COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/22 Main Landing Gear Actuator Beam - Inspection and Modification 3/66 Applicability: All models. Document: Boeing SB No. 32-76. Compliance: Inspect before 3,000 hours total time in service and thereafter at intervals not exceeding 200 hours time in service until modified in accordance with SB No. 32-76.