As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DIRTY SOCK ODOR ON DESCENT APPROXIMATELY 14000' NORMAL PACK CONFIGURATION APU OFF. MAINTENANCE FOUND THE APU LUBE MODULE SCAVENGER FILTER HOUSING LEAKING OIL AND INSTALLED A NEW O-RING PER AMM 49-91-41. A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WAS ACCOMPLISHED PER TASK CARD 26L00021014 AND A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.