COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/57 Thrust Reverser Deflector Doors - Modification 8/68 Applicability: All models. Requirement: 1. Modify the thrust reverser deflector doors in accordance with Boeing SB No. 78- 51, Rev. 1. 2. Modify the thrust reverser deflector doors in accordance with Boeing SL 6-7132- 3375 dated 1 March 1967 (or later revision). 3. Replace bolt P/N BAC-B30EK8-48 or P/N BAC-C30EK8-48C. Compliance: Forthwith.