COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES GAF N22 and N24 Series Aeroplanes AD/GAF-N22/11 Amdt 1 Relocation of Pilot Seat Installations 5/77 Applicability: Model N22 with S/Nos. 2 and 4. Model N22B with S/Nos. 7, 25, 26, 27 and 28. Requirement: Modify position of both Pilot seat installations in accordance with GAF SB N22.25.1. Compliance: Before 1 May 1977.