	20
Land Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (years)	10
Estimated useful life, maximum (years)	20
Building Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (years)	5
Estimated useful life, maximum (years)	30
Machinery And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (years)	2
Estimated useful life, maximum (years)	10
Furniture And Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, minimum (years)	3
Estimated useful life, maximum (years)	10

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Consolidated Statements Of Cash Flows (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
OPERATING ACTIVITIES:
Net income	$ 172,134	$ 163,445	$ 162,902
Net income from discontinued operations	(19,909)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	20,092	15,086	13,593
Amortization of intangible assets	40,368	15,079	13,928
Amortization of debt issue costs	9,842	7,578	3,251
Refinancing costs	72,454
Non-cash equity compensation	12,574	6,704	5,813
Excess tax benefits related to share-based payment arrangements	(23,411)	(17,459)	(9,278)
Deferred income taxes	8,888	1,900	8,800
Changes in assets/liabilities, net of effects from acquisitions of businesses:
Trade accounts receivable	(15,150)	(17,721)	(346)
Inventories	(9,841)	2,893	(4,518)
Income taxes receivable/payable	(22,264)	13,094	3,933
Other assets	(2,700)	513	(2,335)
Accounts payable	4,383	4,933	8,808
Accrued and other liabilities	13,118	1,259	(7,439)
Net cash provided by operating activities	260,578	197,304	197,112
INVESTING ACTIVITIES:
Capital expenditures	(18,026)	(12,887)	(13,155)
Acquisition of businesses, net of cash acquired	(1,650,363)	(166,557)	(155,233)
Cash proceeds from sales of discontinued operations	271,361
Cash proceeds from sale of real estate		2,885
Net cash used in investing activities	(1,397,028)	(176,559)	(168,388)
FINANCING ACTIVITIES:
Excess tax benefits related to share-based payment arrangements	23,411	17,459	9,278
Proceeds from exercise of stock options	9,208	6,361	8,345
Dividends paid	(2,811)	(404,868)
Treasury stock purchased			(15,242)
Proceeds from new senior secured credit facility - net	1,500,048
Repayment on new senior secured credit facility	(11,625)
Proceeds from senior subordinated notes due 2018-net	1,582,184
Proceeds from senior subordinated notes due 2014-net		404,248
Repurchase of senior subordinated notes due 2014	(1,041,894)
Repayment of existing senior secured credit facility	(780,000)
Net cash provided by financing activities	1,278,521	23,200	2,381
NET INCREASE IN CASH AND CASH EQUIVALENTS	142,071	43,945	31,105
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	234,112	190,167	159,062
CASH AND CASH EQUIVALENTS, END OF PERIOD	376,183	234,112	190,167
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	155,849	97,713	82,247
Cash paid during the period for income taxes	$ 88,367	$ 72,498	$ 75,306

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Leases (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Leases [Abstract]
Expiry date of manufacturing facility leases	December 2020
Annual rental expense	$ 5.9	$ 4.2	$ 3.3
Future minimum rental commitments in fiscal 2012	4.7
Future minimum rental commitments in fiscal 2013	3.3
Future minimum rental commitments in fiscal 2014	2.6
Future minimum rental commitments in fiscal 2015	1.8
Future minimum rental commitments in fiscal 2016	1.4
Future minimum rental commitments, due thereafter	$ 5.9

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Summary Of Significant Accounting Policies

12 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Consolidation—The accompanying consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States ("GAAP") and include the accounts of TD Group and subsidiaries. All significant intercompany balances and transactions have been eliminated.

Revenue Recognition and Related Allowances—Revenue is recognized from the sale of products when title and risk of loss passes to the customer, which is generally at the time of shipment. Substantially all sales are made pursuant to firm, fixed-price purchase orders received from customers. Provisions for estimated returns, uncollectible accounts and the cost of repairs under contract warranty provisions are provided for in the same period as the related revenues are recorded and are principally based on historical results modified, as appropriate, by the most current information available. Due to uncertainties in the estimation process, it is possible that actual results may vary from the estimates.

Shipping and Handling Costs—All shipping and handling costs are included in cost of sales in the Consolidated Statements of Income.

Research and Development Costs—The Company expenses research and development costs as incurred and classifies such amounts in selling and administrative expenses. The expense recognized for research and development costs for the years ended September 30, 2011, 2010 and 2009 was approximately $19.3 million, $13.9 million, and $12.6 million, respectively.

Cash Equivalents —The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.

Allowance for Uncollectible Accounts—The Company reserves for amounts determined to be uncollectible based on specific identification of losses and estimated losses based on historical experience. The allowance also incorporates a provision for the estimated impact of disputes with customers. The determination of the amount of the allowance for doubtful accounts is subject to significant levels of judgment and estimation by management. If circumstances change or economic conditions deteriorate or improve, the allowance for doubtful accounts could increase or decrease.

Inventories—Inventories are stated at the lower of cost or market. Cost of inventories is determined by the average cost and the first-in, first-out (FIFO) methods for all locations except CEF Industries, Inc. which determines the cost of inventories using the last-in, first-out (LIFO) method. Approximately 5% of the inventory was valued under the LIFO method at September 30, 2011. Provision for potentially obsolete or slow-moving inventory is made based on management's analysis of inventory levels and future sales forecasts. In accordance with industry practice, all inventories are classified as current assets even though a portion of the inventories may not be sold within one year.

Property, Plant and Equipment—Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method over the following estimated useful lives: land improvements from 10 to 20 years, buildings and improvements from 5 to 30 years, machinery and equipment from 2 to 10 years and furniture and fixtures from 3 to 10 years.

Property, plant and equipment is assessed for potential impairment whenever indicators of impairment are present by determining whether the carrying value of the property can be recovered through projected, undiscounted cash flows from future operations over the property's remaining estimated useful life. Any impairment recognized is the amount by which the carrying amount exceeds the fair value of the asset.

Debt Issue Costs, Premiums and Discounts—The cost of obtaining financing as well as premiums and discounts are amortized using the effective interest method over the terms of the respective obligations/securities.

Intangible Assets—Intangible assets consist of identifiable intangibles acquired or recognized in accounting for the acquisitions (trademarks, trade names, technology, order backlog and a license agreement) and goodwill. Goodwill and intangible assets that have indefinite useful lives (trademarks and trade names) are subject to annual impairment testing. Management determines fair value using a discounted future cash flow analysis or other accepted valuation techniques.

A two-step impairment test is used to identify potential goodwill impairment. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit (as defined) with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, goodwill is not considered impaired, and the second step of the goodwill impairment test is unnecessary. The second step measures the amount of impairment, if any, by comparing the carrying value of the goodwill associated with a reporting unit to the implied fair value of the goodwill derived from the estimated overall fair value of the reporting unit and the individual fair values of the other assets and liabilities of the reporting unit.

GAAP requires that the annual, and any interim, impairment assessment be performed at the reporting unit level. The reporting unit level is the operating subsidiary level for the Company. Substantially all goodwill was determined and recognized for each operating subsidiary pursuant to the accounting for the merger or acquisition as of the date of each transaction, and therefore the allocation of goodwill among reporting units was immaterial for purposes of the impairment assessment. With respect to acquisitions integrated into an existing operating subsidiary, any related goodwill is combined with goodwill of the operating subsidiary.

The impairment test for indefinite lived intangible assets consists of a comparison between their fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their fair values, an impairment loss will be recognized in an amount equal to the sum of any such excesses.

The Company assesses the recoverability of its amortizable intangible assets only when indicators of impairment are present by determining whether the amortization over their remaining lives can be recovered through projected, undiscounted cash flows from future operations. Amortization of amortizable intangible assets is computed using the straight-line method over the following estimated useful lives: technology from 20 to 22 years, order backlog over one year, and a license agreement over 20 years.

Prior to fiscal 2010, the annual impairment test of goodwill and indefinite-lived intangible assets was performed as of the last day of our fourth quarter. During fiscal 2010, the measurement date was changed to the first day of the fourth fiscal quarter. As a result of our growth and increase in the number of reporting units, we believe the change in our measurement date is preferable in order to provide additional time to quantify the fair value of our reporting units and to evaluate the results of the impairment testing. 

Stock Option Plans—The Company records stock-based compensation measured using the fair value method of accounting. Compensation expense is recorded over the vesting periods of the options.

Income Taxes—The Company accounts for income taxes using an asset and liability approach. Deferred taxes are recorded for the difference between the book and tax basis of various assets and liabilities. A valuation allowance is provided when it is more likely than not that some or all of a deferred tax asset will not be realized.

Contingencies—During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings. While the Company is currently involved in certain legal proceedings, it believes the results of these proceedings will not have a material adverse effect on its financial condition, results of operations, or cash flows. The Company believes that its potential exposure to such legal actions is adequately covered by its aviation product and general liability insurance.

Estimates—The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Comprehensive Income (Loss)—The term "comprehensive income (loss)" represents the change in stockholders' equity from transactions and other events and circumstances resulting from non-stockholder sources. The Company's accumulated other comprehensive income or loss, consisting principally of fair value adjustments to its interest rate swaps (net of tax), cumulative foreign currency translation adjustments and pension liability adjustments (net of tax), is reported separately in the accompanying consolidated statements of changes in stockholders' equity. See Note 20 to the Consolidated Financial Statements.

Segment Reporting—Management evaluates the Company as one reporting segment in the aerospace industry. The Company is engaged in the design, manufacture and sale of highly engineered aircraft components used in aerospace and defense applications through its wholly-owned subsidiaries. Substantially all of the Company's operations are located within the United States.

Earnings per Share—Earnings per share information is determined using the two-class method, which includes the weighted-average number of common shares outstanding during the period and other securities that participate in dividends ("participating securities"). Our vested stock options are considered "participating securities" because they include non-forfeitable rights to dividends. In applying the two-class method, earnings are allocated to both common stock shares and participating securities based on their respective weighted-average shares outstanding for the period. Diluted earnings per share information may include the additional effect of other securities, if dilutive, in which case the dilutive effect of such securities is calculated using the treasury stock method.

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Income Taxes (Tables)

12 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Schedule Of Components Of Income Tax Provision

	Fiscal Years Ended September 30,
	2011		2010		2009
Current
Federal	$	50,105	$	78,591	$	71,700
State		7,109		6,899		7,600
Foreign		1,310		—		—
		58,524		85,490		79,300
Deferred		18,676		1,900		8,800
	$	77,200	$	87,390	$	88,100

Schedule Of Effective Income Tax Rate Reconciliation

	Fiscal Years Ended September 30,
	2011			2010			2009
Tax at statutory rate of 35%	$	80,299		$	87,792		$	87,851
State and local income taxes, net of federal benefit		3,576			4,298			5,524
Domestic manufacturing deduction		(2,772	)		(3,981	)		(4,280	)
Research and development credits		(2,303	)		(300	)		(1,650	)
Other—net		(1,600	)		(419	)		655
Income tax provision	$	77,200		$	87,390		$	88,100

Schedule Of Deferred Tax Assets And Liabilities

	2011			2010
Deferred tax assets:
Net operating losses	$	16,500		$	6,125
Employee benefits, compensation and other accrued obligations		16,059			11,186
Inventory		10,715			4,960
Environmental		7,412			—
Product warranties		3,534			3,121
Interest rate swaps		2,087			1,440
Other accrued liabilities		4,692			3,688
Total		60,999			30,520
Less: Valuation allowance		(15,874	)		(6,097	)
Total deferred tax assets		45,125			24,423
Deferred tax liabilities:
Intangible assets		302,273			163,122
Property, plant and equipment		22,459			13,563
Other		—			1,126
Total deferred tax liabilities		324,732			177,811
Total net deferred tax liabilities	$	279,607		$	153,388

Reconciliation Of Unrecognized Tax Benefits

	2011			2010
Balance at beginning of period	$	1,832		$	3,253
Additions based on tax positions related to the current year		129			40
Reductions for tax positions of prior years		(760	)		(1,461	)
Acquisitions		6,367			—
Balance at end of period	$	7,568		$	1,832

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Summary Of Significant Accounting Policies (Policies)

12 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Basis Of Presentation And Consolidation

Basis of Presentation and Consolidation—The accompanying consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States ("GAAP") and include the accounts of TD Group and subsidiaries. All significant intercompany balances and transactions have been eliminated.

Revenue Recognition And Related Allowances

Revenue Recognition and Related Allowances—Revenue is recognized from the sale of products when title and risk of loss passes to the customer, which is generally at the time of shipment. Substantially all sales are made pursuant to firm, fixed-price purchase orders received from customers. Provisions for estimated returns, uncollectible accounts and the cost of repairs under contract warranty provisions are provided for in the same period as the related revenues are recorded and are principally based on historical results modified, as appropriate, by the most current information available. Due to uncertainties in the estimation process, it is possible that actual results may vary from the estimates.

Shipping And Handling Costs

Shipping and Handling Costs—All shipping and handling costs are included in cost of sales in the Consolidated Statements of Income.

Research And Development Costs

Research and Development Costs—The Company expenses research and development costs as incurred and classifies such amounts in selling and administrative expenses. The expense recognized for research and development costs for the years ended September 30, 2011, 2010 and 2009 was approximately $19.3 million, $13.9 million, and $12.6 million, respectively.

Cash Equivalents

Cash Equivalents —The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.

