What was found
SHIP 5650 -ATB/IFSD- DURING CLIMB OUT AT APPROXIMATELY 17,000FT THE LEFT ENGINE THROTTLE BECAME UNRESPONSIVE. CREW PERFORMED AIR TURN BACK TO MSP. FLIGHT CREW SHUT DOWN THE ENGINE PER QRH. CORRECTIVE ACTION: EEC AND FCU REPLACED, WIRING CHECKS PERFORMED. FOUND P/S TLR FB INT MESSAGE DURING CHECKOUTS. VERIFIED SHORT INTERNAL TO THRUST LEVER RESOLVER. RESOLVER REPLACED AND MESSAGES CLEARED. SYSTEM CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.