What was found
#1 ENG WOULD NOT START, NO N1, START VALVE OPEN LIGHT ILLUM. NOTICED A 10PSI RISE IN DUCT PRESSURE, ETA DISPLAYED, BUT NO SPIN. GROUNDED - YES. REMOVED #1 STARTER REF B737-900 AMM 80-11-01-000-801-F00. INSTALLED NEW #1 STARTER REF AMM 80-11-01-400-F801-F00.