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/B767/192 Aft Pressure Bulkhead Web 5/2004 Applicability: Model 767-200 and -300 series aircraft, line numbers 1 through 423. Requirement: Inspect in accordance with the technical requirements of FAA AD 2004-05-16 Amdt 39-13511. Note: Boeing Alert Service Bulletin 767-53A0087 refers. Compliance: As specified in the Requirement document, with a revised effective date of 13 May 2004. This Airworthiness Directive becomes effective on 13 May 2004. Background: Reports were received of cracks in the aft pressure bulkhead web to pressure chord joint on Models 737 and 747 aircraft. Due to the structural similarity, inspection has been extended to the Model 767 aircraft. Cracks in the aft pressure bulkhead web can result in rapid decompression and/or damage to, or interference with, control systems that penetrate the dome. David Villiers Delegate of the Civil Aviation Safety Authority 2 April 2004 The above AD is notified in the Commonwealth of Australia Gazette on 21 April 2004. Page 1 of 1