AD/AL 250/2

Compressor Front Bearing Thrust
Washer and Spring - Replacement

6/2009

Requirement:

CANCELLED.

This AD is cancelled on 4 June 2009.

Background:

This unique Australian AD raised in 1968 against Allison Commercial Engine Bulletin (CEB) 250 CEB-6 required a modification by replacing the compressor front bearing thrust washer and spring to eliminate the possibility of the washer becoming offset which could result in improper loads on the front compressor bearing outer race.

Compliance was:  Before installation in an aircraft following next overhaul completed after 13 June 1968.

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.