As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA'S REPORTED SMELLING FUMES PRIOR TO LANDING. FOLLOWED TSM 05-50-00-810-831-A. COSRS POINTED TO NR 1 ENGINE. DURING NR 1 ENG INSPECTION FOUND DE-OILER OVERBOARD VENT FULL OF OIL. PER TSM R/R DE-OILER - CARBON SEAL IAW AMM 72-60-31. PERFORMED NR 1 ENG. IDLE PACK 1 ON/ PACK 2 OFF RUN, NR 2 ENG. ONLY IDLE RUN PACK 1 ON/ PACK 2 OFF & PACK 2 ON/ PACK 1 OFF (ALSO ON NR 1 ENG). NO SMELL NOTICED DURING OR AFTER ENGINE RUN, WITH ENG 1, ENG 2 OR APU BLEED IAW AMM 71-00-00.