What was found
ON TAXI OUT AFTER BOTH ENGINES RUNNING PILOTS NOTIFIED AN ODOR THEN CONFIRMED WITH FLIGHT CREW THROUGH THE AIRCRAFT. PERFORMED T/S PER TSM A350 21-21-XX-54001-421A-A. UPON RUNNING THE NBR 1 ENG, AN OIL ODOR WAS DETECTED. INSPECTED ENG AND AREA NO LEAK NOTED. PERFORMED HIGH-POWER ENG RUN ON BOTH ENG TO PURGE OIL ODOR. ODOR NO LONGER NOTED. STILL IN PROGRESS BY 503677. FOLLOWED MSI PREVENTION. REPLACED RECIRCULATION FILTER PER AMM 21-21-51. ENG RUN CHECKED NO SMELL NOTED. A/C OK FOR SVC. (LP# 8181892)