AD/S-76/58 Tail Gearbox Output Shaft 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/S-76/58.

Sikorsky S-76 Series Helicopters

AD/S-76/58 Tail Gearbox Output Shaft 7/2009

Requirement:

CANCELLED.

This AD is cancelled on 2 July 2009.

Background:

This unique Australian AD raised in 1992 against Sikorsky Alert Service Bulletin (ASB) 76-66-27 required a one-time inspection of the tail rotor gearbox output shaft internal bore for surface irregularity/groove.

Compliance was:  Within 150 hours TIS from 30 April 1992 or by 30 August 1992, whichever occurs first.

This AD has been sufficiently promulgated for the affected Helicopters 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

18 May 2009