COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes AD/AC/10 Fuel Line Routing - Modification NK Applicability: All models: S/Nos. 231 to 690. Document: 1. Aero Commander SB No. 54; or 2. FAA AD 59-16-1. Compliance: Forthwith.