As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. FLIGHT ATTENDANT NOTICED A STRONG ACIDIC ODOR IN CABIN FROM ROW 5 AND BACK AS AIRCRAFT APPROACHED GATE, BEFORE DOORS OPENED. MAINTENANCE FOUND ENGINE NR 1 FCOC WETTING IN BREATHER DUCT AND REPLACED ENGINE NR 1 DE-OILER CASING SEAL ON DIVERTER VALVE PER AMM 72-60-31. SEE ALSO AALA201703089009.