AD/ELECT/4 Magnetos BTH Earthing Modification 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/ELECT/4.

Electrical Equipment

AD/ELECT/4 Magnetos BTH - Earthing Modification 2/2009

Requirement:

CANCELLED.

This AD is cancelled on 12 February 2009.

Background:

This unique Australian AD raised prior to 1964 required a modification to Magnetos BTH AG4, SG4 and MC1 types with contact breaker covers to ensure positive connection of the magneto switch lead to the magneto earthing spring and bush assembly.

Compliance was before installation in an aircraft.

As all affected batteries would have been modified by now, this AD is considered to be no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

23 December 2008