COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Pratt and Whitney Turbine Engines - PW4000 Series

AD/PW4000/10 Engine Stability Improvements 4/2002

Applicability:  Pratt and Whitney PW4000 engines as specified by model in FAA AD 2001-25-11. Requirement:              Action in accordance with the requirements of FAA AD 2001-25-11.

Note 1: FAA AD 2001-25-11 supersedes FAA AD 99-17-16 and FAA AD 2001-15-12.

Note 2: CASA AD/PW4000/5 and AD/PW4000/9 Amdt 1 are superseded by this AD.

Compliance: As detailed in the requirement document with a revised effective date of 18 April 2002.

This Airworthiness Directive becomes effective on 18 April 2002.

Background: PW4000 engines are found to be susceptible to instability during take off and climb.

Action mandated by this Directive limits the number of engines with potential instability on each aircraft and introduces revised testing and build standards for engines returned to service.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 5 March 2002

The above AD is notified in the Commonwealth of Australia Gazette on 27 March 2002.

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