Exhibit 3.17

STATE OF DELAWARE

SECRETARY OF STATE

DIVISION OF CORPORATIONS

FILED 01:30 PM 12/14/2000

001627783 — 3330118

CERTIFICATE OF FORMATION

OF

V. T. AVIATION LLC

1.	The name of the limited liability company is V.T. AVIATION LLC.
2.	The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

          IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation of V.T. AVIATION LLC this 14th day of December, 2000.

/s/ Madonna Cuddihy  

Madonna Cuddihy, Organizer 

(DEL. — LLC 3239 — 3/7/95)