COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 77 (Skipper) Series Aeroplanes AD/BEECH 77/7 Amdt 1 Shoulder Harness Attach Bracket 9/81 Applicability: All model 77 with S/Nos. WA-3 to WA-235, WA-237, WA-238, WA-240 to WA- 254, WA-256, WA-258, WA-261 to WA-264, WA-266, WA-267 and WA-269. Requirement: Action in accordance with Beechcraft SI No. 1173, Rev. 1. Note: FAA AD 81-09-05 Amdt 39-4101 refers. Compliance: Within 100 hours' time in service after 30 September 1981. Background: Requirement document extends the applicability to include additional serial numbers which may have the shoulder harness attach bracket installed with insufficient rivets and fastener edge distance.