What was found
JUST PRIOR TO BEGINNING APPROACH TO DUKE. #2 ECU MAINTENANCE CAUTION LIGHT ILLUMINATED. AS PIC REDUCED POWER TO BEGIN LANDING APPROACH, #2 FMU (FUEL CONTROL) FAIL LIGHT ILLUMINATED. #2 ENGINE DROPPED TO 11% TORQUE. PIC TRANSITIONED TO SINGLE ENGINE GO-AROUND PROFILE. ONCE CLIMB WAS ESTABLISHED, PIC SWITCHED #2 ENGINE TO MANUAL CONTROL AND TRIED TO REGAIN CONTOLR OF ENGINE WITH MANUAL TRIM SWITCH. NO ENGINE RESPONSE. PIC DECLARED AN EMERGENCY WITH RDU TOWER AND MADE A SINGLE ENGINE LANDING AT RDU. TURBOMECA FOUND THE FMU STEPPER MOTOR FAILED. THE FMU WAS REPLACED WITH SERVICEABLE FMU P/N 031985290 S/N 119B.LEAK CHECK C/W ANDD POWER CHECKS. NO DEFECTS NOTED. A/C IS FROM OUR DUKE LIFE FLIGHT PROGRAM IN NORTH CAROL