COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 337 Series Aeroplanes AD/CESSNA 337/11 Aileron Control Tube - Inspection and Automatic Pilot Roll Servo - Removal Applicability: Model 337 fitted with Mitchell Automatic Pilot Models AK155, AK155E or 2/72 AK155E-3 not modified in accordance with Edo-Aire Mitchell Service Letter ML 32. Document: 1. Edo-Aire Mitchell Service Bulletin MB6; or 2. FAA AD 72-2-6. Compliance: Within 25 hours time in service after 25 February 1972.