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 35/10 Cabin Altitude Pressure Limiter - Installation 1/79 Applicability: Model 35 with S/Nos. 35-001 to 35-112 except S/No. 35-107; Model 36 with S/Nos. 36-001 to 36-031. Document: Learjet Airplane Mod. Kit AMK 78-5. Compliance: Within 600 hours time in service after 31 January 1979.