What was found
DURING NORMAL ENGINE START SEQUENCE, THE NR 2 ENGINE DID NOT ROTATE. VISUAL INSPECTION REVEALED NO OBVIOUS ANOMALIES. NR 1 STARTER/GENERATOR TEMPORARILY SWAPPED TO NR 2. NR 2 ENGINE START ACCOMPLISHED WITHOUT FAULT. NR 1 STARTER/GENERATOR WAS RETURNED TO THE ORIGINAL POSITION AND THE NR 2 STARTER/GENERATOR WAS REPLACED WITH AN OVERHAULED UNIT. NR 2 ENGINE START ACCOMPLISHED WITHOUT FAULT. THE FAILED UNIT WAS ORIGINALLY INSTALLED IN AN OVERHAULED CONDITION AND HAD ACCUMMULATED 487.6 HOURS AND 340 STARTS. DELA (M)