COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 310 Series Aeroplanes AD/CESSNA 310/28 Main Landing Gear Upper Strut - Inspection 3/72 Applicability: All models with S/Nos. as listed in Requirement Document. Requirement: Action in accordance with Cessna SL ME71-28. Compliance: Before issue of a Certificate of Airworthiness.