AD/S-76/37 Engine Fire Extinguisher Harness Modification 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-76/37.

Sikorsky S-76 Series Helicopters

AD/S-76/37 Engine Fire Extinguisher
Harness - Modification 7/2009

Requirement:

CANCELLED.

This AD is cancelled on 2 July 2009.

Background:

This unique Australian AD raised in 1985 against Sikorsky Alert Service Bulletin (ASB) 76-26-1 required a modification to fire extinguisher harness P/No
76552-10128-041 and -042 by a wiring change to arrange the dual primers into a parallel configuration to improve system redundancy.

Compliance was:  Within 100 hours TIS after 30 April1985.

This AD has been sufficiently promulgated for the affected seats 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

18 May 2009