As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMF - LEFT ENGINE UNCOMMANDED INCREASE IN TORQUE FROM 40 PERCENT TO 100 PERCENT IN-FLIGHT. TORQUE REDUCED TO 30 PERCENT WITH PROPELLER BROUGHT TO FLIGHT IDLE POSITION. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED LEFT ENGINE FUEL CONTROL UNIT. LEFT ENGINE OPERATIONAL CHECK NORMAL DURING GROUND RUN. AIRCRAFT RETURNED TO SERVICE. (X)