What was found
(CAN) ON SHORT FINAL APPROACH, FADEC FAIL WARNING LIGHT AND POWER LOSS. PILOT FORCED TO COMPLETE LANDING UNDER LOW POWER AND LOW ROTOR RPM RESULTING IN A HARD LANDING. ATTEMPTS TO DOWNLOAD FADEC ECU DATA TO MAINTENANCE TERMINAL UNSUCCESSFUL WITH NO ECU IS AVAILABLE ERROR. EXCHANGE OF THE ECU WITH A SERVICEABLE ONE FROM ANOTHER AC PROVED THE FAULT IS IN THE ECU. ECU HAS BEEN SHIPPED TO CHANDLER EVANS FOR INVESTIGATION.