What was found
WALKED INTO ACFT APU BLEED ON, SMELLED TURBINE OIL, SMALL ODOR UPON ENTRY TO CABIN AND COCKPIT. ODOR CONFIRMED BY F/O AND F/A'S AS WELL AS MECHANICS. PERFORMED TSM 21-00-00-810-801-A. NO LEAK FOUND ON APU, VISUAL AND INSPECTION, NO EXTERNAL LEAK FOUND. PERFORMED DECONTAMINATION OF ENVIROMENTAL CONTROLS SYSTEM, ECS IAW AMM 21-00-00-615-001-A AND 21-00-00-615-002-A. NO HELP SMELL CAME BACK FURTHER TROUBLESHOOTING REQUIRES. ACCOMPLISHED BORESCOPE IAW AMM 49-20-00-290-001. NO DEFECT NOTED. NO LEAKS NOTED.