As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING FINAL APROACH /LANDING AT 1500 FEET FLIGHT CREW SMELLED ACRID FUMES LIKE WET / MUSTY CLOTHES IN THE FLIGHT DECK, DONNED OXYGEN MASKS AND RAN SMOKE/AVIONICS SMOKE/FUMES CHECKLIST. NO FUMES NOTED IN CABIN. AN EMERGENCY WAS DECALRED AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)