Allowance For Uncollectible Accounts

Allowance for Uncollectible Accounts—The Company reserves for amounts determined to be uncollectible based on specific identification of losses and estimated losses based on historical experience. The allowance also incorporates a provision for the estimated impact of disputes with customers. The determination of the amount of the allowance for doubtful accounts is subject to significant levels of judgment and estimation by management. If circumstances change or economic conditions deteriorate or improve, the allowance for doubtful accounts could increase or decrease.

Inventories

Inventories—Inventories are stated at the lower of cost or market. Cost of inventories is determined by the average cost and the first-in, first-out (FIFO) methods for all locations except CEF Industries, Inc. which determines the cost of inventories using the last-in, first-out (LIFO) method. Approximately 5% of the inventory was valued under the LIFO method at September 30, 2011. Provision for potentially obsolete or slow-moving inventory is made based on management's analysis of inventory levels and future sales forecasts. In accordance with industry practice, all inventories are classified as current assets even though a portion of the inventories may not be sold within one year.

Property, Plant And Equipment

Property, Plant and Equipment—Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method over the following estimated useful lives: land improvements from 10 to 20 years, buildings and improvements from 5 to 30 years, machinery and equipment from 2 to 10 years and furniture and fixtures from 3 to 10 years.

Property, plant and equipment is assessed for potential impairment whenever indicators of impairment are present by determining whether the carrying value of the property can be recovered through projected, undiscounted cash flows from future operations over the property's remaining estimated useful life. Any impairment recognized is the amount by which the carrying amount exceeds the fair value of the asset.

Debt Issue Costs, Premiums And Discounts

Debt Issue Costs, Premiums and Discounts—The cost of obtaining financing as well as premiums and discounts are amortized using the effective interest method over the terms of the respective obligations/securities.

Intangible Assets

Intangible Assets—Intangible assets consist of identifiable intangibles acquired or recognized in accounting for the acquisitions (trademarks, trade names, technology, order backlog and a license agreement) and goodwill. Goodwill and intangible assets that have indefinite useful lives (trademarks and trade names) are subject to annual impairment testing. Management determines fair value using a discounted future cash flow analysis or other accepted valuation techniques.

A two-step impairment test is used to identify potential goodwill impairment. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit (as defined) with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying amount, goodwill is not considered impaired, and the second step of the goodwill impairment test is unnecessary. The second step measures the amount of impairment, if any, by comparing the carrying value of the goodwill associated with a reporting unit to the implied fair value of the goodwill derived from the estimated overall fair value of the reporting unit and the individual fair values of the other assets and liabilities of the reporting unit.

GAAP requires that the annual, and any interim, impairment assessment be performed at the reporting unit level. The reporting unit level is the operating subsidiary level for the Company. Substantially all goodwill was determined and recognized for each operating subsidiary pursuant to the accounting for the merger or acquisition as of the date of each transaction, and therefore the allocation of goodwill among reporting units was immaterial for purposes of the impairment assessment. With respect to acquisitions integrated into an existing operating subsidiary, any related goodwill is combined with goodwill of the operating subsidiary.

The impairment test for indefinite lived intangible assets consists of a comparison between their fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their fair values, an impairment loss will be recognized in an amount equal to the sum of any such excesses.

The Company assesses the recoverability of its amortizable intangible assets only when indicators of impairment are present by determining whether the amortization over their remaining lives can be recovered through projected, undiscounted cash flows from future operations. Amortization of amortizable intangible assets is computed using the straight-line method over the following estimated useful lives: technology from 20 to 22 years, order backlog over one year, and a license agreement over 20 years.

Prior to fiscal 2010, the annual impairment test of goodwill and indefinite-lived intangible assets was performed as of the last day of our fourth quarter. During fiscal 2010, the measurement date was changed to the first day of the fourth fiscal quarter. As a result of our growth and increase in the number of reporting units, we believe the change in our measurement date is preferable in order to provide additional time to quantify the fair value of our reporting units and to evaluate the results of the impairment testing. 

Stock Option Plans

Stock Option Plans—The Company records stock-based compensation measured using the fair value method of accounting. Compensation expense is recorded over the vesting periods of the options.

Income Taxes

Income Taxes—The Company accounts for income taxes using an asset and liability approach. Deferred taxes are recorded for the difference between the book and tax basis of various assets and liabilities. A valuation allowance is provided when it is more likely than not that some or all of a deferred tax asset will not be realized.

Contingencies

Contingencies—During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings. While the Company is currently involved in certain legal proceedings, it believes the results of these proceedings will not have a material adverse effect on its financial condition, results of operations, or cash flows. The Company believes that its potential exposure to such legal actions is adequately covered by its aviation product and general liability insurance.

Estimates

Estimates—The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Comprehensive Income (Loss)

Comprehensive Income (Loss)—The term "comprehensive income (loss)" represents the change in stockholders' equity from transactions and other events and circumstances resulting from non-stockholder sources. The Company's accumulated other comprehensive income or loss, consisting principally of fair value adjustments to its interest rate swaps (net of tax), cumulative foreign currency translation adjustments and pension liability adjustments (net of tax), is reported separately in the accompanying consolidated statements of changes in stockholders' equity. See Note 20 to the Consolidated Financial Statements.

Segment Reporting

Segment Reporting—Management evaluates the Company as one reporting segment in the aerospace industry. The Company is engaged in the design, manufacture and sale of highly engineered aircraft components used in aerospace and defense applications through its wholly-owned subsidiaries. Substantially all of the Company's operations are located within the United States.

Earnings Per Share

Earnings per Share—Earnings per share information is determined using the two-class method, which includes the weighted-average number of common shares outstanding during the period and other securities that participate in dividends ("participating securities"). Our vested stock options are considered "participating securities" because they include non-forfeitable rights to dividends. In applying the two-class method, earnings are allocated to both common stock shares and participating securities based on their respective weighted-average shares outstanding for the period. Diluted earnings per share information may include the additional effect of other securities, if dilutive, in which case the dilutive effect of such securities is calculated using the treasury stock method.

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Valuation And Qualifying Accounts (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2009
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 2,270		$ 2,448		$ 2,182
Charged to Costs and Expenses	570		(156)		636
Acquisitions	599		678		295
Deductions from Reserve	(566)	[1]	(700)	[1]	(665)	[1]
Balance at End of Period	2,873		2,270		2,448
Reserve for excess and obsolete inventory [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	18,251		17,018		15,862
Charged to Costs and Expenses	8,361		22		2,537
Acquisitions	415		1,882		634
Deductions from Reserve	(1,404)	[1]	(671)	[1]	(2,015)	[1]
Balance at End of Period	$ 25,623		$ 18,251		$ 17,018

[1] The amounts in this column represent charge-offs net of recoveries.

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Intangible Assets (Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 582,498	$ 292,499
Accumulated Amortization	99,074	79,661
Net	483,424	212,838
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	546,726	257,913
Accumulated Amortization	75,426	52,781
Net	471,300	205,132
Order Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,799	23,613
Accumulated Amortization	17,895	21,883
Net	6,904	1,730
License Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,373	9,373
Accumulated Amortization	4,336	3,804
Net	5,037	5,569
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,600	1,600
Accumulated Amortization	1,417	1,193
Net	$ 183	$ 407

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Intangible Assets (Schedule Of Estimated Amortization Expense) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011
Intangible Assets [Abstract]
Estimated Amortization Expense 2012	$ 34,458
Estimated Amortization Expense 2013	27,561
Estimated Amortization Expense 2014	27,561
Estimated Amortization Expense 2015	27,561
Estimated Amortization Expense 2016	$ 27,561

XML

Acquisitions (Unaudited Pro Forma Consolidated Results) (Details) (USD $) In Thousands, except Share data	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Acquisitions [Abstract]
Net sales	$ 1,247,386	$ 1,033,059
Net income applicable to common stock from continuing operations	$ 217,575	$ 44,614
Net income (loss) per share basic and diluted	4.08	0.84

XML

Accrued Liabilities (Schedule Of Product Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Product Warranty Liability [Line Items]
Warranty period for products sold (less than, in years)	2
Liability balance at beginning of period	$ 8,345	$ 9,419	$ 6,255
Liability balance	2,217	880	3,921
Warranty costs incurred	(2,501)	(2,457)	(3,004)
Acquisitions	661	503	2,247
Liability balance at end of period	$ 8,722	$ 8,345	$ 9,419
Maximum [Member]
Product Warranty Liability [Line Items]
Maximum warranty period, years	6
Minimum [Member]
Product Warranty Liability [Line Items]
Minimum warranty period, days	90

XML

Recent Accounting Pronouncements

12 Months Ended

Sep. 30, 2011

Recent Accounting Pronouncements [Abstract]

Recent Accounting Pronouncements

4. RECENT ACCOUNTING PRONOUNCEMENTS

In May 2011, the Financial Accounting Standard Board ("FASB") issued authoritative accounting guidance included in Accounting Standards Codification (ASC) Topic 820, "Fair Value Measurement." This guidance amends the requirements for measuring fair value and disclosing information about fair value measurements and is effective for the Company during the first quarter of fiscal 2012. Upon adoption, the Company does not expect this standard to have a material impact on its financial condition or results of operations.

In June 2011, the FASB issued authoritative accounting guidance included in ASC Topic 220, "Comprehensive Income." This guidance eliminates the option to report other comprehensive income and its components in the statement of changes in equity. Companies can elect to present items of net income and other comprehensive income in one continuous statement or in two separate, but consecutive, statements. The Company is currently evaluating which method it will utilize to present items of net income and other comprehensive income. This presentation guidance is effective for the Company on October 1, 2012.

In September 2011, the FASB issued authoritative accounting guidance included in ASC Topic 350, "Intangibles—Goodwill and Other". This guidance amends the requirements for goodwill impairment testing. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing the two-step impairment test is unnecessary. This guidance is effective for the Company for its annual goodwill impairment testing for the year ending September 30, 2013.

XML

Environmental Liabilities (Details) (USD $) In Thousands	Sep. 30, 2011
Environmental Liabilities [Abstract]
Accrued liabilities	$ 1,000
Other non-current liabilities	18,888
Total	$ 19,888

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Stock-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2011

Stock-Based Compensation [Line Items]

Stock-Based Compensation Expense

	Fiscal Years Ended September 30,
	2011		2010		2009
Stock option compensation expense:
Performance vested stock options	$	12,568	$	6,693	$	5,695
Time vested stock options		—		—		87
Restricted stock award amortization		6		11		31
	$	12,574	$	6,704	$	5,813

Weighted Average Assumptions For All Options Granted

	Fiscal Years Ended September 30,
	2011	2010	2009
Risk-free interest rate	1.67% to 2.53%	2.45% to 2.96%	1.82% to 2.68%
Expected life of options	6 years	6 years	6 years
Expected dividend yield of stock	—	—	—
Expected volatility of stock	40%	40%	35%

Summary Of Activity For Restricted Stock Awards

	Number of Shares			Weighted-Average Grant Date Fair Value
Outstanding at September 30, 2010		264		$	37.97
Granted		—			—
Vested		(220	)		37.97
Forfeited		(44	)		37.97
Outstanding at September 30, 2011		—		$	—

2006 Stock Incentive Plan [Member] | Performance Vested Stock Options [Member]

Stock-Based Compensation [Line Items]

Summary Of Stock Option Activity

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,979,825		$	28.89
Granted		1,786,250			79.55
Exercised		(32,848	)		30.62
Forfeited		(97,142	)		57.18
Outstanding at September 30, 2011		4,636,085		$	47.80		8.0 years	$	157,024,199
Expected to vest		1,769,386		$	42.39		7.8 years	$	69,500,110
Exercisable at September 30, 2011		1,327,095		$	30.98		8.0 years	$	67,270,446

2003 Stock Option Plan [Member] | Performance Vested Stock Options [Member]

Stock-Based Compensation [Line Items]

Summary Of Stock Option Activity

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,166,628		$	11.43
Granted		—			—
Exercised		(645,443	)		10.40
Forfeited		—			—
Outstanding at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713
Exercisable at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713

2003 Stock Option Plan [Member] | Time Vested Stock Options [Member]

Stock-Based Compensation [Line Items]

Summary Of Stock Option Activity

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		703,129		$	10.11
Granted		—			—
Exercised		(128,104	)		9.11
Forfeited		—			—
Outstanding at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284
Exercisable at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284

2003 Stock Option Plan [Member] | Rollover Option Awards [Member]

Stock-Based Compensation [Line Items]

Summary Of Stock Option Activity

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		117,436		$	4.00
Granted		—			—
Exercised		(33,000	)		5.35
Forfeited		—			—
Outstanding at September 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895
Exercisable at Septmeber 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895

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Quarterly Financial Data (Unaudited)

12 Months Ended

Sep. 30, 2011

Quarterly Financial Data (Unaudited) [Abstract]

Quarterly Financial Data (Unaudited)

