As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW COMMENTS: OIL SMELL IN CABIN, WORSE ONCE AIRBORNE. OIL LEAKAGE DUE TO BEARING FAILURE. SMELL WAS NEVER TRACED TO A PARTICULAR COMPONENT, HOWEVER THE NR 1 ENG WAS REPLACED DUE TO AN OIL LEAK AROUND 4TH STAGE IGV AT 6 O'CLOCK POS AND LEASE RETURN AGREEMENTS. THE APU WAS ALSO REPLACED SHORTLY AFTERWARD WITH OIL LEAK ISSUES. AFTER ALL MTC, THE A/C HAS REMAINED CLEAR OF GRIPES FOR OIL SMELL IN CABIN.