What was found
CLT - FLT 668 - ON APPROACH TO CLT, AT 1000 FT AGL, CAPTAIN TRIED TO IDLE BACK ON THROTTLE FROM 80 PERCENT. NR 2 ENGINE WOULD NOT SET BACK AND HUNG AT 80 PERCENT. THERE WAS NO RESPONSE CUTTING BACK THE POWER. AFTER GO AROUND AND HAVING CONTINUED POWER PROBLEM, CAPTAIN SHUT DOWN NR 2 ENGINE. FLIGHT LANDED WITHOUT FURTHER INCIDENT. SINGLE ENGINE TIME, 10 MINUTES. MAINTENANCE REPLACED THE FUEL FLOW REGULATOR. (M)