As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED ENGINE SURGES ON CLIMB AT 15000 FEET, TORQUE DROP OF 5%. AIRCRAFT DIVERTED AND THE FADEC WAS REPLACED. THE ENGINE TESTED SERVICEABLE. DURING THE NEXT FLIGHT, THE DEFECT OCCURRED AGAIN. THE FMU WAS REPLACED. A SATISFACTORY TEST FLIGHT WAS CARRIED OUT WITH NO FURTHER DEFECTS. THE AIRCRAFT WAS SUBSEQUENTLY RELEASED FOR SERVICE.