What was found
CLT - ON DESCENT INTO CLT, THE NR 2 ENGINE WAS UNRESPONSIVE TO THROTTLE MOVEMENT / WOULD NOT ACCELERATE FROM IDLE THRUST. CREW ACCOMPLISHED ENGINE NO RESPONSE QRH CHECKLIST AND SHUT DOWN THE NR 2 ENGINE. CAPTAIN DECLARED AN EMERGENCY. FLIGHT LANDED NORMALLY AND TAXIED TO THE GATE WITHOUT FURTHER INCIDENT. APPROXIMATE TOTAL SINGLE ENGINE TIME WAS 15 TO 22 MINUTES. MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE MEC. ALSO, REPLACED THE NR 2 ENGINE FUEL PUMP. THRUST RESPONSE NORMAL AT ALL POWER SETTINGS. AIRCRAFT OK FOR SERVICE.