AD/AC/5 Landing Gear Selector Valve Removal of An 6207 Check Valve 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/5.

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

AD/AC/5 Landing Gear Selector Valve - Removal
of AN 6207 Check Valve 8/2008

Requirement:

CANCELLED.

This AD is cancelled on 31 July 2008.

Background:

This unique Australian AD, raised prior to 1961 against Aero Design (also known as Aero Commander) Service Bulletin (SB) No. 63, required the removal of a check valve from the landing gear selector valve to prevent a pressure block in the main gear retract cylinder.

Compliance was forthwith.

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

James Coyne
Delegate of the Civil Aviation Safety Authority

13 June 2008