AD/B767/227 Bulkhead Structure at STA 1809.5 (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/B767/227 Bulkhead Structure at STA 1809.5 2/2007

Applicability:

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

Requirement:

Action in accordance with the technical requirements of FAA AD 2006-24-04
Amdt 39-14833.

Note:  Boeing Alert Service Bulletin 767-53A0131 original issue, or later FAA approved revision, refers.

Compliance:

As specified in the Requirement document, with a revised effective date of
15 February 2007.

This Airworthiness Directive becomes effective on 15 February 2007.

Background:

The FAA received reports of fatigue cracks that were detected in the forward outer chord and horizontal inner chord at STA 1809.5 bulkhead.  Such cracking, unless detected and corrected, could result in failure of the bulkhead to carry the flight loads of the horizontal stabiliser, with consequent loss of aircraft controllability.

David Villiers
Delegate of the Civil Aviation Safety Authority

19 December 2006