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 35/5 Angle of Attack Indicator - Modification 7/77 Applicability: All model 35 and 36 with S/Nos. 35-002 to 35-061 and 36-002 to 36-017 that do not incorporate reduced speed system kit AAK 76-4. Document: Gates Learjet Kit AMK 76-8. Compliance: Forthwith.