AD/CL-600/10 Autopilot Duplex Servo Installation of Protective Cover 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/CL-600/10.

Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes

AD/CL-600/10 Autopilot Duplex Servo - Installation
of Protective Cover 11/2009

Requirement:

CANCELLED.

This AD is cancelled on 22 October 2009.

Background:

This unique Australian AD raised in 1983 against Canadair Challenger Service Bulletin (SB) No. 600-0171 required a modification recommended by the manufacturer to introduce a protective cover to prevent the possibility of foreign objects jamming the autopilot duplex servo capstan.

Compliance was:  Before issue of an Australian Certificate of Airworthiness.

This AD was applicable to CL-600-1A11 aircraft S/No.1005 to1008 and 1010 to 1075.  All other CL-600-1A11 aircraft were scheduled for modification in production.  It is considered that this AD has been sufficiently promulgated for the affected aircraft to have been modified by now; therefore this AD is no longer required.

James Coyne
Delegate of the Civil Aviation Safety Authority

11 September 2009