AD 81-17-01

81-17-01 BENDIX: Amendment 39-4183. Applies to Bendix Starting Vibrator Assemblies, Part Numbers 10-176485-121, -122, -241, -242; 10-382780-12, -24 installed in but not limited to the following aircraft powered by reciprocating engines.

Bell (Textron) Model 47 series helicopters Brantley (Hynes) Model B2 series helicopters Enstrom Model F28, F28A, F28F; 280, 280F helicopters, Model F28C and 280C helicopters equipped with Avco Lycoming HIO-360-E1BD engines Hughes (Summa Corp.) Model 269 series helicopters Hiller (Fairchild Industries) Model UH12 series helicopters Robinson Model R-22 series helicopters

To preclude the loss of ignition due to the grounding of both "P" (Primary) leads within the starting vibrator, accomplish the alteration and identification shown in the Detailed Instruction of Bendix Engine Products Division Service Bulletin No. 614 or an FAA approved equivalent within the next 25 hours time in service after the effective date of this ADunless previously accomplished.

Equivalent inspections and Procedures must be approved by the Chief of the Engineering and Manufacturing Branch, AEA-210, Federal Aviation Administration (FAA) Eastern Region.

As permitted by FAR 21.197, aircraft may be flown to a base where maintenance required by this airworthiness directive can be accomplished.

This amendment becomes effective August 13, 1981.