What was found
FLT#670, SJC-JFK. 'AIRCRAFT HAS A "DIRTY SMELL" SMELL. TURNED APU BLEED OFF SEEMED TO GET A LITTLE LESS SMELL; REF INFO NOTICE 2017-T015I. FOUND APU TO BE THE CAUSE OF THE ODOR. APU IS LEAKING INTERNALLY. FOUND OIL WITHIN THE CENTER DRAIN TUBE & DRAIN MASS. PERFORMED LEVEL A DECON IAW AMM 21-00-00. R/R RECIRCULATION FILTERS IAW AMM 21-21-41. AND PERFORMED ANOTHER DECON IAW AMM 21-00-00. ODOR NO LONGER PERSISTS. A/C OK FOR SERVICE.'