What was found
DURING ENGINE START NR 2 ENG VIBRATION WAS OBSERVED WITH 2.5 UNITS OF N2 VIBRATION WITH SPARKS OBSERVED FROM ENG INLET, ENGINE WAS SHUTDOWN. ON RESTART ATTEMPT, LOUD NOISE HEARD W ITH START VALVE OPEN, ONLY 4% N2 ROTATION AND NO FAN ROTATION, ENG AGAIN SHUTDOWN. REPLACED NR 2 ENGINE STARTER AND START VALVE. OPS CHECK NORMAL.