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/20 Alternator - Field Cable Protection 6/78 Applicability: All models fitted with an Alternator System. Requirement: Install a 5 AMP circuit protective device (i.e. in line fuse or circuit breaker) in the field cable as close as practical to the master switch. Compliance: Within 100 hours time in service after 30 June 1978.