As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2002 - WHILE ON APPROACH, THE CREW RECEIVED A SMOKE WARNING. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE NR 2 SMOKE DETECTOR. OPERATIONAL CHECKS WERE PERFORMED AND CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.