AD/OM-P/2 Cylinder Heads Inspection and Replacement 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/OM-P/2.

Omnipol Piston Engines

AD/OM-P/2 Cylinder Heads - Inspection and Replacement 9/2009

Requirement:

CANCELLED.

This AD is cancelled on 27 August 2009.

Background:

This unique Australian AD raised in 1985 against 1963 Omnipol Service Bulletin (SB) No. N4-111/20 and M6-111/17 required an inspection and modification by replacement of cylinder heads of Walter Minor 4-111 and 6-111 engines with S/Nos. 34405 and below.

Compliance was:  Inspection at intervals not exceeding 50 hours TIS until modified. Modification before installation following next complete overhaul after 1 September 1963.

Given the extended period this AD has been promulgated, and that affected engines would have been modified by now, this AD is considered to be no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

15 July 2009