COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes AD/TSA-600/8 Main Cabin Door - Inspection 3/77 Applicability: All models 600 and 601 with S/Nos. up to 0375. Document: Ted smith Corp. SB No. SB600-61. Compliance: Within 25 hours time in service after 31 March 1977.