As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN BOARDING AIRCRAFT NOTICED MUSTY DIRTY SOCK SMELL. PREVIOUS FLIGHT ATTENDANTS ADVISED THEY HAD A FUMES EVENT DURING DESCENT AND LANDING. MAINTENANCE ISOLATED SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)