COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gates Learjet 24 & 25 Series Aeroplanes AD/LEARJET/13 Spoiler System - Inspection 9/75 Applicability: All model 24 with S/Nos. 24-100 to 24-302 and 24-309 to 24-317, and all model 25 with S/Nos. 25-003 to 25-194. Document: Gates Learjet SB 23/24/25-265. Compliance: As detailed in the requirement document.