As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT EXPERIENCED DIRTY SOCKS SMELL COMPLIED WITH OS AFTER PACK 1 SHUTOFF SMELL DISSIPATED. PERFORMED INSPECTION AND PACK BURNOUT IAW AMM 21-00-00, FOUND THE NR 1 ENG DE-OILER CASING SEAL ASSEMBLY LEAKING OIL. REMOVED AND REPLACE THE DE-OILER CASING SEAL ASSY IAW AMM 72-60-31. OPS CHECK GOOD, NO DEFECT OR SMELL NOTED AT THIS TIME.