What was found
CREW REPORTED LT FADEC FAULT 2 WHITE STATUS MESSAGE. CREW FOLLOWED QRH. SHORTLY THEREAFTER, MESSAGE DISAPPEARED AND LT FADEC AMBER MESSAGE APPEARED. AFTER BEING UNABLE TO MAINTAIN ALTITUDE DUE TO DECREASING AIRSPEED, CREW DECLARED AN EMERGENCY AND LANDED AT NEAREST SUITABLE AIRPORT, WHICH WAS ALSO SCHEDULED DESTINATION. MAINTENANCE TROUBLESHOT, R & R LT ENGINE FADEC, FULL AUTHORITY DIGITAL ENGINE CONTROL, AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.