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/1 Rudder Pedal Guard 3/67 Applicability: Models 7ECA, 7GCAA, 7GCBC and 7GCB. Requirement: Action in accordance with Champion SL No 73. Compliance: Before 1 September 1971.