As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 390 - EN ROUTE ORD-LGA, UPON SWITCHING THE LEFT ENGINE HEAT OFF, THE LEFT ENGINE SHUT DOWN. ENGINE IGNITION WAS IN CONTINUOUS AT THE TIME. LEFT FUEL TEMPERATURE FLUCTUATING ON RETURN TO ORD. LANDED ORD WITHOUT INCIDENT. REPLACED LEFT ENGINE FUEL PUMP, FUEL CONTROL AND FUEL TEMPERATURE BULB. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)