AD/PA-25/12 Amdt 2 Exhaust System Inspection 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/PA-25/12 Amdt 2.

Piper PA-25 (Pawnee) Series Aeroplanes

AD/PA-25/12 Amdt 2 Exhaust System - Inspection 12/2008

Requirement:

CANCELLED.

This AD is cancelled on 20 November 2008.

Background:

This unique Australian AD specified inspection of the exhaust system in accordance with Piper SL No. 324C at intervals not exceeding 100 hours time in service.  USA AD 68-15-01 mandates SL No. 324B for many types of Piper aircraft, but not the
PA-25.  The recent service history of the exhaust system in the PA-25 indicates use of an AD to mandate periodic inspection of the exhaust system is no longer warranted.

The periodic inspection of the exhaust system specified in USA AD 67-14-07 for some PA-25-235 aircraft was mandatory in Australia until 1974 when AD/PA-25/26 was cancelled.  It has now been restored in AD/PA-25/43.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

10 October 2008