As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR PREVALENT AFTER TAKEOFF AND THROUGHOUT FLIGHT. ODOR STRONGEST FROM RT PACK ON THE NR 2 ENGINE BLEED. NO CONTAMINATION WAS FOUND. FOUND TURBINE OIL ODOR ISOLATED TO THE NR 2 ENGINE. SUSPECT ISSUE WITH BUFFER AIR VALVE. REPLACED NR 2 ENGINE BUFFER AIR VALVE IAW AMM 75-22-01. RAN THE NR 2 ENGINE AT HIGH POWER, OIL ODOR IN CABIN WITH RT PACK RUNNING. NO OIL ODOR FROM THE NR 1 ENGINE. REPLACED THE NR 2 ENGINE IAW AMDS 7100-9901-02.