22. QUARTERLY FINANCIAL DATA (UNAUDITED)

	First Quarter Ended January 1, 2011			Second Quarter Ended April 2, 2011		Third Quarter Ended July 2, 2011			Fourth Quarter Ended September 30, 2011
	(in thousands, except per share amounts)
Year Ended September 30, 2011(1):
Net sales	$	233,552		$	304,307	$	325,209		$	342,953
Gross profit		127,146			157,874		183,149			193,016
Net income (loss) from continuing operations	$	(7,153	)	$	36,697	$	58,368		$	64,313
Net income (loss) from discontinued operations		(205	)		19,120		(2,088	)		3,082
Net income (loss)	$	(7,358	)	$	55,817	$	56,280		$	67,395
Net earnings (loss) per share from continuing operations—basic and diluted	$	(0.19	)	$	0.69	$	1.10		$	1.20
Net earnings (loss) per share from discontinued operations—basic and diluted		—			0.35		(0.04	)		0.06
Net earnings (loss) per share—basic and diluted	$	(0.19	)	$	1.04	$	1.06		$	1.26

(1) Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

	First Quarter Ended January 2, 2010		Second Quarter Ended April 3, 2010		Third Quarter Ended July 3, 2010		Fourth Quarter Ended September 30, 2010
	(in thousands, except per share amounts)
Year Ended September 30, 2010
Net sales	$	184,278	$	206,077	$	214,182	$	223,117
Gross profit		103,059		115,203		122,433		132,371
Net income		30,758		38,045		44,005		50,635
Net earnings per share—basic and diluted	$	0.01	$	0.72	$	0.83	$	0.96

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Debt (Senior Subordinated Notes) (Narrative) (USD $)	12 Months Ended						12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010 7 3/4% Senior Subordinated Notes, Due 2018 [Member]	Sep. 30, 2011 7 3/4% Senior Subordinated Notes, Due 2018 [Member]	Dec. 31, 2010 7 3/4% Senior Subordinated Notes, Due 2018 [Member]	Sep. 30, 2011 7 3/4% Senior Subordinated Notes, Due 2014 [Member]
Senior Subordinated Notes [Line Items]
Debt instrument, face amount	$ 3,138,375,000					$ 1,600,000,000
Debt instrument, maturity date					2018		2014
Percentage of principal amount of debt on issue price				100.00%
Debt instrument, redemption rate	103.875%
Debt instrument redemption rate in addition to accrued and unpaid interest	100.00%
Redemption rate of debt instrument in addition to accrued and unpaid interest out of proceed from equity offering	107.75%
Redemption rate of debt instrument demanded by holder under change in business control	101.00%
Refinancing costs	72,454,000
Premium paid to redeem notes							41,900,000
Write-off of debt issue costs and unamortized premium and discount							25,700,000
Settlement of interest rate swap agreement and other expenses							$ 4,900,000

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Discontinued Operations (Narrative) (Details) (USD $)	12 Months Ended	1 Months Ended	0 Months Ended	3 Months Ended
	Sep. 30, 2011	Mar. 09, 2011 Fastener Business [Member]	Apr. 07, 2011 Aero Quality Sales [Member]	Jul. 02, 2011 Aero Quality Sales [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business	$ 271,361,000	$ 239,600,000	$ 31,800,000
Gain (loss) on sales of discontinued operations, net of tax	22,032,000	23,600,000	(1,600,000)
Gain (loss) on sale of discontinued operations, tax		56,500,000	6,200,000
Working capital adjustment				$ 1,800,000

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Stock-Based Compensation (Narrative) (Details) (USD $)	1 Months Ended		12 Months Ended								12 Months Ended			12 Months Ended
	Oct. 31, 2009	Jul. 31, 2008	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2011 Employee Service [Member] 2003 Stock Option Plan [Member]	Sep. 30, 2011 Other Than Employee Service [Member] 2003 Stock Option Plan [Member]	Sep. 30, 2011 Time, Performance And Rollover Vested Stock Options [Member]	Sep. 30, 2010 Time, Performance And Rollover Vested Stock Options [Member]	Sep. 30, 2009 Time, Performance And Rollover Vested Stock Options [Member]	Sep. 30, 2011 2003 Stock Option Plan And 2006 Stock Incentive Plan [Member]	Sep. 30, 2011 2003 Stock Option Plan [Member]	Sep. 30, 2011 2003 Stock Option Plan [Member] TransDigm Group [Member]	Sep. 30, 2011 2006 Stock Incentive Plan [Member]	Feb. 24, 2011 2006 Stock Incentive Plan [Member]	Jul. 01, 2008 2006 Stock Incentive Plan [Member]	Sep. 30, 2011 2006 Stock Incentive Plan [Member] TransDigm Group [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Fair value of options granted			$ 33.51	$ 18.83	$ 10.45									$ 84.30
Unrecognized compensation cost related to non-vested awards expected to vest			$ 17,000,000
Non-vested awards expected to vest weighted-average period			3
Fair value of shares vested			7,800,000	4,600,000	4,900,000
Issuance of common stock												5,469,301				8,119,668
Restricted stock grant period in years		three
Threshold Price Minimum For Accelerated Vesting															$ 160
Shares available for award												3,870,152
Options issued Outstanding											134,040
Stock split terms												TD Group (after giving effect to the 149.60 for 1.00 stock split effected on March 14, 2006).
Percentage of vesting						20.00%	80.00%
Graded vesting years, maximum												four
Options expire years												ten
Shares available for grant													9,339,453				3,400,151
Total intrinsic value								$ 63,000,000	$ 19,000,000	$ 26,400,000
Stock option issued											2
Options issued											48,096		9,261,624	1,420
Exercise Price											$ 6.68
Comparable dividend equivalents	$ 7.65
Outstanding options received with dividend equivalents	33,100,000

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Intangible Assets (Summary Of Changes In The Carrying Value Of Goodwill) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Intangible Assets [Abstract]
Beginning balance	$ 1,571,664	$ 1,462,310
Goodwill acquired during the year (Note 2)	1,129,145	107,065
Divestitures (Note 21)	(103,880)
Other	(1,182)	2,289
Ending Balance	$ 2,595,747	$ 1,571,664

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Earnings Per Share (Two-Class Method) (Tables)

12 Months Ended

Sep. 30, 2011

Earnings Per Share (Two-Class Method) [Abstract]

Computation Of Basic And Diluted Earnings Per Share

	Fiscal Years Ended September 30,
	2011			2010			2009
Numerator for earnings per share:
Net income from continuing operations	$	152,225		$	163,445		$	162,902
Less dividends paid on participating securities		(2,811	)		(30,313	)		—
		149,414			133,132			162,902
Net income from discontinued operations		19,909			—			—
Net income applicable to common stock—basic and diluted	$	169,323		$	133,132		$	162,902
Denominator for basic and diluted earnings per share under the two-class method:
Weighted average common shares outstanding		49,888			49,171			48,481
Vested options deemed participating securities		3,445			3,752			4,058
Total shares for basic and diluted earnings per share		53,333			52,923			52,539
Net earnings per share from continuing operations—basic and diluted	$	2.80		$	2.52		$	3.10
Net earnings per share from discontinued operations—basic and diluted		0.37			—			—
Net earnings per share	$	3.17		$	2.52		$	3.10

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Environmental Liabilities (Tables)

12 Months Ended

Sep. 30, 2011

Environmental Liabilities [Abstract]

Environmental Remediation Obligations

	September 30, 2011
Accrued liabilities	$	1,000
Other non-current liabilities		18,888
Total	$	19,888

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Valuation And Qualifying Accounts

12 Months Ended

Sep. 30, 2011

Valuation And Qualifying Accounts [Abstract]

Valuation And Qualifying Accounts

TRANSDIGM GROUP INCORPORATED

VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED SEPTEMBER 30, 2011, 2010, AND 2009

(Amounts in Thousands)

Column A	Column B		Column C					Column D			Column E
Description	Balance at Beginning of Period		Additions					Deductions from Reserve(1)			Balance at End of Period
			Charged to Costs and Expenses			Acquisitions
Year Ended September 30, 2011
Allowance for doubtful accounts	$	2,270	$	570		$	599	$	(566	)	$	2,873
Reserve for excess and obsolete inventory		18,251		8,361			415		(1,404	)		25,623
Year Ended September 30, 2010
Allowance for doubtful accounts		2,448		(156	)		678		(700	)		2,270
Reserve for excess and obsolete inventory		17,018		22			1,882		(671	)		18,251
Year Ended September 30, 2009
Allowance for doubtful accounts		2,182		636			295		(665	)		2,448
Reserve for excess and obsolete inventory		15,862		2,537			634		(2,015	)		17,018

(1) The amounts in this column represent charge-offs net of recoveries.

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Retirement Plans

12 Months Ended

Sep. 30, 2011

Retirement Plans [Abstract]

Retirement Plans

12. RETIREMENT PLANS

Defined Contribution Plans—The Company sponsors certain defined contribution employee savings plans that cover substantially all of the Company's non-union employees. Under certain plans, the Company contributes a percentage of employee compensation and matches a portion of employee contributions. The cost recognized for such contributions for the years ended September 30, 2011, 2010 and 2009 was approximately $3.5 million, $2.6 million and $2.4 million, respectively.

Defined Benefit Pension Plans—The Company has three non-contributory defined benefit pension plans. The Company's funding policy is to contribute actuarially determined amounts allowable under Internal Revenue Service regulations for the qualified plans. The Company uses a September 30th measurement date for its defined benefit pension plans.

The Company has two qualified, non-contributory defined benefit pension plans, which together cover certain union employees. The plans provide benefits of stated amounts for each year of service. The plan assets as of September 30, 2011 and 2010 were approximately $6.7 million. The Company's accumulated benefit obligation for its defined benefit pension plans at September 30, 2011 and 2010 was $9.7 million and $9.6 million, respectively. The total liability recognized at September 30, 2011 and 2010 was $3.0 million and $2.9 million, respectively. The net periodic pension cost recognized in the Consolidated Statements of Income was $0.4 million for the year ended September 30, 2011 and $0.3 million for the years ended September 30, 2010 and 2009.

The Company has a non-qualified, non-contributory defined benefit pension plan, which covers certain retired employees of a business acquired during the year ended September 30, 2011. The plan is unfunded and provides defined benefits based on the final average salary of the employees as defined in the plan. The projected benefit obligation for this defined benefit pension plan and the total liability recognized in the Consolidated Balance Sheet at September 30, 2011 was approximately $7.9 million.

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Inventories (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Inventories [Abstract]
Raw materials and purchased component parts	$ 160,402	$ 112,249
Work-in-progress	85,612	61,487
Finished goods	43,192	31,251
Total	289,206	204,987
Reserve for excess and obsolete inventory and LIFO	(23,889)	(16,231)
Inventories - net	$ 265,317	$ 188,756

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Stock-Based Compensation (Summary Of Activity For Restricted Stock Awards) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011
Stock-Based Compensation [Abstract]
Number of Shares, Outstanding, beginning of period	264
Number of Shares, Vested	(220)
Number of Shares, Forfeited	(44)
Weighted-Average Grant Date Fair Value, Outstanding, beginning of period	$ 37.97
Weighted-Average Grant Date Fair Value, Granted
Weighted-Average Grant Date Fair Value, Vested	$ 37.97
Weighted-Average Grant Date Fair Value, Forfeited	$ 37.97
Weighted-Average Grant Date Fair Value, Outstanding, End of period

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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Net operating losses	$ 16,500	$ 6,125
Employee benefits, compensation and other accrued obligations	16,059	11,186
Inventory	10,715	4,960
Environmental	7,412
Product warranties	3,534	3,121
Interest rate swap	2,087	1,440
Other accrued liabilities	4,692	3,688
Total	60,999	30,520
Less: Valuation allowance	(15,874)	(6,097)
Total deferred tax assets	45,125	24,423
Intangible assets	302,273	163,122
Property, plant and equipment	22,459	13,563
Other		1,126
Total deferred tax liabilities	324,732	177,811
Total net deferred tax liabilities	$ 279,607	$ 153,388

