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/34 Flap Attachment Fittings 9/86 Applicability: All model Learjet 24 & 25 with Serial Numbers. 24-328 to 24-357, 25-135, 25-188 and 25-205 to 25-367. Requirement: Inspect in accordance with Gates Learjet S.B. 24/25-333. Compliance: Within 200 hours time in service after 30 September 1986. Background: Cracking of the flap attachment fitting has become evident in service. Failure of a flap attach fitting may result in an asymmetric flap condition.