COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace (Scottish Aviation) Twin Pioneer Series Aeroplanes AD/SA-TP/27 Auto-Pilot Emergency Cut Out Control NK Applicability: All models fitted with Sperry type ALIA or AL3 autopilot. Document: Scottish Aviation Mod. No. C989. Compliance: Forthwith.