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Supplemental Guarantor Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	$ 376,183	$ 234,112	$ 190,167	$ 159,062
Trade accounts receivable - Net	189,293	134,461
Inventories	265,317	188,756
Deferred income taxes	30,844	15,200
Prepaid expenses and other	8,655	10,979
Total current assets	870,292	583,508
PROPERTY, PLANT AND EQUIPMENT - Net	150,800	99,613
GOODWILL	2,595,747	1,571,664	1,462,310
TRADEMARKS AND TRADE NAMES	344,942	187,556
OTHER INTANGIBLE ASSETS - Net	483,424	212,838
DEBT ISSUE COSTS - Net	59,007	18,649
OTHER	9,424	3,990
TOTAL ASSETS	4,513,636	2,677,818
Current portion of long-term debt	15,500
Accounts payable	62,110	44,226
Accrued liabilities	120,312	68,786
Income taxes payable	8,937
Total current liabilities	206,859	113,012
LONG-TERM DEBT	3,122,875	1,771,646
DEFERRED INCOME TAXES	310,451	168,588
OTHER NON-CURRENT LIABILITIES	62,502	31,593
Total liabilities	3,702,687	2,084,839
STOCKHOLDERS' EQUITY	810,949	592,979	819,162	653,900
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	4,513,636	2,677,818
TransDigm Group [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	5,695	4,884	15,388	1,552
Total current assets	5,695	4,884
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	805,254	588,095
TOTAL ASSETS	810,949	592,979
STOCKHOLDERS' EQUITY	810,949	592,979
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	810,949	592,979
TransDigm Inc. [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	360,074	226,200	173,630	160,680
Trade accounts receivable - Net	11,183	12,935
Inventories	23,311	19,694
Deferred income taxes	23,248	15,200
Prepaid expenses and other	2,571	7,837
Total current assets	420,387	281,866
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	3,746,531	2,293,001
PROPERTY, PLANT AND EQUIPMENT - Net	15,903	15,248
GOODWILL	81,736	68,593
TRADEMARKS AND TRADE NAMES	19,376	19,376
OTHER INTANGIBLE ASSETS - Net	8,760	9,387
DEBT ISSUE COSTS - Net	59,007	18,649
OTHER	2,415	2,350
TOTAL ASSETS	4,354,115	2,708,470
Current portion of long-term debt	15,500
Accounts payable	8,071	9,767
Accrued liabilities	52,525	32,639
Income taxes payable	5,561
Total current liabilities	81,657	42,406
LONG-TERM DEBT	3,122,875	1,771,646
DEFERRED INCOME TAXES	199,610	168,588
OTHER NON-CURRENT LIABILITIES	26,717	19,733
Total liabilities	3,430,859	2,002,373
STOCKHOLDERS' EQUITY	923,256	706,097
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	4,354,115	2,708,470
Subsidiary Guarantors [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	2,115	3,028	1,149	(3,170)
Trade accounts receivable - Net	170,420	122,174
Inventories	233,726	169,296
Deferred income taxes	7,596
Prepaid expenses and other	5,451	3,142
Total current assets	419,308	297,640
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	1,557,736	907,547
PROPERTY, PLANT AND EQUIPMENT - Net	129,566	84,365
GOODWILL	2,478,780	1,503,071
TRADEMARKS AND TRADE NAMES	313,280	168,180
OTHER INTANGIBLE ASSETS - Net	459,615	203,451
OTHER	7,010	1,640
TOTAL ASSETS	5,365,295	3,165,894
Accounts payable	49,944	35,107
Accrued liabilities	65,178	36,147
Income taxes payable	3,155
Total current liabilities	118,277	71,254
DEFERRED INCOME TAXES	110,841
OTHER NON-CURRENT LIABILITIES	35,785	11,860
Total liabilities	264,903	83,114
STOCKHOLDERS' EQUITY	5,100,392	3,082,780
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	5,365,295	3,165,894
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	8,299
Trade accounts receivable - Net	8,484
Inventories	8,264
Prepaid expenses and other	633
Total current assets	25,680
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(8,494)
PROPERTY, PLANT AND EQUIPMENT - Net	5,331
GOODWILL	35,231
TRADEMARKS AND TRADE NAMES	12,286
OTHER INTANGIBLE ASSETS - Net	15,049
OTHER	(1)
TOTAL ASSETS	85,082
Accounts payable	4,889
Accrued liabilities	2,609
Income taxes payable	221
Total current liabilities	7,719
Total liabilities	7,719
STOCKHOLDERS' EQUITY	77,363
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	85,082
Eliminations [Member]
Supplemental Guarantor Information [Line Items]
Trade accounts receivable - Net	(794)	(648)
Inventories	16	(234)
Total current assets	(778)	(882)
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(6,101,027)	(3,788,643)
TOTAL ASSETS	(6,101,805)	(3,789,525)
Accounts payable	(794)	(648)
Total current liabilities	(794)	(648)
Total liabilities	(794)	(648)
STOCKHOLDERS' EQUITY	(6,101,011)	(3,788,877)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	(6,101,805)	(3,789,525)
Total Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	376,183	234,112	190,167	159,062
Trade accounts receivable - Net	189,293	134,461
Inventories	265,317	188,756
Deferred income taxes	30,844	15,200
Prepaid expenses and other	8,655	10,979
Total current assets	870,292	583,508
PROPERTY, PLANT AND EQUIPMENT - Net	150,800	99,613
GOODWILL	2,595,747	1,571,664
TRADEMARKS AND TRADE NAMES	344,942	187,556
OTHER INTANGIBLE ASSETS - Net	483,424	212,838
DEBT ISSUE COSTS - Net	59,007	18,649
OTHER	9,424	3,990
TOTAL ASSETS	4,513,636	2,677,818
Current portion of long-term debt	15,500
Accounts payable	62,110	44,226
Accrued liabilities	120,312	68,786
Income taxes payable	8,937
Total current liabilities	206,859	113,012
LONG-TERM DEBT	3,122,875	1,771,646
DEFERRED INCOME TAXES	310,451	168,588
OTHER NON-CURRENT LIABILITIES	62,502	31,593
Total liabilities	3,702,687	2,084,839
STOCKHOLDERS' EQUITY	810,949	592,979
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 4,513,636	$ 2,677,818

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Intangible Assets (Intangible Assets Acquired) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011 years
Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 339,654
Amortization Period (in years)	18.6
Total - Intangible assets both subject to and not subject to amortization	1,643,399
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	174,600
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	314,900
Amortization Period (in years)	20
Order Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	24,754
Amortization Period (in years)	1
Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	$ 1,129,145

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Earnings Per Share (Two-Class Method)

12 Months Ended

Sep. 30, 2011

Earnings Per Share (Two-Class Method) [Abstract]

Earnings Per Share (Two-Class Method)

5. EARNINGS PER SHARE (TWO-CLASS METHOD)

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):

	Fiscal Years Ended September 30,
	2011			2010			2009
Numerator for earnings per share:
Net income from continuing operations	$	152,225		$	163,445		$	162,902
Less dividends paid on participating securities		(2,811	)		(30,313	)		—
		149,414			133,132			162,902
Net income from discontinued operations		19,909			—			—
Net income applicable to common stock—basic and diluted	$	169,323		$	133,132		$	162,902
Denominator for basic and diluted earnings per share under the two-class method:
Weighted average common shares outstanding		49,888			49,171			48,481
Vested options deemed participating securities		3,445			3,752			4,058
Total shares for basic and diluted earnings per share		53,333			52,923			52,539
Net earnings per share from continuing operations—basic and diluted	$	2.80		$	2.52		$	3.10
Net earnings per share from discontinued operations—basic and diluted		0.37			—			—
Net earnings per share	$	3.17		$	2.52		$	3.10

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Accumulated Other Comprehensive Income (Loss) [Abstract]
Interest rate swap	$ 2,087,000	$ 1,440,000
Unamortized pension benefits, tax	1,000,000	1,000,000
Interest rate swap agreements, net of taxes of $2.1 million for 2011 and $1.4 million for 2010	(3,500,000)	(2,423,000)
Cumulative foreign currency translation adjustments	1,795,000	297,000
Pension liability adjustments, net of taxes of $1.0 million for 2011 and $1.0 million for 2010	(1,572,000)	(1,674,000)
Total	$ (3,277,000)	$ (3,800,000)

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Capital Stock

12 Months Ended

Sep. 30, 2011

Capital Stock [Abstract]

Capital Stock

15. CAPITAL STOCK

Capital Stock—Authorized capital stock of TD Group consists of 224,400,000 shares of $.01 par value common stock and 149,600,000 shares of $.01 par value preferred stock. The total number of shares of common stock outstanding at September 30, 2011 and 2010 was 50,829,276 and 49,928,241, respectively. There were no shares of preferred stock outstanding at September 30, 2011 and 2010. The terms of the preferred stock have not been established.

On August 22, 2011, the Board of Directors authorized a common share repurchase program, which was announced on August 23, 2011. Under the terms of the program, the Company may purchase up to a maximum aggregate value of $100 million of its shares of common stock. At September 30, 2011, no shares were repurchased under this program. The program replaces the repurchase program announced on October 23, 2008, under which the Company previously repurchased 494,100 shares of its common stock at a gross cost of approximately $15.2 million.

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Debt (Revolving Credit Facility And Term Loan) (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended		12 Months Ended			12 Months Ended
	Sep. 30, 2011 Existing Senior Secured Credit Facility [Member]	Dec. 31, 2010 Existing Senior Secured Credit Facility [Member]	Sep. 30, 2010 Existing Senior Secured Credit Facility [Member]	Mar. 25, 2011 New Senior Secured Credit Facility [Member]	Feb. 14, 2011 New Senior Secured Credit Facility [Member]	Sep. 30, 2011 New Senior Secured Credit Facility [Member]	Jun. 27, 2011 New Senior Secured Credit Facility [Member]	Sep. 30, 2011 7 3/4% Senior Subordinated Notes, Due 2018 [Member]	Sep. 30, 2011 TransDigm's Foreign Subsidiaries [Member]
Line of Credit Facility [Line Items]
Term loan facility amount		$ 1,550,000,000
Revolving credit facility amount		245,000,000			1,550,000,000
Debt instrument, maturity date								2018
Additional term loan under credit facility				500,000,000
Date the credit facility was fully drawn					February 14, 2011
Letters of credit outstanding	8,000,000
Borrowings available under credit facility	237,000,000
Maturity date of credit facility	December 2015					February 2017
Applicable interest rate on term loan						4.00%
Interest rate swap, notional amount			300,000,000			353,000,000	353,000,000
Quarterly principal payments						$ 3,900,000
Floor basis spread on LIBO						1.00%
Fixed rate of interest under interest rate swap			5.04%			5.17%	5.17%
Percentage of voting capital stock									65.00%
Term loan mandatory principal prepayment commencement period from fiscal year (days)						90
Percentage of principal amount of term loan to be prepaid						100.00%
Percentage of premium on prepayment or receipt of term loan						1.00%

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Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Accrued Liabilities [Abstract]
Compensation and related benefits	$ 24,824	$ 18,146
Interest	37,065	17,747
Product warranties	8,722	8,345
Other	49,701	24,548
Total	$ 120,312	$ 68,786

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Debt (Tables)

12 Months Ended

Sep. 30, 2011

Debt [Abstract]

Debt Outstanding

	2011		2010
Term loans	$	1,538,375	$	780,000
Senior Subordinated Notes due 2018		1,600,000		—
Senior Subordinated Notes due 2014		—		991,646
		3,138,375		1,771,646
Less current portion		15,500		—
Long-term debt	$	3,122,875	$	1,771,646

Future Maturities Of Long-Term Debt

Years ended September 30,
2012	$	15,500
2013		15,500
2014		15,500
2015		15,500
2016		15,500
Thereafter		3,060,875
	$	3,138,375

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Retirement Plans (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Retirement Plans [Abstract]
Number of non-contributory defined benefit pension plans	three
Non-contributory defined benefit pension plans, qualified	two
Defined benefit plan, assets	$ 6.7	$ 6.7
Defined benefit plan, accumulated benefit obligation	9.7	9.6
Defined benefit pension plan, liabilities	3.0	2.9
Net period pension, cost recognized	0.4	0.3	0.3
Defined contribution plan, cost recognized	3.5	2.6	2.4
Defined benefit pension plan liability recognized in consolidated balance sheet	$ 7.9

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Supplemental Guarantor Information

12 Months Ended

Sep. 30, 2011

Supplemental Guarantor Information [Abstract]

Supplemental Guarantor Information

23. SUPPLEMENTAL GUARANTOR INFORMATION

TransDigm's 7 ³/4% senior subordinated notes due 2018 (the "2018 Notes") (see Note 11) are jointly and severally guaranteed, on a senior subordinated basis, by TD Group and TransDigm Inc.'s domestic restricted subsidiaries, as defined in the Indenture. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of September 30, 2011 and September 30, 2010 and its statements of income and cash flows for the fiscal years ended September 30, 2011, 2010 and 2009 for (i) TransDigm Group on a parent only basis with its investment in subsidiaries recorded under the equity method, (ii) TransDigm Inc. including its directly owned operations and non-operating entities, (iii) the Subsidiary Guarantors on a combined basis, (iv) Non-Guarantor Subsidiaries after December 14, 2010 and (v) the Company on a consolidated basis.

