What was found
ENGINE NR 2, ON DESCENT THROUGH 15,000 FT ENGINE STARTED TO VIBRATE, N1 AND N2 BEGAN FLUCTUATION, EGT STARTED UP THEN 650 DEGREE ENGINE WAS SHUT DOWN THEN WIND MILLED FOR 14 MINUTES WITH 5 PSI OIL PRESSURE. REMOVED AND REPLACED NR 2 ENGINE PER KIWI FORM M72A, AND B727 MM 71-00.