What was found
IAH - FLIGHT 2556, DURING TAKEOFF THE CREW REPORTED A BAGGAGE SMOKE WARNING. THE FIRE EXTINGUISHERS WERE DISCHARGED AS A PRECAUTION, AND THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSECTED THE AIRCRAFT, AND REMOVED AND REPLACED THE NR 1 CARGO SMOKE DETECTOR, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERCVICE.