What was found
FWA - FLT NR 4003 - EN ROUTE TO CMH, LEFT ENGINE TORQUE DROPPED 30 PERCENT THEN BEGAN TO DECLINE STEADILY. CREW ELECTED TO DIVERT TO FWA AND PROCEEDED WITH IN FLIGHT SHUTDOWN PROCEDURES WHEN TORQUE REACHED 30 PERCENT. UNEVENTFUL LANDING WAS MADE IN FWA. MAINTENANCE INSPECTED AND FOUND FUEL LEAK AT NR 5 NOZZLE ON THE LEFT ENGINE. NOZZLE TRANSFER TUBE O-RINGS WERE REPLACED AND SATISFACTORY LEAK CHECK ACCOMPLISHED. AIRCRAFT WAS THEN FERRIED TO ORD WHERE ALL LEFT ENGINE FUEL NOZZLES WERE REMOVED AND RI-INSTALLED WITH NEW O-RINGS AS A PRECAUTIONARY PROCEDURE. LEAK CHECKS PERFORMED AND AIRCRAFT RELEASED FOR SERVICE. (M)