COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters
AD/HU 369/79 Tail Rotor Transmission Output Shaft Duplex Bearings
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Applicability: All model 369D, 369E and 369F/FF series helicopters with P/N 369D25400 tail rotor assemblies installed.
Requirement: Action in accordance with McDonnell Douglas S.I.N No DN-161, EN-51 or FN-38, as applicable.
Compliance: At the next periodic inspection for issue of a Maintenance Release or by 30 June 1990, whichever occurs first.
Background: Duplex bearings fitted to the tail rotor gearbox output shaft may have been manufactured with excessive tolerances. To confirm the bearing tolerance is within limits a one time inspection for excessive play in the output shaft, is required.