What was found
DURING DESCENT FOR APPROACH FROM 8000-4000 FT., REDUCED THROTTLES TO IDLE NR 1 ENG DID NOT RESPOND APPROPRIATELY. NR 1 ENG PARAMETERS WERE 1.09 EPR, N1 46.8, EGT 450, N2 72.5, FF 2000 PPH. RAN RED TABS FOR LOSS OF THROTTLE CONTROL. ENGINE WOULD ACCELERATE BUT WOULD NOT COME DOWN TO NORMAL IDLE. TAT 19.2. SHUTDOWN ENGINE IAW QRH AND LANDED. REMOVED AND REPLACED APPROACH IDLE SOLENOID VALVE PER B727-200 (JT8D-217C) NR 1 ENG. OPS CHECK GOOD, OK FOR SERVICE.