8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549
FORM 8-K
CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of report (Date of earliest event reported) May 5, 2011
BUTLER NATIONAL CORPORATION (Exact Name of Registrant as Specified in its Charter)
Kansas (State or Other Jurisdiction of Incorporation)
0-1678 (Commission File Number)	41-0834293 (IRS Employer Identification No.)
19920 W. 161st Street, Olathe, Kansas (Address of Principal Executive Offices)	66062 (Zip Code)
913-780-9595 (Registrant's Telephone Number, Including Area Code)
Not Applicable (Former Name or Former Address, if Changed Since Last Report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01	Other Events
Item 9.01	Financial Statements and Exhibits
Exhibit 99	Press release by Butler National awarded contract with one of the largest aerial mapping firms in South America.
On May 5, 2011 Butler National Corporation issued a press release announcing it had been awarded a contract with one of the largest aerial mapping firms in South America. See attached Exhibit 99.

SIGNATURES
Pursuant to the requirements 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.
	BUTLER NATIONAL CORPORATION (Registrant)
May 5, 2011 Date	/S/ Clark D. Stewart Clark D. Stewart (President and Chief Executive Officer)
May 5, 2011 Date	/S/ Angela D. Shinabargar Angela D. Shinabargar (Chief Financial Officer)

EX-99

Exhibit 99
Butler National Awarded Contract With One Of The Largest Aerial Mapping Firms In South America
OLATHE, Kan., May 5, 2011 /PRNewswire/ -- Butler National Corporation (OTCQB: BUKS -News), a leader in the growing global market for structural modification, maintenance, repair and overhaul (MRO) has contracted with Horizons South America S.A.C. to install provisions for advanced aerial cameras & sensors in its fleet of aircraft. The new installation will allow the Horizons fleet to deliver dual sensor data acquisition technology for mining and oil companies in Colombia and Peru. Alejandro Talavera, CEO of Horizons South America S.A.C. said, "The aerial data required to meet simultaneous acquisitions under the same weather conditions for environmental studies is very rigorous. Butler National's sophisticated dual camera STC package allows us to meet these criteria." Craig Stewart, President of Butler's Aerospace Division, added, "We continue to focus on international business as a key growth driver for the company. This installation builds on our existing relationship with Horizons that includes a dual camera provision on its turboprop twin-engine aircraft. We are the only aerospace company in the world that holds the FAA Supplemental Type Certificate (STC) for this type of modification. Today, we hold more than 250 STCs which are a significant barrier to entry in the MRO industry." Butler National's presence in South America is one of many international projects underway as the company continues to strengthen its leadership in the global MRO marketplace.
Butler National Corporation 26 International Markets Served in the Last Five Years
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26	Country Algeria Australia Bolivia Brazil Burkina Faso Canada Chile Columbia Denmark France Germany Iceland India Indonesia Israel Italy Kazakhstan Malaysia Mexico Republic of China Republic of South Africa Saudi Arabia Spain Sweden Ukraine United Kingdom	Continent Africa Australia South America South America Africa North America South America South America Europe Europe Europe Europe Asia Asia Asia Europe Asia Asia North America Asia Africa Asia Europe Europe Europe Europe
GROWTH IN REVENUES AND SHARE PRICE
Butler National Corporation share price increased 39% in 2010. For the most recent fiscal year, the Company achieved revenue growth of 80.1% and was: 5th fastest-growing publicly traded Aerospace & Defense company including 115 companies with combined revenues of $443 billion 10th fastest-growing publicly traded company in the Midwest including 923 publicly traded companies with combined revenues of $2.7 trillion The fastest-growing publicly traded company in Kansas including 28 companies with combined revenues of $61 billion Our Business: Butler National Corporation operates in the Aerospace and Services business segments.  The Aerospace segment focuses on the manufacturing of support systems for "Classic" commercial and military aircraft including the Butler National TSD for the Boeing 737 and 747 Classic aircraft, switching equipment for Boeing McDonnell Douglas Aircraft, weapon control systems for Boeing Helicopter and performance enhancement structural modifications for Learjet, Cessna, Dassault and Beechcraft business aircraft.  Services include electronic monitoring of water pumping stations, temporary employee services, gaming services and administrative management services. Forward-Looking Information: The information set forth above includes "forward-looking statements" as outlined in the Private Securities Litigation Reform Act of 1995 and Section 21E of the Securities Exchange Act of 1934.  Words such as "anticipate," "estimate," "expect," "project," "intend," "may," "plan," "predict," "believe," "should" and similar words or expressions are intended to identify forward-looking statements.  Investors should not place undue reliance on forward-looking statements, and the Company undertakes no obligation to publicly update or revise any forward-looking statements.  All forward-looking statements reflect the present expectation of future events of our management and are subject to a number of important factors, risks, uncertainties and assumptions that could cause actual results to differ materially from those described in the forward-looking statements.  These factors and risks include, but are not limited to the Cautionary Statements and Risk Factors, filed as Exhibit 99 and Section 1A to the Company's Annual Report on Form 10-K, incorporated herein by reference.  Investors are specifically referred to such Cautionary Statements and Risk Factors for discussion of factors, which could affect the Company's operations, and forward-looking statements contained herein.
FOR MORE INFORMATION CONTACT:
Reign Strategy & Investment Group			Ph (914) 479-9060
Lou Albert Rodriguez
lou.albert@reigninvestment.com
www.reigninvestment.com
Jim Drewitz, Public Relations			Ph (830) 669-2466
jim@jdcreativeoptions.com
Butler National Corporation Investor Relations			Ph (214) 498-7775
WEB: Please review www.butlernational.com for pictures of our products and details about Butler National Corporation and its subsidiaries.