COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 207 Series Aeroplanes AD/CESSNA 207/24 Fuel Cap Alignment Placard 9/80 Applicability: Models 207 and T207 with S/Nos 20700001 to 20700588. Requirement: Action in accordance with Cessna SIL No SE 80-59. Compliance: Within 100 hours time in service after 30 September 1980. Background: Correct alignment of flush fitting type fuel caps is essential for efficient operation of the fuel tank secondary vent system.