COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/22 Escape Slide/Raft Lanyard Assembly - Inspection 3/80 Applicability: All model 747 equipped with escape slide/raft assemblies P/N 7A1238, 7A1239, 7A1255, 7A1256, 7A1257 and 7A1261, manufactured prior to January 1979. Document: FAA AD 79-18-02, Amdt. 39-3537. Note: Boeing Alert SB No. 747-25A2467 and B.F. Goodrich Alert SB No. 25-051 refer. Compliance: Unless already accomplished initially inspect before 1 June 1980 and thereafter at intervals not exceeding 1 year. Background: During slide/raft refurbishment a number of firing lanyard assemblies have been found corroded and/or frayed.