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2011

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	5,695	$	360,074	$	2,115	$	8,299		$	—		$	376,183
Trade accounts receivable—Net		—		11,183		170,420		8,484			(794	)		189,293
Inventories		—		23,311		233,726		8,264			16			265,317
Deferred income taxes		—		23,248		7,596		—			—			30,844
Prepaid expenses and other		—		2,571		5,451		633			—			8,655
Total current assets		5,695		420,387		419,308		25,680			(778	)		870,292
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		805,254		3,746,531		1,557,736		(8,494	)		(6,101,027	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,903		129,566		5,331			—			150,800
GOODWILL		—		81,736		2,478,780		35,231			—			2,595,747
TRADEMARKS AND TRADE NAMES		—		19,376		313,280		12,286			—			344,942
OTHER INTANGIBLE ASSETS—Net		—		8,760		459,615		15,049			—			483,424
DEBT ISSUE COSTS—Net		—		59,007		—		—			—			59,007
OTHER		—		2,415		7,010		(1	)		—			9,424
TOTAL ASSETS	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—	$	15,500	$	—	$	—		$	—		$	15,500
Accounts payable		—		8,071		49,944		4,889			(794	)		62,110
Accrued liabilities		—		52,525		65,178		2,609			—			120,312
Income taxes payable		—		5,561		3,155		221			—			8,937
Total current liabilities		—		81,657		118,277		7,719			(794	)		206,859
LONG-TERM DEBT		—		3,122,875		—		—			—			3,122,875
DEFERRED INCOME TAXES		—		199,610		110,841		—			—			310,451
OTHER NON-CURRENT LIABILITIES		—		26,717		35,785		—			—			62,502
Total liabilities		—		3,430,859		264,903		7,719			(794	)		3,702,687
STOCKHOLDERS' EQUITY		810,949		923,256		5,100,392		77,363			(6,101,011	)		810,949
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	810,949	$	4,354,115	$	5,365,295	$	85,082		$	(6,101,805	)	$	4,513,636

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group		TransDigm Inc.		Subsidiary Guarantors		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	4,884	$	226,200	$	3,028	$	—		$	234,112
Trade accounts receivable—Net		—		12,935		122,174		(648	)		134,461
Inventories		—		19,694		169,296		(234	)		188,756
Deferred income taxes		—		15,200		—		—			15,200
Prepaid expenses and other		—		7,837		3,142		—			10,979
Total current assets		4,884		281,866		297,640		(882	)		583,508
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		588,095		2,293,001		907,547		(3,788,643	)		—
PROPERTY, PLANT AND EQUIPMENT—Net		—		15,248		84,365		—			99,613
GOODWILL		—		68,593		1,503,071		—			1,571,664
TRADEMARKS AND TRADE NAMES		—		19,376		168,180		—			187,556
OTHER INTANGIBLE ASSETS—Net		—		9,387		203,451		—			212,838
DEBT ISSUE COSTS—Net		—		18,649		—		—			18,649
OTHER		—		2,350		1,640		—			3,990
TOTAL ASSETS	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
Accounts payable	$	—	$	9,767	$	35,107	$	(648	)	$	44,226
Accrued liabilities		—		32,639		36,147		—			68,786
Total current liabilities		—		42,406		71,254		(648	)		113,012
LONG-TERM DEBT—Less current portion		—		1,771,646		—		—			1,771,646
DEFERRED INCOME TAXES		—		168,588		—		—			168,588
OTHER NON-CURRENT LIABILITIES		—		19,733		11,860		—			31,593
Total liabilities		—		2,002,373		83,114		(648	)		2,084,839
STOCKHOLDERS' EQUITY		592,979		706,097		3,082,780		(3,788,877	)		592,979
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	592,979	$	2,708,470	$	3,165,894	$	(3,789,525	)	$	2,677,818

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2011

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	81,944		$	1,097,662	$	31,649		$	(5,234	)	$	1,206,021
COST OF SALES		—			46,438			479,536		24,334			(5,472	)		544,836
GROSS PROFIT		—			35,506			618,126		7,315			238			661,185
SELLING AND ADMINISTRATIVE EXPENSES		—			44,754			85,796		3,172			(11	)		133,711
AMORTIZATION OF INTANGIBLE ASSETS		—			624			37,900		1,815			—			40,339
INCOME (LOSS) FROM OPERATIONS		—			(9,872	)		494,430		2,328			249			487,135
REFINANCING COSTS		—			72,454			—		—			—			72,454
INTEREST EXPENSE—Net		—			183,175			777		1,304			—			185,256
EQUITY IN INCOME OF SUBSIDIARIES		(172,134	)		(345,158	)		—		—			517,292			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		172,134			79,657			493,653		1,024			(517,043	)		229,425
INCOME TAX PROVISION (BENEFIT)		—			(92,477	)		167,822		1,855			—			77,200
INCOME (LOSS) FROM CONTINUING OPERATIONS		172,134			172,134			325,831		(831	)		(517,043	)		152,225
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX		—			—			4,883		15,026			—			19,909
NET INCOME	$	172,134		$	172,134		$	330,714	$	14,195		$	(517,043	)	$	172,134

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	64,990		$	766,068	$	(3,404	)	$	827,654
COST OF SALES		—			36,398			320,288		(2,098	)		354,588
GROSS PROFIT		—			28,592			445,780		(1,306	)		473,066
SELLING AND ADMINISTRATIVE EXPENSES		—			31,130			65,088		(1,300	)		94,918
AMORTIZATION OF INTANGIBLE ASSETS		—			624			14,455		—			15,079
INCOME (LOSS) FROM OPERATIONS		—			(3,162	)		366,237		(6	)		363,069
INTEREST EXPENSE—NET		—			110,127			2,107		—			112,234
EQUITY IN INCOME OF SUBSIDIARIES		(163,445	)		(237,334	)		—		400,779			—
INCOME BEFORE INCOME TAXES		163,445			124,045			364,130		(400,785	)		250,835
INCOME TAX PROVISION (BENEFIT)		—			(39,400	)		126,790		—			87,390
NET INCOME	$	163,445		$	163,445		$	237,340	$	(400,785	)	$	163,445

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME

FOR THE YEAR ENDED SEPTEMBER 30, 2009

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors		Eliminations			Total Consolidated
NET SALES	$	—		$	68,660		$	694,730	$	(1,838	)	$	761,552
COST OF SALES		—			38,647			295,077		(1,518	)		332,206
GROSS PROFIT		—			30,013			399,653		(320	)		429,346
SELLING AND ADMINISTRATIVE EXPENSES		—			27,010			53,308		(300	)		80,018
AMORTIZATION OF INTANGIBLE ASSETS		—			624			13,304		—			13,928
INCOME FROM OPERATIONS		—			2,379			333,041		(20	)		335,400
INTEREST EXPENSE—NET		—			79,880			4,518		—			84,398
EQUITY IN INCOME OF SUBSIDIARIES		(162,902	)		(213,190	)		—		376,092			—
INCOME BEFORE INCOME TAXES		162,902			135,689			328,523		(376,112	)		251,002
INCOME TAX PROVISION (BENEFIT)		—			(27,213	)		115,313		—			88,100
NET INCOME	$	162,902		$	162,902		$	213,210	$	(376,112	)	$	162,902

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2011

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$	—		$	(164,846	)	$	409,483		$	14,294		$	1,647		$	260,578
INVESTING ACTIVITIES:
Capital expenditures		—			(2,639	)		(15,140	)		(247	)		—			(18,026	)
Acquisition of businesses, net of cash acquired		—			(1,650,363	)		—			—			—			(1,650,363	)
Cash proceeds from sales of discontinued operations		—			271,361			—			—			—			271,361
Net cash used in investing activities		—			(1,381,641	)		(15,140	)		(247	)		—			(1,397,028	)
FINANCING ACTIVITIES:
Intercompany activities		(28,997	)		431,648			(395,256	)		(5,748	)		(1,647	)		—
Excess tax benefits related to share-based payment arrangements		23,411			—			—			—			—			23,411
Proceeds from exercise of stock options		9,208			—			—			—			—			9,208
Dividends paid		(2,811	)		—			—			—			—			(2,811	)
Proceeds from new senior secured credit facility—net		—			1,500,048			—			—			—			1,500,048
Repayment on new senior secured credit facility		—			(11,625	)		—			—			—			(11,625	)
Proceeds from 2018 senior subordinated notes—net		—			1,582,184			—			—			—			1,582,184
Repurchase of 2014 senior subordinated notes		—			(1,041,894	)		—			—			—			(1,041,894	)
Repayment of previous senior secured credit facility		—			(780,000	)		—			—			—			(780,000	)
Net cash provided by (used in) financing activities		811			1,680,361			(395,256	)		(5,748	)		(1,647	)		1,278,521
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		811			133,874			(913	)		8,299			—			142,071
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		4,884			226,200			3,028			—			—			234,112
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	5,695		$	360,074		$	2,115		$	8,299		$	—		$	376,183

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2010

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations			Total Consolidated
OPERATING ACTIVITIES	$	—		$	(53,873	)	$	251,175		$	2		$	197,304
INVESTING ACTIVITIES:
Capital expenditures		—			(1,875	)		(11,012	)		—			(12,887	)
Acquisition of businesses, net of cash acquired		—			(166,557	)		—			—			(166,557	)
Proceeds from sale of real estate		—			—			2,885						2,885
Net cash used in investing activities		—			(168,432	)		(8,127	)		—			(176,559	)
FINANCING ACTIVITIES:
Intercompany activities		370,544			(129,373	)		(241,169	)		(2	)		—
Excess tax benefits related to share-based payment arrangements		17,459			—			—			—			17,459
Proceeds from exercise of stock options		6,361			—			—			—			6,361
Dividends paid		(404,868	)		—			—			—			(404,868	)
Proceeds from senior subordinated notes-net		—			404,248			—			—			404,248
Net cash provided by (used in) financing activities		(10,504	)		274,875			(241,169	)		(2	)		23,200
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(10,504	)		52,570			1,879			—			43,945
CASH AND CASH EQUIVALENTS—
Beginning of year		15,388			173,630			1,149			—			190,167
CASH AND CASH EQUIVALENTS—
End of year	$	4,884		$	226,200		$	3,028		$	—		$	234,112

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE YEAR ENDED SEPTEMBER 30, 2009

(Amounts in Thousands)

	TransDigm Group			TransDigm Inc.			Subsidiary Guarantors			Eliminations		Total Consolidated
OPERATING ACTIVITIES	$	—		$	(29,358	)	$	226,470		$	—	$	197,112
INVESTING ACTIVITIES:
Capital expenditures		—			(2,370	)		(10,785	)		—		(13,155	)
Acquisition of businesses, net of cash acquired		—			(155,233	)		—			—		(155,233	)
Net cash used in investing activities		—			(157,603	)		(10,785	)		—		(168,388	)
FINANCING ACTIVITIES:
Intercompany activities		11,455			199,911			(211,366	)		—		—
Excess tax benefits related to share-based payment arrangements		9,278			—			—			—		9,278
Proceeds from exercise of stock options		8,345			—			—			—		8,345
Purchase of treasury stock		(15,242	)		—			—			—		(15,242	)
Net cash provided by (used in) financing activities		13,836			199,911			(211,366	)		—		2,381
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		13,836			12,950			4,319			—		31,105
CASH AND CASH EQUIVALENTS—
Beginning of year		1,552			160,680			(3,170	)		—		159,062
CASH AND CASH EQUIVALENTS—
End of year	$	15,388		$	173,630		$	1,149		$	—	$	190,167

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Consolidated Statements Of Changes In Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]	Total
Beginning balance, value at Sep. 30, 2008	$ 486	$ 365,224	$ 287,745	$ 445		$ 653,900
Beginning balance, shares at Sep. 30, 2008	48,600,848
Treasury stock purchased, shares					(494,100)
Treasury stock purchased, value					(15,242)	(15,242)
Compensation expense recognized for employee stock options		5,782				5,782
Excess tax benefits related to share-based payment arrangements		9,278				9,278
Exercise of employee stock options, shares	842,750
Exercise of employee stock options, value	8	8,337				8,345
Restricted stock compensation		31				31
Common stock issued, shares	4,430
Common stock issued, value		120				120
Comprehensive income (loss):
Net income			162,902			162,902
Interest rate swaps, net of tax				(5,306)		(5,306)
Other comprehensive loss				(648)		(648)
Comprehensive income						156,948
Ending balance, value at Sep. 30, 2009	494	388,772	450,647	(5,509)	(15,242)	819,162
Ending balance, shares at Sep. 30, 2009	49,448,028				(494,100)
Dividends paid			(404,868)			(404,868)
Unvested dividend equivalent payments			(17,098)			(17,098)
Compensation expense recognized for employee stock options		6,693				6,693
Excess tax benefits related to share-based payment arrangements		17,459				17,459
Exercise of employee stock options, shares	477,776
Exercise of employee stock options, value	5	6,356				6,361
Restricted stock compensation		11				11
Common stock issued, shares	2,437
Common stock issued, value		105				105
Comprehensive income (loss):
Net income			163,445			163,445
Interest rate swaps, net of tax				2,467		2,467
Other comprehensive loss				(758)		(758)
Comprehensive income						165,154
Ending balance, value at Sep. 30, 2010	499	419,396	192,126	(3,800)	(15,242)	592,979
Ending balance, shares at Sep. 30, 2010	49,928,241				(494,100)
Compensation expense recognized for employee stock options		12,568				12,568
Excess tax benefits related to share-based payment arrangements		23,411				23,411
Exercise of employee stock options, shares	899,395
Exercise of employee stock options, value	9	9,199				9,208
Restricted stock compensation		6				6
Common stock issued, shares	1,640
Common stock issued, value		120				120
Comprehensive income (loss):
Net income			172,134			172,134
Interest rate swaps, net of tax				(1,077)		(1,077)
Foreign currency translation adjustments				1,498		1,498
Other comprehensive loss				102		102
Comprehensive income						172,657
Ending balance, value at Sep. 30, 2011	$ 508	$ 464,700	$ 364,260	$ (3,277)	$ (15,242)	$ 810,949
Ending balance, shares at Sep. 30, 2011	50,829,276				(494,100)

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Stock-Based Compensation

12 Months Ended

Sep. 30, 2011

Stock-Based Compensation [Abstract]

Stock-Based Compensation

16. STOCK-BASED COMPENSATION

The Company's stock compensation plans are designed to assist the Company in attracting, retaining, motivating and rewarding key employees, directors or consultants, and promoting the creation of long-term value for stockholders by closely aligning the interests of these individuals with those of the Company's stockholders. The Company's stock compensation plans provide for the granting of stock options, restricted stock and other stock-based incentives.

