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-N22/16 Amdt 1 Horizontal Stabiliser Rivets - Inspection 1/78 Applicability: All models N22 with S/Nos. N22-2, N22-3, N22-4, N22-8, N22-9, N22-17, N22-24, N22B-5, N22B-6, N22B-7, N22B-11, N22B-12, N22B-13, N22B-15, N22B-16, N22B-18 to N22B-23, N22B-25 to N22B-28 and N222-31. All models N24 with S/Nos. N24-30, N24-32 and N24-34. Document: GAF Alert SB No. AN22-55-3, Rev. 1. Compliance: Unless already accomplished, before further flight, and there-after at intervals not exceeding 100 hours time in service until modified.