What was found
THE FLIGHT CREW REPORTED THAT THE ENGINE FIRE WARNING ANNUNCIATOR ILLUMINATED ON CLIMB-OUT WITH CLIMB POWER SETTING ON THE LEFT ENGINE. THE ANNUNCIATOR WENT OUT WHEN THE THROTTLE WAS REDUCED. THE CREW ALSO INDICATED THAT THE ANNUNCIATOR REMAINED OUT THROUGH THE REMAINING FLIGHT. THE MAINTENANCE VENDOR ACCESSED THE LEFT ENGINE FIRE LOOP AND FOUND THE LOOP CLOSE TO THE START VALVE BLEED AIR LINE. THE MX VENDOR REPOSITIONED THE LOOP AS REQUIRED. PERFORMED ENGINE RUNS TO POWER WITH NO LEAKS NOTED AND NO FIRE WARNING ILLUMINATED. THE AIRCRAFT WAS RETURNED TO SERVICE.