As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT SHUTDOWN AND AN AIR TURNBACK WITH A LEFT ENGINE OIL ISSUE. CREW REPORTED LEFT OIL TEMP CLIMBED TO 180 DEGREES AND IAW QRH SHUTDOWN THE ENGINE. MAINTENANCE FOUND THE LEFT ENGINE OIL TEMP BULB CONNECTOR LOOSE. THE OIL TEMP RISE WAS ABLE TO BE DUPLICATED BY SHAKING THE CONNECTOR WIRES. THE CONNECTOR WAS REPLACED AND PINS REPLACED. AN ENGINE RUN WAS PERFORMED AND THE AIRCRAFT WAS RETURNED TO SERVICE.