AD/HU 369/73 Tail Rotor Fork Bolt 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 369/73.

McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/73 Tail Rotor Fork Bolt 6/2009

Requirement:

CANCELLED.

This AD is cancelled on 4 June 2009.

Background:

This unique Australian AD raised in 1988 against McDonnell Douglas Helicopter Company Service Information Notice (SIN) No. HN-212, DN-153, EN-43, FN-32, as applicable, requiring an inspection and modification of the tail rotor fork bolt by establishing the date of manufacture for possible replacement of the bolts with new improved bolts.

Compliance was:

1.    Inspect within 25 hours TIS after 31 January 1988, including those tail rotor fork bolts and rotor assemblies held as spares prior to their installation.

2.    Replace at the next 300 hour or annual inspection, or at next disassembly of the tail rotor assembly, whichever occurs first.

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

James Coyne
Delegate of the Civil Aviation Safety Authority

24 April 2009