AD/B767/222 Station 1725.5 Area Cracking (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Boeing 767 Series Aeroplanes

AD/B767/222 Station 1725.5 Area Cracking 7/2006

Applicability:

Model 767-200, -300, -300F, and -400ER series aircraft.

Requirement:

Action in accordance with the technical requirements of FAA AD 2006-09-09 Amdt 39-14580.

Note:  Boeing Special Attention Service Bulletin 767-53-0118 original issue, or later FAA approved revision, refers.

Compliance:

As specified in the Requirement document, with a revised effective date of
6 July 2006.

This Airworthiness Directive becomes effective on 6 July 2006.

Background:

The FAA received reports of cracking in the skin panel common to stringer 7R and aft of STA 1725.5 butt splice, and in the strap of the bulkhead outer chord at STA 1725.5.  Undetected cracking in the skin, the bulkhead outer chord, or the strap of the bulkhead outer chord in the above area, could progress into surrounding areas and result in reduced structural integrity of the support structure for the vertical or horizontal stabiliser and subsequent loss of control of the aircraft.

David Villiers
Delegate of the Civil Aviation Safety Authority

23 May 2006