What was found
BTR - FLT 3280 - DURING CLIMB, CREW REPORTED THE CARGO SMOKE LIGHT CAME ON. CREW FIRED CARGO FIRE BOTTLE AND RETURNED TO BTR. CARGO FIRE EXTINGUISHER SYSTEM WAS PUT ON MEL. INSPECTION OF CARGO BAY SHOWED NO EVIDENCE OF FIRE. AIRCRAFT WAS REPOSITIONED TO DFW WITH NO PASSENGERS. MAINTENANCE REMOVED AND REPLACED FORWARD AND AFT CARGO SMOKE DETECTORS (S/N A3096 & A3387) IAW SAAB MM. OPERATIONAL CHECK WAS GOOD. CARGO FIRE BOTTLE WAS REPLACED AND AIRCRAFT WAS RETURNED TO SERVICE. (M)