COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 60 (Duke) Series Aeroplanes AD/BEECH 60/32 Goodyear Fuel Cells 6/78 Applicability: Models 60, A60 and B60 with S/Nos. P-3 to P-278, fitted with Goodyear BTC-39 fuel cells. Requirement: Action in accordance with Beechcraft SI No. 0895. Compliance: Within 100 hours' time in service after 30 June 1978 and thereafter at intervals not exceeding twelve months.