Airworthiness Directive · Amendment 39-14209 · Bell Helicopter Textron Model 206A and 206B Helicopters
Bell Helicopter Textron Model 206A and 206B Helicopters
Model 206A and 206B helicopters modified by Aeronautical Accessories, Inc. Supplemental Type Certificate SH1392SO, with high forward crosstube, part number (P/N) 206-321-001 with serial number (S/N) 1001 through 1152, and high aft crosstube, P/N 206-321-002 with S/N 2001 through 2152, installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for Bell Helicopter Textron (Bell) Model 206A and 206B helicopters modified by Aeronautical Accessories, Inc. Supplemental Type Certificate (STC) SH1392SO with certain part-numbered high crosstubes. This amendment requires inspecting at specified time intervals and replacing any cracked crosstubes. This amendment is prompted by the discovery of a cracked high forward crosstube. The actions specified by this AD are intended to detect a crack in the crosstube which could lead to failure of the crosstube, collapse of the landing gear, and subsequent loss of control of the helicopter.
To detect a crack in the crosstube, which could lead to failure of the crosstube, collapse of the landing gear, and subsequent loss of control of the helicopter, accomplish the following:
(a) Within 300 hours time-in-service (TIS) or 60 days, whichever occurs first, and after that at intervals not to exceed 300 hours TIS or 12 months, whichever occurs first, remove each crosstube and inspect it for cracks. Replace any cracked crosstube with an airworthy crosstube before further flight.
Note: Aeronautical Accessories, Inc. Alert Service Bulletin No. AA-03121, dated October 25, 2004, pertains to the subject of this AD.
(b) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Rotorcraft Certification Office, Rotorcraft Directorate, FAA, for information about previously approved alternative methods of compliance.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
