What was found
DURING TAKEOFF ROLL, A SLIGHT OIL ODOR WAS IN THE CABIN AND COCKPIT. COM PROCEDURE WAS COMPLETED AND THE NR 2 PACK SHUT OFF FOR REMAINDER OF FLIGHT. PERFORMED TSM 05-50-810-831-A, FOUND THE NR 1 ENGINE DEOILER OVERBOARD VENT LEAKING OIL, R & R MATING RING & SEAL ASSY IAW AMM 72-60-31. AS A FAULT CONFIRMATION RAN BOTH ENGINES WITH BOTH PACKS ON, NO FUMES NOTED OR OIL ODOR AT THIS TIME IAW AMM 71-00-00.