What was found
MCO - FLT 1430 - ON CLIMB-OUT FROM MCO, EN ROUTE TO DCA, THE NR 1 ENGINE OVERHEAT LIGHT FOR THE 'B' FIRE LOOP ILLUMINATED AND WOULD NOT RESET. THE NR 1 ENGINE 'A' FIRE LOOP WAS ALREADY ON MEL. FLIGHT RETURNED TO FIELD AT MCO AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE INSPECTED THE NR 1 ENGINE FAN AND CORE AREA FOR AIR LEAKS AND DAMAGED FIRE LOOPS. NO DEFECTS NOTED. RAN ENGINE AT TAKEOFF POWER FOR SEVERAL MINUTES. ALL PARAMETERS NORMAL. THE NR 1 ENGINE 'A' FIRE LOOP REMAINS ON MEL.