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-600/31 Turbocharger Oil System Supply Hose - Replacement 7/83 Applicability: All models of PA-60-601 Aerostar with S/Nos. 61-0342-112 through 61-0880- 8162157 and prior airframe sequence numbers having retrofit option 106 (automatic wastegate controller) installed. PA-60-601P Aerostar with S/Nos. 61P-0157-001 through 61P-0860-8163455. PA-60-602P Aerostar with S/Nos. 62P-0750-8165001, 62P-0861-8165002 through 60-8365010. Document: Piper SB No. 761. Compliance: Within 100 hours time in service after 31st August 1983. Background: Reports have been received by the manufacturer of burned and chafed Turbocharger oil supply hoses. This condition will be alleviated by the fitting of higher temperature hoses and rerouting.