COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 310 Series Aeroplanes AD/CESSNA 310/56 Amdt 1 Main Landing Gear Wheel Bay Wing Rib and Wing Skin 10/95 Applicability: Cessna 310 aircraft, all models. Requirement: Inspect the main landing gear side brace upper support attach bolts for correct torque. Clean and do a close visual inspection of the main landing gear wheel well ribs in accordance with Cessna Service Letter (SL) ME76-2. Visually inspect the wing upper surface skin in the overwing baggage locker for cracking. Pay particular attention to the inboard side of the locker. Compliance: Initially inspect before 100 hours time in service after 20 July 1995 or before 25 hours time in service after 14 September 1995, whichever occurs later. Re-inspect at intervals not to exceed 100 hours time in service. Installation of Cessna Service Kit SK414-8E or repair to a scheme acceptable to the Authority cancels Requirement of this Directive. This Amendment is effective from 14 September 1995. Background: There have been five reports of cracking of main landing gear wheel well ribs on Australian registered aircraft. In a number of cases cracks have also been reported in the wing upper surface skin in the baggage locker. Extensive cracking of the wing ribs could result in collapse of the main landing gear. This amendment clarifies that the Directive is applicable to all model 310 aircraft and adds repairs acceptable to the Authority as suitable terminating action.