What was found
DIVERTED TO LAX DUE TO NR 1 ENGINE HIGH OIL TEMPERATURE. SHUTDOWN ENGINE AND LANDED UNDER AMBER ALERT. R & R OIL TEMP BULB AND EIS. SHOP TESTS SHOWED BOTH COMPONENTS WERE WELL WITHIN SHOP TEST SPECIFICATIONS. ALSO, ACCOMPLISHED WIRE CHECK ON THE OIL TEMP BULB CIRCUIT WITH NO FAULTS FOUND. NO ABSOLUTE CAUSE FOUND. POSSIBLE DIRTY CONNECTOR ON THE TEMP BULB CIRCUIT WAS THE CAUSE OF THE PROBLEM. PRIOR TO THE IFSD EVENT ECM SHOWED AND INCREASE OF 10-20 DEGREES IN ECM TREND IN PREVIOUS DAYS FLIGHT (STILL WAY BELOW FLAG LIMITS) . AFTER COMPONENTS WERE REPLACE OIL TEMP NORMALIZED BACK TO WERE IT WAS.