What was found
THE NR 1 ENGINE FIRE WARNING LIGHT ILLUMINATED WHILE EN ROUTE. THE THROTTLE WAS RETARDED AND THE LIGHT EXTINGUISHED, THE LIGHT CAME BACK ON DURING APPROACH TO CLE. THE NR 1 ENGINE WAS SHUT DOWN AND THE FIRE BOTTLE WAS DISCHARGED AS A PRECAUTIONARY MEASURE. THE AIRCRAFT LANDED WITHOUT INCIDENT. TWO LOOP CONNECTORS ON LOWER A-LOOP OF NR 1 ENGINE WERE FOUND AT FAULT. THE LOOP CONNECTORS WERE REMOVED AND REPLACED. IN ADDITION, THE FIRE DETECTION UNIT AND A AND B LOOP SWITCHES WERE REPLACED AS A PRECAUTIONARY MEASURE. ALSO, THE FIRE BOTTLE WAS REPLACED. THE FIRE DETECTION SYSTEM TESTED NORMALLY.