COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SAAB SF340 Series Aeroplanes AD/SF340/42 Nose and Main Landing Gear 2/94 Applicability: Model SF340A with serial numbers 004 through 159. Model 340B with serial numbers 160 through 346. Requirement: Action in accordance with SAAB Service Bulletin 340-32-094. Note: LFV AD 1-061 refers. Compliance: As specified in the Requirement Document with short term action to be performed within 600 landings after 3 February 1994. Background: Extension and retraction problems have been experienced in service as a result of loose retract actuator brackets. An investigation revealed that bolt shear had occurred at the head of one of the two bracket retaining bolts, which resulted in bracket movement.