Preliminary data based on the notification from the Belgian authorities:
In cruise, the ECU caution warning went on, the engine could not exceed 60 % RPM. All parameters were in “the green”. The engine RPM fluctuated continuously between 30% and 60 %. The ECU B was selected without noticeable change. Fuel transfer was selected. The ECU was reset in flight without success. The pilot declared mayday to EBCI TWR, and landed in EBCI. During taxy out of R25 in S4, the engine stopped. During subsequent engine test, the loss of power was confirmed.