As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT AND ENROUTE, THE CREW REPORTED THAT THE LEFT HAND ENGINE LOST 30 PERCENT TORQUE AND THE AIRCRAFT YAWED BOTH TIMES. THE AIRCRAFT WAS THEN FERRIED TO PIT. MAINTENANCE INSPECTED AND ADJUSTED BLADE ANGLES, RETRIMMED THE ENGINES, SWAPPED ECU'S AND REPLACED THE HYDROMECHANICAL UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 71-00-00. GROUND RUNS AND THEN A OPERATIONAL CHECK FLIGHT WAS PERFORMED WITH NO DEFECTS NOTED. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.