Ad/Al 250/56 Amdt 1 - Engine Quick Disconnect Magnetic Plugs - Inspection of Lockpins and Slots for Wear - 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/AL 250/56 Amdt 1.

Allison Turbine Engines - 250 Series

AD/AL 250/56 Amdt 1 Engine Quick Disconnect Magnetic
Plugs - Inspection of Lockpins and
Slots for Wear 10/2009

Requirement:

CANCELLED.

This AD is cancelled on 24 September 2009.

Background:

This unique Australian AD raised in 1985 against Allison Commercial Engine Bulletin Allison 250-C18 CEB-A-233 Rev.1, Allison 250-C20, C20B, C20F, C20JCEB-A-1211 Rev.1, Allison 250-B15GTP CEB-A-103 Rev.1, Allison 250-B17, B17B, B17CTP CEB-A-11172 Rev.1 and Allison 250-C28B, C28C CEB-A-72-2092 Rev.1, as appropriate, required a repeat inspection at intervals of 100 hours for wear of engine quick disconnect magnetic plug locking pins and slots.

Compliance was:  In accordance with requirement document.

Given the extended period this AD has been promulgated and no defect of this kind, appropriate to the engine type/model, has been recorded in the mandatory defect recording system following compliance with this AD, it is considered that this AD is no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

14 August 2009