Airworthiness Directive · Amendment 39-13841 · Bell Helicopter Textron Canada Model 206L-1 and 206L-3 Helicopters
Bell Helicopter Textron Canada Model 206L-1 and 206L-3 Helicopters
Model 206L-1 and 206L-3 helicopters with Instrument Flight Rule (IFR) Kit, part number (P/N) 206-705-001, -101, or -103, and a magnetic brake, P/N 204-001-376-003, manufactured by Memcor Truohm, Inc. (M.T. Inc.) as P/N MP 498-3, installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (Bell) model helicopters that requires a one-time inspection of the adjustable stop screws of the magnetic brake assembly; repairing, as appropriate, certain mechanical damage to the cyclic and collective flight control magnetic brake arm assembly (arm assembly), if necessary; and installing the stop screw with the proper adhesive, adjusting the arm assembly travel and applying slippage marks. This amendment is prompted by reports that the magnetic brake adjustable screws have backed out, which limited travel of the arm assembly. The actions specified by this AD are intended to detect loose adjustable stop screws, that could result in limiting the travel of the cyclic and collective arm assembly, and subsequent loss of control of the helicopter.
To detect loose adjustable stop screws, which could result in limiting the travel of the cyclic and collective arm assembly, and subsequent loss of control of the helicopter, accomplish the following:
(a) Inspect and, if necessary, repair, adjust, and apply slippage marks to the magnetic brake assembly by following the Accomplishment Instructions, paragraphs 6. through 12., in Bell Helicopter Textron Alert Service Bulletin (ASB) No. 206L-01-122, dated October 3, 2001, except if damage to the arm assembly exceeds 0.030 inch (0.762 mm), replace the magnetic brake assembly with an airworthy magnetic brake assembly. Contacting the manufacturer is not required.
(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 Safety Management Group, 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.
