COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 207 Series Aeroplanes AD/CESSNA 207/16 Goodyear Fuel Cells 6/78 Applicability: All models 207 and T207 fitted with Goodyear BTC-39 fuel cells. Requirement: Action in accordance with Cessna SL No SE78-10. Compliance: Within 100 hours time in service after 30 June 1978 and annually thereafter as detailed in Cessna SL No SE78-10.