AD/Bell 47/91 Tail Rotor Blade Assembly P/N 47-642-117-1 Replacement 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/BELL 47/91.

Bell Helicopter Textron 47 (All Variants) Series Helicopters

AD/BELL 47/91 Tail Rotor Blade Assembly
P/N 47-642-117-1 - Replacement 2/2009

Requirement:	CANCELLED.
This AD is cancelled on 12 February 2009.
Background:	This unique Australian AD, issued in 1985, required the replacement of tail rotor blades in accordance with Bell Alert Service Bulletin 47-84-11.  This AD was issued because a number of tail rotor blades S/N A-8 to 72 may have been manufactured with bonding voids in the root area.  The AD compliance was within 100 hours time in service after 31 January 1985 or at the next scheduled inspection for maintenance release.  As all affected blades would have been removed from service, the AD is no longer required.

David Punshon
Delegate of the Civil Aviation Safety Authority

11 December 2008