As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT CHECK FOR FLIGHT 3472 THE BAGGAGE SMOKE DETECTOR DID NOT TEST. NO LIGHT CAME ON THE OVERHEAD PANEL DURING THE TEST. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1 BAGGAGE SMOKE DETECTOR IAW EMB-140 AMM 26-15-01. THE OPERATIONAL CHECK WAS OK. THE AIRCRAFT WAS RETURNED TO SERVICE.