As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR SMELLED THROUGH 18K ON DESCENT. DESCRIPTION OF ODOR/FUME: TEMPORARY, DIRTY SOCKS/MUSTRY DRY SMELL. APPARENT CABIN SOURCE: UNKNOWN. FLIGHT DECK AND FWD CABIN. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-PERFORMED CHRONIC ODOR EVENT TROUBLESHOOTING AND CLEANING PER TASKCARD TI 2100-2004. REF L/P 3559279-2