AD/B767/194 - Aft Pressure Bulkhead Radial Stiffener (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

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 39.1 (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/B767/194 Aft Pressure Bulkhead Radial Stiffener 7/2004

Applicability: Model 767-300 series aircraft, line numbers 754, 761, 767, 775, and 776. Requirement: Action in accordance with the technical requirements of FAA AD 2004-08-07 Amdt 39-13576.

Note: Boeing Service Bulletins 767-53A0102 original issue, and Revision 1 refer.

Compliance: Within 18 months after 8 July 2004.

This Airworthiness Directive becomes effective on 8 July 2004.

Background: The FAA requires certain actions in order to prevent interference of the A1 galley with the radial stiffener on the aft pressure bulkhead, which could result in fatigue crack propagation. Fatigue crack propagation could lead to possible rapid decompression of the aircraft or to damage and/or interference with the aircraft control systems that pass through the bulkhead, and consequent loss of control of the aircraft.

David Villiers Delegate of the Civil Aviation Safety Authority 26 May 2004