COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES American Champion (Aeronca, Bellanca) Series Aeroplanes AD/CHA/5 Lower Fuselage Longerons 11/71 Applicability: Model 7ECA, 7GCAA, 7GCBC and 7KCAB. Requirement: Action in accordance with Champion SL No. 96. Compliance: Within 100 hours time in service after 30 November 1971.