What was found
AT LT ENG OIL TEMP STARTED TO CLIMB RAPIDLY TO 249C. NEVER RECEIVED MASTER WARNING OR CAUTION, ONLY RED TEMPERATURE ON EICAS, FOLLOWED QRH & SHUTDOWN LT ENGINE, ENROUTE, ACFT DIVERTED DUE TO MAINTENANCE EMERGENCY ACTIONS. R & R OIL LEVEL/TEMP SENSOR IAW AMM 79-31-01. ACFT RAN AT CLIMB SETTING FOR 20 MIN ALL, CKS GOOD AT THIS TIME.