AD/DHC-6/29 Airframe De-Icing System 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/DHC-6/29.

DHC-6 (Twin Otter) Series Aeroplanes

AD/DHC-6/29 Airframe De-Icing System - Modification 12/2008

Requirement:

CANCELLED.

This AD is cancelled on 20 November 2008.

Background:

This AD was raised in 1971 against De Havilland Aircraft of Canada Service Bulletin (SB) No. 6/275, requiring a modification to introduce an indication to flight crew when a horizontal stabiliser de-icing failure has occurred.

Compliance was before 1 September 1971.

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

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

10 October 2008