COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gates Learjet 35 and 36 Series Aeroplanes AD/LEARJET 35/4 Upper Wing Skin Fasteners - Inspection 10/76 Applicability: All model 35 with S/Nos. 35-001 to 35-054 and model 36 with S/Nos. 36-001 to 36- 017. Document: Gates Learjet SB 35/36-57-1A. Compliance: Within 150 hours time in service after 29 October 1976 unless modified in accordance with SB 35/36-57-1.