COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 206 Series Aeroplanes AD/CESSNA 206/33 Fuel Cap Alignment Placard 9/80 Applicability: Model 206 with S/Nos. 206-0001 to 206-0275. Models U206 and TU206 with S/Nos. U206-0276 to U206-1444 and U20601445 to U20605522. Models P206 and TP206 with S/Nos. P206-0001 to P206-0603 and P20600604 to P20600647. 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.