AD/DHE/1 Accessory Drive Shaft Modification to Provide Weak Neck 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/DHE/1.

De Havilland Piston Engines

AD/DHE/1 Accessory Drive Shaft - Modification
to Provide Weak Neck 6/2009

Requirement:

CANCELLED.

This AD is cancelled on 4 June 2009.

Background:

This unique Australian AD raised prior to 1962 against DH Mod. G1018; or DH Mod. G1079; or ANO 106.1.7.0.1.1, applicable to Gipsy Six II and Gipsy Queen II engines, required a modification to provide a weak neck in the accessory drive shaft.

Compliance was:  Before installation in an aircraft.

This AD has been sufficiently promulgated for the affected engines to have been 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