As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LEFT ENGINE SHUT DOWN IN CRUISE FLIGHT. PILOT RETURNED TO DEPARTURE AIRPORT. MAINTENANCE INSPECTED THE ENGINE INCLUDING FUEL SYSTEM AND IGNITION SYSTEM. RAN ENGINE ON GROUND. ENGINE STARTED AND RAN WITH NO DEFECTS. COULD NOT DUPLICATE ISSUE.