As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PREVIOUS FLIGHT ATTENDANTS NOTICED FUMES ON THE DESCENT AND AIRCRAFT WAS REFUSED DUE OT ACRID SMELL. **ORIGINAL REPORT WAS AALA202410078957** MAINTENANCE FOUND THE APU COOLING FAN COVERED IN OIL AND REPLACED THE COOLING FAN O-RING / PACKING ALONG WITH THE COOLING FAN TRANSFER TUBE O-RINGS / PACKINGS PER AMM 49-52-51. (AALA202410157028). A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.