As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: IN CABIN ALL SECTIONS DIRTY SOCK, MUSTY SMELL REPORTED DURING CRUISE AND WAS WORSE DURING DESCENT. MAINTENANCE FOUND THE APU COMPARTMENT WAS SATURATED WITH OIL AND CLEANED IT AS REQUIRED. MAINTENANCE ACCOMPLISHED A OPERATIONAL / LEAK CHECK ALONG WITH THE DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WITH NO LEAKS OR ODORS NOTED.