As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF DURING CLIMB, THE CREW ATTEMPTED TO REDUCE TAKEOFF POWER TO CLIMB POWER AND NOTED NO CHANGE IN POWER. THE PILOT COULD NOT REDUCE THE POWER AND THE ACFT CONTINUED TO ACCELERATE. WITHOUT POWER CONTROL AVAILABLE FROM FLIGHT CREW, PILOTS ELECTED TO PERFORM AN IN-FLIGHT SHUTDOWN AND RETURN TO AIRPORT OF ORIGIN. FCU WAS REMOVED AND SENT TO MFG FOR FURTHER INVESTIGATION.