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 DURING CRUISE THROUGH TO LANDING AND TAXI-IN AT DFW. POSSIBLE FUMES REPORTED BY FLIGHT ATTENDANT. ALSO DETECTED IN COCKPIT ON SHORT FINAL APPROACH. FOUND APU TO BE SOURCE OF ODOR. REPLACED APU ON JC 26L31049003.