As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SMELL OF WET SOCKS BY MAIN CABIN ENTRY DOOR DURING ALL PHASES OF FLIGHT AS REPORTED BY THE FLIGHT ATTENDANTS. MAINTENANCE FOUND THE APU LEAKING OIL AT THE V BAND SEAL AND REPLACED THE APU PER JOB CARD 26L310449003.