What was found
CMH - FLIGHT 3135, THE CREW REPORTED A BAGGAGE SMOKE INDICATION DURING DESCENT. THE AIRCRAFT LANDED AT CMH WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE AIRCRAFT, AND PLACED THE BAGGAGE SMOKE INDICATION ON MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. THE AIRCRAFT SUBSEQUENTLY RETURNED TO IAH WHERE MAINTENANCE REMOVED AND REPLACED THE AFT CARGO COMPARTMENT SMOKE DETECTOR, OPERATIONALLY TESTED WITH NO DEFECTS, REMOVED THE MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.