As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - INTERMITTENT SMOKE WARNING LIGHT IN FLIGHT. CHECKED BAGGAGE COMPARTMENT NO EVIDENCE OF FIRE OR SMOKE NOTED. ALL OTHER INDICATIONS NORMAL. REPLACED NR 1 SMOKE DETECTOR IN THE BAGGAGE COMPARTMENT. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.