COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/88 Amdt 2 Main Cargo Door Cam Support Fittings 7/84 Applicability: All 727-100 series aircraft listed in the requirement document. Document: Boeing Alert Service Bulletin 727-52A124. Revision 6 including Addendum. Note: FAA AD 80-08-10 also refers. Compliance: As detailed in requirement document. Background: Cracking of these fittings has been found in service and has been attributed to cabin pressurisation fatigue. Alert SB 727-52A124 has been revised to incorporate all pertinent inspection requirements into applicable sections of the Service Bulletin.