What was found
JFK/MXP - INFLIGHT ENGINE SHUTDOWN. NR 1 ENGINE N1 EXCEEDANCE DURING DESCENT PROFILER WHILE A/T ENGATED AND THROTTLES MOVING FORWARD. N1 136.9 PERCENT FOR 11 SECONDS. EGT 666, N2 92.4, F/F 3218. NR 1 ENGINE SHUTDOWN IAW FHB. PERFORMED ENGINE OVERSPEED INSPECTION IAW 72-00-00 PAGE 680. NIL FOUND. SUSPECTED BAD N1 TRANSMITTER. REMOVED AND REPLACED NR 1 ENGINE N1 FAN SPEED SENSOR IAW 77-12-01-401. OPERATED NR 1 ENGINE MAX POWER ASSURANCE TEST 4. ALL FIGURES WITHIN LIMITS. N1 INDICATION NORMAL IAW 71-00-00. (M)