As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT NUMBER 2122, MASTER WARNING/SMOKE LIGHTS ILLUMINATED. BLINKS ON ABOUT EVERY 3 SECONDS LAST 10 MINUTES OF FLIGHT WITH NO ASSOCIATED INDICATION OF FIRE/SMOKE. PERFORMED OPERATIONAL CHECK OF BAGGAGE COMPARTMENT SMOKE DETECTORS, BOTH 1 AND 2 OPERATIONAL CHECKED GOOD. NO DEFECTS FOUND. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.