AD/S-76/47 Engine and Engine Compartment Drain Lines 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-76/47.

Sikorsky S-76 Series Helicopters

AD/S-76/47 Engine and Engine Compartment Drain Lines 7/2009

Requirement:

CANCELLED.

This AD is cancelled on 2 July 2009.

Background:

This unique Australian AD raised in 1987 against Sikorsky Alert Service Bulletin (ASB) 76-71-9 required an inspection and modification following manufacturer report that sections of the engine combustion chamber and exhaust casing lower drain lines made from urethane have cracked after a lengthy time period.

Compliance was:  Within 100 hours TIS after 31 August 1987, inspect in accordance with Section 2 Para A of requirement document.

This AD has been sufficiently promulgated for the affected Helicopters 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

18 May 2009