As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ODOR EVENT ON DESCENT THROUGH AND INCLUDING ON GROUND WHILE DOORS OPEN IN CMH MUSTY SMELL THROUGHOUT THE FLIGHT DECK AND CABIN. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU AFTER FINDING OIL LEAKING FROM THE APU TURBINE COMPRESSOR DRAIN. **A SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)