What was found
(CAN) DURING ENGINE GROUND RUN, IT WAS FOUND THAT THE RT ENGINE WOULD NOT MEET OIL OPERATING TEMPERATURE. MAINTENANCE FOUND THAT THE RT ENGINE OIL TEMP CONTROL VALVE SPRING RETAINING NUT WAS SHEARED OFF AND WAS FOUND IN OIL COOLER SUPPLY HOSE. THE VERNATHERM, ENGINE OIL, AND FILTER WERE CHANGED. THE OIL COOLER WAS INSPECTED, FLUSHED AND CLEANED.