AD/AC/35 Rudder Torque Tube 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/AC/35.

Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/35 Rudder Torque Tube - Modification 8/2008

Requirement:	CANCELLED.
This AD is cancelled on 31 July 2008.
Background:	This unique Australian AD, raised in 1967 against Aero Commander Service Letter (SL) No. 203, required drilling a drain hole in the rudder torque tube as no provision was made for water drainage during manufacture, and this had led to internal corrosion of the torque tube.  Compliance was required within 100 hours TIS after 7 September 1967.  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

19 June 2008