COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/52 Horizontal Stabilizer Trailing Edge Closure Rib Inboard Terminal Fitting - Inspection Applicability: All models. Document: Boeing SB No. 55-35. Compliance: Forthwith. 7/67