COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/129 Fuselage Circumferential Joint Doubler BS259, 360, 441, 481 and 681 Applicability: 727-100 line position 1 through 547. 727-200 line position 433 through 549. 3/91 Requirement: Action in accordance with the technical requirements of FAA AD 90-26-09 Amdt 39- 6835. Note: Boeing SB 727-53-0084 Rev. 4 refers. Compliance: As specified in the Requirement Document. Background: Country of origin AD. Delamination, corrosion and/or cracking if not corrected, could result in loss of cabin pressurisation.