COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piaggio P166 Series Aeroplanes AD/P166/9 Generator Circuit - Modification NK Applicability: S/Nos. prior to 409. Requirement: Remove remote reset circuit breakers fitted between the generator and the reverse circuit relay. Circuit protectors (either limiters or remote reset circuit breakers) shall be installed between the bus and the reverse current relay. Limiters, if used, need not be accessible in flight. Compliance: Forthwith.