The following table shows the expense recognized by the Company for stock-based compensation (in thousands):

	Fiscal Years Ended September 30,
	2011		2010		2009
Stock option compensation expense:
Performance vested stock options	$	12,568	$	6,693	$	5,695
Time vested stock options		—		—		87
Restricted stock award amortization		6		11		31
	$	12,574	$	6,704	$	5,813

The weighted-average grant date fair value of options granted during the fiscal years ended September 30, 2011, 2010 and 2009 was $33.51, $18.83 and $10.45, respectively.

Compensation expense is recognized based upon probability assessments of awards that are expected to vest in future periods. Such probability assessments are subject to revision and, therefore, unrecognized compensation expense is subject to future changes in estimate. As of September 30, 2011, there was approximately $17.0 million of total unrecognized compensation expense related to non-vested awards expected to vest, which is expected to be recognized over a weighted-average period of three years.

The fair value of the Company's employee stock options was estimated at the date of grant using a Black-Scholes-Merton option-pricing model with the following weighted average assumptions for all options granted during the fiscal years ended:

	Fiscal Years Ended September 30,
	2011	2010	2009
Risk-free interest rate	1.67% to 2.53%	2.45% to 2.96%	1.82% to 2.68%
Expected life of options	6 years	6 years	6 years
Expected dividend yield of stock	—	—	—
Expected volatility of stock	40%	40%	35%

The risk-free interest rate is based upon the Treasury bond rates as of the grant date. The average expected life of stock-based awards is based on vesting schedules and contractual terms. Expected volatility of stock was calculated using a rate based upon the historical volatility of publicly traded companies in the Company's peer group in the aerospace industry. This was used because TD Group's common stock has only been publicly traded since March 2006. Notwithstanding the special cash dividend paid in October 2009, the Company historically has not paid regular cash dividends and does not anticipate paying regular cash dividends in future periods; thus, no dividend rate assumption is used.

The total fair value of shares vested during fiscal years ended September 30, 2011, 2010, and 2009 was $7.8 million, $4.6 million and $4.9 million, respectively.

2006 Stock Incentive Plan

In conjunction with the consummation of the initial public offering, a 2006 stock incentive plan was adopted by TD Group. In July 2008 and March 2011, the plan was amended to increase the number of shares available for issuance thereunder. TD Group has reserved 8,119,668 shares of its common stock for issuance to key employees, directors or consultants under the plan. Awards under the plan may be in the form of options, restricted stock or other stock-based awards. Options granted under the plan will expire no later than the tenth anniversary of the applicable date of grant of the options, and will have an exercise price of not less than the fair market value of our common stock on the date of grant. Restricted stock granted under the plan vests over three years.

On February 24, 2011, the 2006 stock incentive plan was amended to add a market based "sweep," on all outstanding options under the 2006 stock incentive plan which provides that all options will accelerate and become fully vested if the closing price of the Company's common stock exceeds $160 per share on any 60 trading days during any consecutive 12-month period.

During the fiscal year ended September 30, 2011, 1,420 shares of common stock were issued with a weighted-average grant date fair value of $84.30.

Restricted Stock—The following table summarizes activity for restricted stock awards for the fiscal year ended September 30, 2011:

	Number of Shares			Weighted-Average Grant Date Fair Value
Outstanding at September 30, 2010		264		$	37.97
Granted		—			—
Vested		(220	)		37.97
Forfeited		(44	)		37.97
Outstanding at September 30, 2011		—		$	—

Performance Vested Stock Options—All of the options granted through September 30, 2011 under the 2006 stock incentive plan have been pursuant to an equity incentive program adopted by the Company in 2008. Under the 2008 equity incentive program, all of the options granted will vest based on the Company's achievement of established operating performance goals. The following table summarizes the activity, pricing and other information for the Company's performance vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,979,825		$	28.89
Granted		1,786,250			79.55
Exercised		(32,848	)		30.62
Forfeited		(97,142	)		57.18
Outstanding at September 30, 2011		4,636,085		$	47.80		8.0 years	$	157,024,199
Expected to vest		1,769,386		$	42.39		7.8 years	$	69,500,110
Exercisable at September 30, 2011		1,327,095		$	30.98		8.0 years	$	67,270,446

At September 30, 2011, 3,400,151 remaining shares were available for award under TD Group's 2006 stock incentive plan.

2003 Stock Option Plan

Certain executives and key employees of the Company were granted stock options under TD Group's 2003 stock option plan. Upon the closing of the acquisition of the Company by Warburg Pincus in 2003, certain employees rolled over certain then-existing options to purchase shares of common stock of TransDigm Holdings. These employees were granted rollover options to purchase an aggregate of 3,870,152 shares of common stock of TD Group (after giving effect to the 149.60 for 1.00 stock split effected on March 14, 2006). All rollover options granted were fully vested on the date of grant. In addition to shares of common stock reserved for issuance upon the exercise of rollover options, an aggregate of 5,469,301 shares of TD Group's common stock were reserved for issuance upon the exercise of new management options. In general, approximately 20% of all new management options vested based on employment service or a change in control. These time vested options have a graded vesting schedule of up to four years. Approximately 80% of all new management options vested (i) based upon the satisfaction of specified performance criteria, which is annual and cumulative EBITDA As Defined targets through 2008, or (ii) upon the occurrence of a change in control if the Investor Group (defined as Warburg Pincus and the other initial investors in TD Group) received a minimum specified rate of return. Unless terminated earlier, the options expire ten years from the date of grant. All of the outstanding performance options were vested as of September 30, 2011.

TD Group has reserved a total of 9,339,453 shares of its common stock for issuance to the Company's employees under the plan, 9,261,624 of which had been issued as of September 30, 2011.

Time Vested Stock Options —The following table summarizes activity, pricing and other information for the Company's time vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		703,129		$	10.11
Granted		—			—
Exercised		(128,104	)		9.11
Forfeited		—			—
Outstanding at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284
Exercisable at September 30, 2011		575,025		$	10.33		2.6 years	$	41,022,284

Performance Vested Stock Options—The following table summarizes the activity, pricing and other information for the Company's performance vested stock-based award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		2,166,628		$	11.43
Granted		—			—
Exercised		(645,443	)		10.40
Forfeited		—			—
Outstanding at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713
Exercisable at September 30, 2011		1,521,185		$	11.87		3.0 years	$	106,178,713

Rollover Option Awards— The following table summarizes the activity, pricing and other information for the Company's rollover option award activity during the fiscal year ended September 30, 2011:

	Number of Options			Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at September 30, 2010		117,436		$	4.00
Granted		—			—
Exercised		(33,000	)		5.35
Forfeited		—			—
Outstanding at September 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895
Exercisable at Septmeber 30, 2011		84,436		$	3.47		0.8 years	$	6,602,895

The total intrinsic value of time, performance and rollover options exercised during the fiscal years ended September 30, 2011, 2010 and 2009 was $63.0 million, $19.0 million and $26.4 million, respectively.

Options Not Pursuant to a Shareholder Approved Plan

In addition to the stock options issued under the 2003 stock option plan and 2006 stock incentive plan, two members of the Company's Board of Directors were also granted stock options of TD Group. Of the 134,040 options issued under these agreements, 48,096 remain outstanding with an exercise price of $6.68. All of such options were vested as of September 30, 2011.

Dividend Equivalent Plans

Pursuant to the Third Amended and Restated TransDigm Group Incorporated 2003 Stock Option Plan Dividend Equivalent Plan and the Second Amended and Restated TransDigm Group Incorporated 2006 Stock Incentive Plan Dividend Equivalent Plan, all of the options granted under the 2003 stock option plan and the 2006 stock incentive plan are entitled to certain dividend equivalent payments in the event of the declaration of a dividend by the Company. Options granted outside the plans to directors are also entitled to comparable dividend equivalents. The Company declared a special dividend of $7.65 per share in October 2009. See Note 11. As a result, holders of outstanding vested options received dividend equivalents of approximately $33.1 million in the aggregate. In addition, to the extent unvested options outstanding on the dividend declaration date vest, such options will be entitled to receive a dividend equivalent payment in the amount of $7.65 per share at the time of vesting.

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Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Sep. 30, 2011

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule Of Comprehensive Income (Loss)

	2011			2010
Interest rate swap agreements, net of taxes of $2.1 million for 2011 and $1.4 million for 2010	$	(3,500	)	$	(2,423	)
Cumulative foreign currency translation adjustments		1,795			297
Pension liability adjustments, net of taxes of $1.0 million for 2011 and 2010		(1,572	)		(1,674	)
Total	$	(3,277	)	$	(3,800	)

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Supplemental Guarantor Information (Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$ 260,578	$ 197,304	$ 197,112
Capital expenditures	(18,026)	(12,887)	(13,155)
Acquisition of businesses, net of cash acquired	(1,650,363)	(166,557)	(155,233)
Cash proceeds from sale of real estate		2,885
Cash proceeds from sales of discontinued operations	271,361
Net cash used in investing activities	(1,397,028)	(176,559)	(168,388)
Excess tax benefits related to share-based payment arrangements	23,411	17,459	9,278
Proceeds from exercise of stock options	9,208	6,361	8,345
Treasury stock purchased			(15,242)
Dividends paid	(2,811)	(404,868)
Proceeds from new senior secured credit facility - net	1,500,048
Proceeds from senior subordinated notes - net		404,248
Repayment on new senior secured credit facility	(11,625)
Proceeds from 2018 senior subordinated notes - net	1,582,184
Repurchase of senior subordinated notes due 2014	(1,041,894)
Repayment of existing senior secured credit facility	(780,000)
Net cash provided by (used in) financing activities	1,278,521	23,200	2,381
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	142,071	43,945	31,105
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	234,112	190,167	159,062
CASH AND CASH EQUIVALENTS, END OF PERIOD	376,183	234,112	190,167
TransDigm Group [Member]
Supplemental Guarantor Information [Line Items]
Intercompany activities	(28,997)	370,544	11,455
Excess tax benefits related to share-based payment arrangements	23,411	17,459	9,278
Proceeds from exercise of stock options	9,208	6,361	8,345
Treasury stock purchased			(15,242)
Dividends paid	(2,811)	(404,868)
Net cash provided by (used in) financing activities	811	(10,504)	13,836
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	811	(10,504)	13,836
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	4,884	15,388	1,552
CASH AND CASH EQUIVALENTS, END OF PERIOD	5,695	4,884	15,388
TransDigm Inc. [Member]
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(164,846)	(53,873)	(29,358)
Capital expenditures	(2,639)	(1,875)	(2,370)
Acquisition of businesses, net of cash acquired	(1,650,363)	(166,557)	(155,233)
Cash proceeds from sales of discontinued operations	271,361
Net cash used in investing activities	(1,381,641)	(168,432)	(157,603)
Intercompany activities	431,648	(129,373)	199,911
Proceeds from new senior secured credit facility - net	1,500,048
Proceeds from senior subordinated notes - net		404,248
Repayment on new senior secured credit facility	(11,625)
Proceeds from 2018 senior subordinated notes - net	1,582,184
Repurchase of senior subordinated notes due 2014	(1,041,894)
Repayment of existing senior secured credit facility	(780,000)
Net cash provided by (used in) financing activities	1,680,361	274,875	199,911
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	133,874	52,570	12,950
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	226,200	173,630	160,680
CASH AND CASH EQUIVALENTS, END OF PERIOD	360,074	226,200	173,630
Subsidiary Guarantors [Member]
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	409,483	251,175	226,470
Capital expenditures	(15,140)	(11,012)	(10,785)
Cash proceeds from sale of real estate		2,885
Net cash used in investing activities	(15,140)	(8,127)	(10,785)
Intercompany activities	(395,256)	(241,169)	(211,366)
Net cash provided by (used in) financing activities	(395,256)	(241,169)	(211,366)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(913)	1,879	4,319
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,028	1,149	(3,170)
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,115	3,028	1,149
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	14,294
Capital expenditures	(247)
Net cash used in investing activities	(247)
Intercompany activities	(5,748)
Net cash provided by (used in) financing activities	(5,748)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	8,299
CASH AND CASH EQUIVALENTS, END OF PERIOD	8,299
Eliminations [Member]
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	1,647	2
Intercompany activities	(1,647)	(2)
Net cash provided by (used in) financing activities	(1,647)	(2)
Total Consolidated [Member]
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	260,578	197,304	197,112
Capital expenditures	(18,026)	(12,887)	(13,155)
Acquisition of businesses, net of cash acquired	(1,650,363)	(166,557)	(155,233)
Cash proceeds from sale of real estate		2,885
Cash proceeds from sales of discontinued operations	271,361
Net cash used in investing activities	(1,397,028)	(176,559)	(168,388)
Excess tax benefits related to share-based payment arrangements	23,411	17,459	9,278
Proceeds from exercise of stock options	9,208	6,361	8,345
Treasury stock purchased			(15,242)
Dividends paid	(2,811)	(404,868)
Proceeds from new senior secured credit facility - net	1,500,048
Proceeds from senior subordinated notes - net		404,248
Repayment on new senior secured credit facility	(11,625)
Proceeds from 2018 senior subordinated notes - net	1,582,184
Repurchase of senior subordinated notes due 2014	(1,041,894)
Repayment of existing senior secured credit facility	(780,000)
Net cash provided by (used in) financing activities	1,278,521	23,200	2,381
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	142,071	43,945	31,105
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	234,112	190,167	159,062
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 376,183	$ 234,112	$ 190,167

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Fair Value Measurements

12 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

18. FAIR VALUE MEASUREMENTS

The following tables present our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability's classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following summarizes the carrying amounts and fair values of financial instruments as of September 30 (in thousands):

	Level		2011				2010
			Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents		1	$	376,183	$	376,183	$	234,112	$	234,112
Liabilities:
Interest rate swaps(1)		2		5,600		5,600		—		—
Interest rate swap(2)		2		—		—		3,865		3,865
Long-term debt:
Term loans		2		1,538,375		1,496,000		780,000		762,000
7 3/4% Senior Subordinated Notes due 2018		1		1,600,000		1,616,000		—		—
7 3/4% Senior Subordinated Notes due 2014		1		—		—		991,646		1,010,000

(1) Included in Other non-current liabilities on the Consolidated Balance Sheet.

