What was found
IAH - FLIGHT 2380, THE CREW REPORTED A BAGGAGE SMOKE INDICATION DURING CLIMB. BOTH BAGGAGE FIRE EXTINGUISHERS WERE DISCHARGED IN ACCORDANCE WITH THE QRH, AND THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT WITH NO DEFECTS NOTED. MAINTENANCE REMOVED AND REPLACED THE BAGGAGE FAN RELAY, SMOKE TEST RELAY, THE FORWARD AND AFT SMOKE DETECTORS AS A PRECAUTION, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.