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-N22/21 Amdt 1 Control Wheel Assembly Retaining Pin - Inspection 8/78 Applicability: As detailed in GAF Alert SB AN22-27-8. Document: GAF Alert SB AN22-27-8 Revision 1. Compliance: Within 10 hours time in service after 3 July 1978.