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/2 Spoiler Actuator Attachment Bolts - Replacement 6/73 Applicability: All model 24 with S/Nos. 24-178 to 24-268 and model 25 with S/Nos. 25-020 to 25- 114. Document: Gates Learjet SB No. 24/25-237B. Compliance: As detailed in the requirement document.