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 DECLARED AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT FOR AALA202210253870: MAINTENANCE CLEANED THE APU INLET PER TASK CARD 26T31049006, CLEANED THE APU LOAD COMPRESSOR PER TASK CARD 26L31049009 AND CLEANED THE APU COMPARTMENT PER AMM 49-00-00-100-003-A. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS BEING NOTED. ** (CLOSED)