What was found
CREW RECEIVED A NR 2 ENGINE CONTROL FAULT MESSAGE DURING DESCENT. DECLARED AN EMERGENCY. ENGINE PULL BACK TO IDLE FOR LANDING. LANDED SAFELY AND TAXIIED OFF RUNWAY. NR 2 ENGINE CONTROL FAULT EICAS MESSAGE DURING LANDING AT IDLE THRUST. REMOVED THE SLAVE CVG ACTUATOR IAW AMM 75-31-03 AND LMM 75-00-00-800-806. INSTALLED A NEW SLAVE ACTUATOR IAW LMM 75-00-00-800-806. NR 2 ENGINE CONTROL FAULT WAS FOUND TO BE DUE TO ATTACHING HARDWARE FOR SLAVE VG ACTUATOR MISSING. R & R THE ACTUATOR, AND NEW HARDWARE. OPS & LEAK CHECKED GOOD IAW LMM 72-00-00. ACFT OK FOR SERVICE.