What was found
IAD INFLIGHT T1507/05JAN DEC TO DFW - DURING CLIMB, THE LEFT FUEL TEMPERATURE ROSE AT 120 DEGREES THE OIL TEMPERATURE ROSE TO 150 DEGREES AND WAS IN THE YELLOW BAND FOR APPROXIMATELY 10 MINUTES. PULLED LEFT FUEL HEAT TIMER K29. OIL TEMPERATURE WENT BELOW THE YELLOW ARC AND FUEL TEMPERATURE DROPPED SLIGHTLY DURING DESCENT. LANDED IAD WITHOUT INCIDENT. REPLACED LEFT ENGINE FUEL HEAT VALVE AND INSPECTED TEMPERATURE TABS. SYSTEM GROUND CHECKED NORMAL OPERATION.