A T310R HAD BOTH ENGS AND TURBOCHARGERS OVERHAULED WITH AIRWORTHINESS DIRECTIVE 2000-01-16 ACCOMPLISHED. NO METHOD OF PROVING EXHAUST COMPONENTS WERE OVERHAULED WITHIN PRECEDING 12 YRS.

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I WAS CALLED IN TO DO AN ANNUAL INSPECTION ON A TURBOCHARGED C310 THAT HAD BEEN INVOLVED IN AN ACCIDENT AND THE REPAIRS WERE COMPLETED. WHEN I SAW THE AIRPLANE; BOTH ENGS; PROPS AND TURBOCHARGERS HAD ALREADY BEEN OVERHAULED AND RE-INSTALLED. THE MECHS THAT DID THE WORK HAVE EXTENSIVE EXPERIENCE WITH TURBOCHARGED NAVAJOS. I ASKED ABOUT AIRWORTHINESS DIRECTIVE 2000-01-16 CONCERNING THE EXHAUST SYS; AND WAS ASSURED THAT IT HAD BEEN THOROUGHLY INSPECTED; WAS FOUND IN GOOD CONDITION; AND THAT THE 'V' BAND CLAMPS HAD BEEN REPLACED WITH NEW. AFTER AN EXTENSIVE INSPECTION OF THE INSTALLATION; REPAIRS; AND OVERALL CONDITION OF THE ACFT; I SIGNED IT OFF AS AIRWORTHY; INCLUDING COMPLIANCE WITH AIRWORTHINESS DIRECTIVE 2000-01-16. WE GOT A CALL ON DEC/MON/04 FROM THE OWNER'S MECH STATING THAT HE FELT WE HAD NOT COMPLETELY COMPLIED WITH THE AIRWORTHINESS DIRECTIVE. I AGREED THAT ON ITEM G OF FIGURE 1 IT COULDN'T BE PROVED THAT THE EXHAUST COMPONENTS IN QUESTION WERE OVERHAULED WITHIN THE PRECEDING 12 YRS. HE IS REMOVING THE COMPONENTS TO BE SENT OUT FOR OVERHAUL AND WE WILL PAY FOR THE REMOVAL AND REPLACEMENT. I RECOMMEND THAT FIGURE 1; ITEM G BE REWORDED TO: 'REMOVE THE EXHAUST SYS FROM THE SLIP JOINTS AFT TO ALL TURBOCHARGER ATTACHED COMPONENTS; AND SEND TO ANY FAA APPROVED EXHAUST REPAIR FACILITY;' AT WHICHEVER OCCURS LATER; ETC. THAT SHOULD ELIMINATE ANY CONFUSION ON THIS MATTER.