(2) Included in Accrued liabilities on the Consolidated Balance Sheet.

Interest rate swaps are measured at fair value using quoted market prices for the swap interest rate indexes over the term of the swap discounted to present value versus the fixed rate of the contract. The estimated fair value of the Company's term loans was based on information provided by the agent under the Company's Senior Secured Credit Facility. The estimated fair value of the Company's 7 ³/4% Senior Subordinated Notes was based upon quoted market prices.

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Income Taxes (Schedule Of Components Of Income Tax Provision) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Income Taxes [Abstract]
Federal	$ 50,105	$ 78,591	$ 71,700
State	7,109	6,899	7,600
Foreign	1,310
Total Current	58,524	85,490	79,300
Deferred	18,676	1,900	8,800
Income tax provision	$ 77,200	$ 87,390	$ 88,100

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Debt (Debt Outstanding) (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Debt Instrument [Line Items]
Total debt outstanding	$ 3,138,375	$ 1,771,646
Less current portion	15,500
Long-term debt	3,122,875	1,771,646
Term Loans [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding	1,538,375	780,000
7 3/4% Senior Subordinated Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding	1,600,000
Debt instrument, maturity date	2018
7 3/4% Senior Subordinated Notes, Due 2014 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding		$ 991,646
Debt instrument, maturity date	2014

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Description Of The Business

12 Months Ended

Sep. 30, 2011

Description Of The Business [Abstract]

Description Of The Business

1. DESCRIPTION OF THE BUSINESS

Description of the Business—TransDigm Group Incorporated ("TD Group"), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. TransDigm Inc. along with TransDigm Inc.'s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the "Company" or "TransDigm"), offers a broad range of proprietary aerospace components. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group's common stock is listed on The New York Stock Exchange, or the NYSE, under the trading symbol "TDG."

Major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, engineered interior surfaces and lighting and control technology.

Separate Financial Statements—Separate financial statements of TransDigm Inc. are not presented because TransDigm Inc.'s 7 ³/4% senior subordinated notes are fully and unconditionally guaranteed on a senior subordinated basis by TD Group and all existing domestic subsidiaries of TransDigm Inc. and because TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

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Accrued Liabilities

12 Months Ended

Sep. 30, 2011

Accrued Liabilities [Abstract]

Accrued Liabilities

10. ACCRUED LIABILITIES

Accrued liabilities consist of the following at September 30 (in thousands):

	2011		2010
Compensation and related benefits	$	24,824	$	18,146
Interest		37,065		17,747
Product warranties		8,722		8,345
Other		49,701		24,548
Total	$	120,312	$	68,786

Product Warranties—The Company provides limited warranties in connection with the sale of its products. The warranty period for products sold, which varies among the Company's operations, is typically less than two years but can be in the range from 90 days to six years. A provision for the estimated cost to repair or replace the products is recorded at the time of sale and periodically adjusted to reflect actual experience. The following table presents a reconciliation of changes in the product warranty liability for the periods indicated below (in thousands):

	Years Ended September 30,
	2011			2010			2009
Liability balance at beginning of period	$	8,345		$	9,419		$	6,255
Product warranty provision		2,217			880			3,921
Warranty costs incurred		(2,501	)		(2,457	)		(3,004	)
Acquisitions		661			503			2,247
Liability balance at end of period	$	8,722		$	8,345		$	9,419

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Sales And Trade Accounts Receivable (Trade Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2011 Trade Accounts Receivable [Member]	Sep. 30, 2010 Trade Accounts Receivable [Member]
Sales And Trade Account Receivables [Line Items]
Percentage of trade accounts receivables from one company	10.00%
Trade accounts receivable due from foreign entities	30.00%
Trade accounts receivable-gross		$ 192,166	$ 136,731
Allowance for uncollectible accounts		(2,873)	(2,270)
Trade accounts receivable-net		$ 189,293	$ 134,461

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Intangible Assets (Schedule Of Amortization Expense) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Intangible Assets [Abstract]
Aggregate Amortization Expense	$ 40,368	$ 15,079	$ 13,928

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Debt (Future Maturities Of Long-Term Debt) (Details) (USD $) In Thousands	Sep. 30, 2011
Debt [Abstract]
Year ended September 30, 2012	$ 15,500
Year ended September 30, 2013	15,500
Year ended September 30, 2014	15,500
Year ended September 30, 2015	15,500
Year ended September 30, 2016	15,500
Thereafter	3,060,875
Total	$ 3,138,375

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Sales And Trade Accounts Receivable (Tables)

12 Months Ended

Sep. 30, 2011

Sales And Trade Account Receivable [Abstract]

Net Sales By Major Product Offerings

	Years Ended September 30,
	2011		2010		2009
Mechanical/electro-mechanical actuators and controls	$	168,530	$	124,574	$	123,193
Ignition systems, engine sensors, harnesses and related components		153,919		111,834		96,758
Engineered latching and locking devices		150,111		33,746		34,663
Specialized valves		102,664		95,946		55,357
Rods and locking devices		99,556		31,438		29,328
AC/DC electric motors and generators		84,213		57,410		66,584
Specialized pumps		72,116		66,893		71,645
Power conditioning devices		58,683		57,917		57,957
Engineered connectors		57,803		43,945		46,697
NiCad batteries/chargers		57,757		45,583		25,337
Power, lighting and control		55,327		44,849		40,291
Audio systems		44,614		36,870		33,112
Lavatory hardware		38,280		27,753		27,825
Specialized cockpit displays		27,405		27,851		30,861
Elastomers		24,141		21,045		21,944
Other		10,902		—		—
Total	$	1,206,021	$	827,654	$	761,552

Trade Accounts Receivable

	2011			2010
Trade accounts receivable—gross	$	192,166		$	136,731
Allowance for uncollectible accounts		(2,873	)		(2,270	)
Trade accounts receivable—net	$	189,293		$	134,461

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Environmental Liabilities

12 Months Ended

Sep. 30, 2011

Environmental Liabilities [Abstract]

Environmental Liabilities

14. ENVIRONMENTAL LIABILITIES

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. At certain facilities acquired in connection with the acquisition of McKechnie Aerospace or third-party sites utilized by subsidiaries of McKechnie Aerospace, subsidiaries of the Company have been identified as potentially responsible parties under the federal Superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company's environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company's prior experience and professional judgment of the Company's environmental specialists. Estimates of the Company's environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

Accordingly, as investigation and remediation proceed, it is likely that adjustments in the Company's accruals will be necessary to reflect new information. The amounts of any such adjustments could have a material adverse effect on the Company's results of operations or cash flows in a given period. Based on currently available information, however, the Company does not believe that future environmental costs in excess of those accrued with respect to sites for which the Company has been identified as a potentially responsible party are likely to have a material adverse effect on the Company's financial condition.

Environmental liabilities are recorded when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when the Company has recommended a remedy or has committed to an appropriate plan of action. The liabilities are reviewed periodically and, as investigation and remediation proceed, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not reduced by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites.

The Company's consolidated balance sheet includes the following for environmental remediation obligations (in thousands):

	September 30, 2011
Accrued liabilities	$	1,000
Other non-current liabilities		18,888
Total	$	19,888

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Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 376,183	$ 234,112
Trade accounts receivable - Net	189,293	134,461
Inventories	265,317	188,756
Deferred income taxes	30,844	15,200
Prepaid expenses and other	8,655	10,979
Total current assets	870,292	583,508
PROPERTY, PLANT AND EQUIPMENT - Net	150,800	99,613
GOODWILL	2,595,747	1,571,664
TRADEMARKS AND TRADE NAMES	344,942	187,556
OTHER INTANGIBLE ASSETS - Net	483,424	212,838
DEBT ISSUE COSTS - Net	59,007	18,649
OTHER	9,424	3,990
TOTAL ASSETS	4,513,636	2,677,818
CURRENT LIABILITIES:
Current portion of long-term debt	15,500
Accounts payable	62,110	44,226
Accrued liabilities	120,312	68,786
Income taxes payable	8,937
Total current liabilities	206,859	113,012
LONG-TERM DEBT	3,122,875	1,771,646
DEFERRED INCOME TAXES	310,451	168,588
OTHER NON-CURRENT LIABILITIES	62,502	31,593
Total liabilities	3,702,687	2,084,839
STOCKHOLDERS' EQUITY:
Common stock-$.01 par value; authorized 224,400,000 shares; issued 50,829,276 and 49,928,241 at September 30, 2011 and 2010, respectively	508	499
Additional paid-in capital	464,700	419,396
Retained earnings	364,260	192,126
Accumulated other comprehensive loss	(3,277)	(3,800)
Treasury stock, at cost; 494,100 shares at September 30, 2011 and 2010	(15,242)	(15,242)
Total stockholders' equity	810,949	592,979
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 4,513,636	$ 2,677,818

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Property, Plant And Equipment (Tables)

12 Months Ended

Sep. 30, 2011

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment

	2011			2010
Land and improvements	$	40,912		$	29,734
Buildings and improvements		58,692			43,314
Machinery, equipment and other		137,124			99,052
Construction in progress		8,250			5,012
Total		244,978			177,112
Accumulated depreciation		(94,178	)		(77,499	)
Property, plant and equipment—net	$	150,800		$	99,613

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Stock-Based Compensation (Stock-Based Compensation Expense) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award amortization	$ 6	$ 11	$ 31
Total stock-based compensation	12,574	6,704	5,813
Performance Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense	12,568	6,693	5,695
Time Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense			$ 87

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Supplemental Guarantor Information (Condensed Consolidating Statement Of Income) (Details) (USD $) In Thousands	3 Months Ended												12 Months Ended
	Sep. 30, 2011		Jul. 02, 2011		Apr. 02, 2011		Jan. 01, 2011		Sep. 30, 2010	Jul. 03, 2010	Apr. 03, 2010	Jan. 02, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Supplemental Guarantor Information [Line Items]
NET SALES	$ 342,953	[1]	$ 325,209	[1]	$ 304,307	[1]	$ 233,552	[1]	$ 223,117	$ 214,182	$ 206,077	$ 184,278	$ 1,206,021	$ 827,654	$ 761,552
COST OF SALES													544,836	354,588	332,206
GROSS PROFIT	193,016	[1]	183,149	[1]	157,874	[1]	127,146	[1]	132,371	122,433	115,203	103,059	661,185	473,066	429,346
SELLING AND ADMINISTRATIVE EXPENSES													133,711	94,918	80,018
INCOME (LOSS) FROM OPERATIONS													487,135	363,069	335,400
REFINANCING COSTS													72,454
INTEREST EXPENSE - Net													185,256	112,234	84,398
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													229,425	250,835	251,002
INCOME TAX PROVISION (BENEFIT)													77,200	87,390	88,100
INCOME (LOSS) FROM CONTINUING OPERATIONS													152,225	163,445	162,902
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	3,082	[1]	(2,088)	[1]	19,120	[1]	(205)	[1]					19,909
NET INCOME (LOSS)	67,395	[1]	56,280	[1]	55,817	[1]	(7,358)	[1]	50,635	44,005	38,045	30,758	172,134	163,445	162,902
TransDigm Group [Member]
Supplemental Guarantor Information [Line Items]
EQUITY IN INCOME OF SUBSIDIARIES													(172,134)	(163,445)	(162,902)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													172,134	163,445	162,902
INCOME (LOSS) FROM CONTINUING OPERATIONS													172,134
NET INCOME (LOSS)													172,134	163,445	162,902
TransDigm Inc. [Member]
Supplemental Guarantor Information [Line Items]
NET SALES													81,944	64,990	68,660
COST OF SALES													46,438	36,398	38,647
GROSS PROFIT													35,506	28,592	30,013
SELLING AND ADMINISTRATIVE EXPENSES													44,754	31,130	27,010
AMORTIZATION OF INTANGIBLE ASSETS													624	624	624
INCOME (LOSS) FROM OPERATIONS													(9,872)	(3,162)	2,379
REFINANCING COSTS													72,454
INTEREST EXPENSE - Net													183,175	110,127	79,880
EQUITY IN INCOME OF SUBSIDIARIES													(345,158)	(237,334)	(213,190)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													79,657	124,045	135,689
INCOME TAX PROVISION (BENEFIT)													(92,477)	(39,400)	(27,213)
INCOME (LOSS) FROM CONTINUING OPERATIONS													172,134
NET INCOME (LOSS)													172,134	163,445	162,902
Subsidiary Guarantors [Member]
Supplemental Guarantor Information [Line Items]
NET SALES													1,097,662	766,068	694,730
COST OF SALES													479,536	320,288	295,077
GROSS PROFIT													618,126	445,780	399,653
SELLING AND ADMINISTRATIVE EXPENSES													85,796	65,088	53,308
AMORTIZATION OF INTANGIBLE ASSETS													37,900	14,455	13,304
INCOME (LOSS) FROM OPERATIONS													494,430	366,237	333,041
INTEREST EXPENSE - Net													777	2,107	4,518
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													493,653	364,130	328,523
INCOME TAX PROVISION (BENEFIT)													167,822	126,790	115,313
INCOME (LOSS) FROM CONTINUING OPERATIONS													325,831
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX													4,883
NET INCOME (LOSS)													330,714	237,340	213,210
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
NET SALES													31,649
COST OF SALES													24,334
GROSS PROFIT													7,315
SELLING AND ADMINISTRATIVE EXPENSES													3,172
AMORTIZATION OF INTANGIBLE ASSETS													1,815
INCOME (LOSS) FROM OPERATIONS													2,328
INTEREST EXPENSE - Net													1,304
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													1,024
INCOME TAX PROVISION (BENEFIT)													1,855
INCOME (LOSS) FROM CONTINUING OPERATIONS													(831)
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX													15,026
NET INCOME (LOSS)													14,195
Eliminations [Member]
Supplemental Guarantor Information [Line Items]
NET SALES													(5,234)	(3,404)	(1,838)
COST OF SALES													(5,472)	(2,098)	(1,518)
GROSS PROFIT													238	(1,306)	(320)
SELLING AND ADMINISTRATIVE EXPENSES													(11)	(1,300)	(300)
INCOME (LOSS) FROM OPERATIONS													249	(6)	(20)
EQUITY IN INCOME OF SUBSIDIARIES													517,292	400,779	376,092
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													(517,043)	(400,785)	(376,112)
INCOME (LOSS) FROM CONTINUING OPERATIONS													(517,043)
NET INCOME (LOSS)													(517,043)	(400,785)	(376,112)
Total Consolidated [Member]
Supplemental Guarantor Information [Line Items]
NET SALES													1,206,021	827,654	761,552
COST OF SALES													544,836	354,588	332,206
GROSS PROFIT													661,185	473,066	429,346
SELLING AND ADMINISTRATIVE EXPENSES													133,711	94,918	80,018
AMORTIZATION OF INTANGIBLE ASSETS													40,339	15,079	13,928
INCOME (LOSS) FROM OPERATIONS													487,135	363,069	335,400
REFINANCING COSTS													72,454
INTEREST EXPENSE - Net													185,256	112,234	84,398
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES													229,425	250,835	251,002
INCOME TAX PROVISION (BENEFIT)													77,200	87,390	88,100
INCOME (LOSS) FROM CONTINUING OPERATIONS													152,225
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX													19,909
NET INCOME (LOSS)													$ 172,134	$ 163,445	$ 162,902

