COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 35 (Bonanza) Series Aeroplanes AD/BEECH 35/39 Fuel System Placards 7/73 Applicability: All models with S/Nos. D-1 to D-9319. Requirement: Action in accordance with Beechcraft SIs 0491-281, 0493-281 or 0495-281 as applicable. Tank inspections are to be performed on all aircraft with baffled fuel cells unless previously inspected in accordance with AD/BEECH 35/28. Compliance: Within 100 hours time in service after 31 July 1973.