As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE LEFT HAND ENGINE WAS UNRESPONSIVE TO POWER LEVER INPUT AND WOULD NOT COME OUT OF IDLE. MAINTENANCE PERSONAL REMOVED AND REPLACED THE LEFT HAND ENGINE FUEL CONTROL UNIT, PERFORMED RIGGING, OPERATIONAL AND LEAK CHECKS OF THE LEFT HAND ENGINE, ALL SUCCESSFUL. AIRCRAFT WAS RETURNED TO SERVICE.