As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2287 - ON FINAL APPROACH, AT 2000 FEET, THE MASTER WARNING/SMOKE ALARM SOUNDED. NO FUMES OR ODORS WERE DETECTED. MAINTENANCE INSPECTED BOTH BAG BAY SMOKE DETECTORS FOR LOOSE CONNECTORS, CHAFED WIRES AND ANY OBVIOUS DEFECTS, NONE WERE NOTED. BOTH DETECTORS WERE CLEANED AND OPERATIONAL CHECKS WERE PERFORMED. THE CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.