As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME ODOR OBSERVED IN FLIGHT DECK WHILE ON DESCENT FL 250, ISOLATED W/ PACK 1 OFF -IAW TSM 05-50-00-991-01200-00-A FOUND ENG#1 DEOILER SEAL LEAKING. R & R SEAL IAW AMM 72-60-31. LEAK CHECK GOOD. PERFORMED LVL A DECONTAMINATION IAW AMM 21-00-00. NO FURTHER ODORS DETECTED. ACFT OK FOR CONTINUED SERVICE.