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

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Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Balance at beginning of period	$ 1,832	$ 3,253
Additions based on tax positions related to the current year	129	40
Reductions for tax positions of prior years	(760)	(1,461)
Acquisitions	6,367
Balance at end of period	$ 7,568	$ 1,832

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Acquisitions (Narrative) (Details) (USD $)	3 Months Ended												12 Months Ended												9 Months Ended					0 Months Ended	3 Months Ended
	Sep. 30, 2011		Jul. 02, 2011		Apr. 02, 2011		Jan. 01, 2011		Sep. 30, 2010	Jul. 03, 2010	Apr. 03, 2010	Jan. 02, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Dec. 06, 2010	Sep. 30, 2011 7 3/4% Senior Subordinated Notes, Due 2014 [Member] McKechnie Aerospace Holdings, Inc. [Member]	Sep. 30, 2011 7 3/4% Senior Subordinated Notes, Due 2018 [Member] McKechnie Aerospace Holdings, Inc. [Member]	Jul. 01, 2011 7 3/4% Senior Subordinated Notes, Due 2018 [Member] McKechnie Aerospace Holdings, Inc. [Member]	Sep. 30, 2011 Senior Subordinated Notes Due 2017 [Member] McKechnie Aerospace Holdings, Inc. [Member]	Jul. 01, 2011 Senior Subordinated Notes Due 2017 [Member] McKechnie Aerospace Holdings, Inc. [Member]	Aug. 31, 2011 Schneller Holding LLC [Member]	Jul. 02, 2011 Talley Actuation [Member]	Dec. 31, 2010 Talley Actuation [Member]	Sep. 30, 2011 McKechnie Aerospace Holdings, Inc. [Member]	Jul. 01, 2011 McKechnie Aerospace Holdings, Inc. [Member]	Dec. 06, 2010 McKechnie Aerospace Holdings, Inc. [Member]	Jan. 01, 2011 Semco Instruments [Member]	Sep. 03, 2010 Semco Instruments [Member]	Dec. 02, 2009 Dukes Aerospace [Member]	Jul. 02, 2011 Dukes Aerospace [Member]	Feb. 28, 2010 Woodward HRT Product Line [Member]	Aug. 10, 2009 Woodward HRT Product Line [Member]	Oct. 31, 2010 Acme Aerospace [Member]	Jul. 24, 2009 Acme Aerospace [Member]	Nov. 30, 2009 Aircraft Parts Corporation [Member]	Dec. 16, 2008 Aircraft Parts Corporation [Member]
Business Acquisition [Line Items]
Cash consideration for the acquisitions																						$ 288,500,000		$ 93,600,000			$ 1,270,000,000		$ 73,600,000	$ 95,500,000			$ 48,700,000		$ 40,900,000		$ 66,900,000
Purchase price adjustment paid																										300,000		3,000,000						200,000		700,000
Purchase price adjustment received																							300,000								200,000	700,000
Debt instrument, stated percentage																	7.75%	7.75%
Debt instrument, face amount	3,138,375,000												3,138,375,000						1,600,000,000
Debt instrument, maturity date																	2014	2018		2017
Term loan borrowings																					1,550,000,000
Expected recognition of goodwill deductible for tax purposes																						195,000,000		70,000,000						64,000,000			27,000,000
Expected recognition of goodwill not deductible for tax purposes																864,004,000									864,000,000				41,000,000						32,000,000		50,000,000
Net sales	342,953,000	[1]	325,209,000	[1]	304,307,000	[1]	233,552,000	[1]	223,117,000	214,182,000	206,077,000	184,278,000	1,206,021,000	827,654,000	761,552,000										212,200,000
Total potential earn-out payments																														60,000,000
Potential earn-out period, in years																														4
Fair value liability for potential earn-out payments																														8,000,000
Potential earn-out payments reversed																															$ 3,000,000
Estimated useful life of aircraft (in years)													30

[1] Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

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Property, Plant And Equipment (Details) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Property, Plant And Equipment [Abstract]
Land and improvements	$ 40,912	$ 29,734
Buildings and improvements	58,692	43,314
Machinery, equipment and other	137,124	99,052
Construction in progress	8,250	5,012
Total	244,978	177,112
Accumulated depreciation	(94,178)	(77,499)
Property, plant and equipment-net	$ 150,800	$ 99,613

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Debt (Special Cash Dividend Payment) (Narrative) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2009	Jan. 02, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Special Cash Dividend Payment [Line Items]
Special cash dividend paid per share	$ 7.65			$ 7.65
Net proceeds from debt after issuance fees and expenses			$ 1,500,048,000
Special cash dividend and dividend equivalents paid		404,900,000	2,800,000
7 3/4% Senior Subordinated Notes, Due 2014 [Member]
Special Cash Dividend Payment [Line Items]
Proceeds from issuance of debt	425,000,000
Net proceeds from debt after issuance fees and expenses	$ 404,500,000

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Discontinued Operations (Tables)

12 Months Ended

Sep. 30, 2011

Discontinued Operations [Abstract]

Summarized Operating Results For The Discontinued Fastener And AQS Business

	Fiscal Year Ended September 30, 2011
Net sales	$	24,058
Loss from discontinued operations before income taxes	$	(2,917	)
Income tax benefit		794
Loss from discontinued operations		(2,123	)
Net gain on sales of discontinued operations, net of tax		22,032
Income from discontinued operations	$	19,909

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Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2011

Sep. 30, 2010

Quarterly Financial Data (Unaudited) [Abstract]

Schedule Of Quarterly Financial Information

	First Quarter Ended January 1, 2011			Second Quarter Ended April 2, 2011		Third Quarter Ended July 2, 2011			Fourth Quarter Ended September 30, 2011
	(in thousands, except per share amounts)
Year Ended September 30, 2011(1):
Net sales	$	233,552		$	304,307	$	325,209		$	342,953
Gross profit		127,146			157,874		183,149			193,016
Net income (loss) from continuing operations	$	(7,153	)	$	36,697	$	58,368		$	64,313
Net income (loss) from discontinued operations		(205	)		19,120		(2,088	)		3,082
Net income (loss)	$	(7,358	)	$	55,817	$	56,280		$	67,395
Net earnings (loss) per share from continuing operations—basic and diluted	$	(0.19	)	$	0.69	$	1.10		$	1.20
Net earnings (loss) per share from discontinued operations—basic and diluted		—			0.35		(0.04	)		0.06
Net earnings (loss) per share—basic and diluted	$	(0.19	)	$	1.04	$	1.06		$	1.26

(1) Restated to reflect amounts reclassified to discontinued operations due to the Company's sale of the fastener business and AQS (see Note 21).

	First Quarter Ended January 2, 2010		Second Quarter Ended April 3, 2010		Third Quarter Ended July 3, 2010		Fourth Quarter Ended September 30, 2010
	(in thousands, except per share amounts)
Year Ended September 30, 2010
Net sales	$	184,278	$	206,077	$	214,182	$	223,117
Gross profit		103,059		115,203		122,433		132,371
Net income		30,758		38,045		44,005		50,635
Net earnings per share—basic and diluted	$	0.01	$	0.72	$	0.83	$	0.96

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Sales And Trade Accounts Receivable (Net Sales By Major Product Offerings) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Sales And Trade Account Receivables [Line Items]
Sales Percentage Associated With Major Customers	14.00%	14.00%	13.00%
Total Net Sales	$ 1,206,021,000	$ 827,654,000	$ 761,552,000
Mechanical/Electro-Mechanical Actuators And Controls [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	168,530,000	124,574,000	123,193,000
Ignition Systems, Engine Sensors, Harnesses And Related Components [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	153,919,000	111,834,000	96,758,000
Engineered Latching And Locking Devices [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	150,111,000	33,746,000	34,663,000
Specialized Valves [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	102,664,000	95,946,000	55,357,000
Rods And Locking Devices [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	99,556,000	31,438,000	29,328,000
AC/DC Electric Motors And Generators [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	84,213,000	57,410,000	66,584,000
Specialized Pumps [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	72,116,000	66,893,000	71,645,000
Power Conditioning Devices [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	58,683,000	57,917,000	57,957,000
Engineered Connectors [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	57,803,000	43,945,000	46,697,000
NiCad Batteries/Chargers [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	57,757,000	45,583,000	25,337,000
Power, Lighting And Control [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	55,327,000	44,849,000	40,291,000
Audio Systems [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	44,614,000	36,870,000	33,112,000
Lavatory Hardware [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	38,280,000	27,753,000	27,825,000
Specialized Cockpit Displays [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	27,405,000	27,851,000	30,861,000
Elastomers [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	24,141,000	21,045,000	21,944,000
Foreign Country [Member]
Sales And Trade Account Receivables [Line Items]
Export Sales	305,500,000	170,600,000	150,400,000
Other [Member]
Sales And Trade Account Receivables [Line Items]
Total Net Sales	$ 10,902,000

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Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2011

Intangible Assets [Abstract]

Intangible Assets Subject To Amortization

	2011						2010
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Technology	$	546,726	$	75,426	$	471,300	$	257,913	$	52,781	$	205,132
Order backlog		24,799		17,895		6,904		23,613		21,883		1,730
License agreement		9,373		4,336		5,037		9,373		3,804		5,569
Other		1,600		1,417		183		1,600		1,193		407
Total	$	582,498	$	99,074	$	483,424	$	292,499	$	79,661	$	212,838

Schedule Of Amortization Expense

Years ended September 30,
2011	$	40,368
2010		15,079
2009		13,928

Schedule Of Estimated Amortization Expense

Years ending September 30,
2012	$	34,458
2013		27,561
2014		27,561
2015		27,561
2016		27,561

Intangible Assets Acquired

	Cost		Amortization Period
Intangible assets not subject to amortization:
Goodwill	$	1,129,145		None
Trademarks and trade names		174,600		None
Intangible assets subject to amortization:
Technology		314,900		20 years
Order backlog		24,754		1 year
		339,654		18.6 years
Total	$	1,643,399

Summary Of Changes In The Carrying Value Of Goodwill

Balance at September 30, 2009	$	1,462,310
Goodwill acquired during the year (Note 2)		107,065
Other		2,289
Balance at September 30, 2010		1,571,664
Goodwill acquired during the year (Note 2)		1,129,145
Divestitures (Note 21)		(103,880	)
Other		(1,182	)
Balance at September 30, 2011	$	2,595,747