AD/CL-600/9 Junction Box No. 2 Vertical Navigation and Glide Slope Relay 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/CL-600/9.

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

AD/CL-600/9 Junction Box No.2 - Vertical Navigation
and Glide Slope Relay - Modification 12/2009

Requirement:

CANCELLED.

This AD is cancelled on 19 November 2009.

Background:

This AD, raised in 1983 against Canadair Challenger Service Bulletin (SB) No.
600-0211, required a modification by interchanging two wires at the vertical navigation and glide slope relay (K1FA) within avionic junction box No.2.  Compliance was required before issue of an Australian Certificate of Airworthiness.

As all affected aircraft would have been modified long ago, this AD is no longer required.

David Villiers
Delegate of the Civil Aviation Safety Authority

27 September 2009