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-600/26 Nacelle Fairing - Modification 8/80 Applicability: Models 600, 601 and 601P with S/Nos. 0001 to 0799. Document: 1. Piper SB No. SB600-83; or 2. FAA AD 80-12-14, Amendment 39-3801. Compliance: Before 1 March 1981. Background: The lower engine nacelle aft fibreglass fairing is inadequate to prevent flames from a possible engine fire entering the lower wing structure.