As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED UNCOMMANDED LEFT ENGINE ACCELERATION DURING CLIMBOUT FROM CLT. CREW RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, RESEATED AN UNSEATED PIN ON FUEL CONTROL UNIT TORQUE MOTOR CIRCUIT HARNESS CONNECTOR AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.