As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL ODOR SMELL IN COCKPIT WHILE RUNNING PACKS NR 1 & 2 ON APU BLEED AIR. TRANSFERRED TO NRWC 606-ORD-01972. TROUBLE SHOT IAW FIM 21-20-00-810-803A. ABNORMAL SMELL IN COCKPIT & CABIN, UNKNOWN SOURCE. FOUND APU OIL OVER SERVICED. DRAINED OIL DOWN TO FULL LIMIT. GND RAN TO CLEAN OIL CONTAMINATION FROM DUCTS IAW AMM 21-20-00-100-805A. NO DEFECTS NOTED.