COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SC7 (Skyvan) Series Aeroplanes AD/SC7/23 Main Landing Gear Lever 10/95 Applicability: All Skyvan 3, 3A, 3M, and Skyliner series aeroplanes. Requirement: Inspect and rework the main landing gear levers in accordance with Dowty Mandatory Service Bulletin (MSB) 32-9M, Revision 3. Note: CAA (UK) AD 003-03-86 refers. Compliance: Before 17 February 1996 or in accordance with the thresholds and intervals specified in Dowty MSB 32-9M, Revision 3, whichever is the later. Background: The inspections and modifications are required to extend the service life up to 30 000 landings for aircraft of 12 500 lb. AUW or 27 000 landings for aircraft of 13 700 lb. AUW.