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 35/6 Wing to Fuselage Attachment - Modification 9/77 Applicability: All models 35 with S/Nos. 35-001 to 35-110 except 35-107; All models 36 with S/Nos. 36-001 to 36-031. Requirement: Modify the wing to fuselage attachment to accordance with Gates Learjet Kit No. AMK 77-6. Compliance: Within 300 hours time in service after 30 September 1977.