AD/Cessna 170/2 Right Wing Rear Spar 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/CESSNA 170/2.

Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes

AD/CESSNA 170/2 Right Wing Rear Spar 8/2008

Requirement:	CANCELLED.
This AD is cancelled on 31 July 2008.
Background:	This airworthiness directive required reinforcement of the right rear wing spar in accordance with Cessna Service Letter 170/172-6.  This resulted from the discovery of a production tooling mark on the flange of the outboard section of the spar and the possibility of fatigue cracks initiating from the tooling mark.  The compliance of the AD was before 1 September 1971.  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

17 June 2008