AD/DHC-6/28 Engine Compressor Inlet Screens Icing Restrictions 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-6/28.

DHC-6 (Twin Otter) Series Aeroplanes

AD/DHC-6/28 Engine Compressor
Inlet Screens - Icing Restrictions 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. 6/282, requiring aircraft equipped with PT6-20 and -27 engines and having fine hole compressor debris screens fitted, to have an 'icing limitations' placard installed in the cockpit indicating altitude/temperature restrictions when operating in visible moisture conditions.

Compliance was before 1 September 1971.

As all affected aircraft would have the placard installed by now, this AD is considered to be no longer required.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

10 October 2008