COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-30 Series Aeroplanes AD/SD3-30/2 Fuselage Top Skin Sealing - Inspection 11/81 Applicability: All model SD3-30 with S/Nos. SH3002 to SH3072. Document: Shorts SB No. SD3-53-41 Rev. 1. Compliance: Within 300 hours time in service after 30 November 1981 and thereafter at intervals not exceeding 2400 hours time in service. Background: Instances of fuel spillage entering the passenger compartment through joints in the top skin have been reported to the manufacturer.