What was found
(CAN) DURING REFUELING OPERATION, NO.1 ENGINE ITT INCREASED UP TO 790 C AT WHICH THE PILOT REDUCED THE ENGINE TO IDLE POSITION AND THEN ENGINE ITT DROPPED TO 650 C. AFTER FEW SECONDS AGAIN ITT BEGAN TO INCREASE BEYOND 900 C AND CREW DECIDED TO SHUTDOWN THE ENGINE FOR TROUBLESHOOTING. AS ITT READING WAS SHOWING OUT-OF-RANGE AND T5 FAULT WAS PRESENT, (TC# 20190315005)