AD/Artouste/4 Micropump Valve Rod 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/ARTOUSTE/4.

Turbomeca Turbine Engines - Artouste Series

AD/ARTOUSTE/4 Micropump Valve Rod - Modification 7/2009

Requirement:

CANCELLED.

This AD is cancelled on 2 July 2009.

Background:

This unique Australian AD raised prior to 1966 against Turbomeca Artouste IIIB Modification No. M35, or AD/TURB-T/2 required a modification to replace the valve assembly of the micropump with a strengthened rod to eliminate power plant shut down due failure of the rod resulting from resonance effect.

Compliance was:  Forthwith.

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

18 May 2009