What was found
AT TOP OF DESCENT NR 2 ENGINE OIL TEMP BEGAN TO RISE, NR 2 FUEL HEAT VALVE WAS STUCK OPEN. NR 2 ENGINE FUEL HEAT VALVE WAS CYCLED, BUT WOULD NOT CLOSE, OIL TEMP WENT INTO RED 175 DEG, COULD NOT BE DECREASED, OIL PRESSURE NORMAL. DURING NORMAL ATTEMPT TO SHUT NR 2 ENGINE DOWN, INDICATIONS WERE NR 2 ENGINE WAS NOT SHUTTING DOWN. NR 2 ENGINE FIRE HANDLE WAS PULLED. T/S NR 2 ENGINE FUEL HEAT VALVE, VALVE FAILED. REMOVED & REPLACED NR 2 ENGINE FUEL HEAT VALVE, OPS CHECK NORMAL. NR 2 ENGINE MAIN OIL FILTER REMOVED & INSPECTED, NO CONTAMINATION FOUND. ENGINE RUN AND LEAK CHECK WAS ACCOMPLISHED, LEAK CHECK GOOD. ENGINE NR 2 FUEL CUT-OFF LEVER WORKING NORMAL. AIRCRAFT RETURNED TO SERVICE.