AD/HU 369/79 Tail Rotor Transmission Output Shaft Duplex Bearings Cancelled (Cth)

AIRWORTHINESS DIRECTIVE

On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/HU 369/79.

McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/79 Tail Rotor Transmission Output
Shaft Duplex Bearings 6/2009

Requirement:

CANCELLED.

This AD is cancelled on 4 June 2009.

Background:

This unique Australian AD raised in 1989 against McDonnell Douglas Helicopter Company Service Information Notice (SIN) No. DN-161, EN-51 or FN-38, as applicable, requiring a one-time inspection of tail rotor transmission output shaft that may have been fitted with duplex bearings that are out of tolerance.

Compliance was:  At next periodic inspection for issue of a maintenance release or by 30 June 1990, whichever occurs first.

This AD has been sufficiently promulgated for the affected aircraft to have been inspected by now; therefore this AD is considered to be no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

24 April 2009