As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER #1 ENGINE START THE AMBER STARTER VALVE OPEN LIGHT REMAINED ILLUMINATED. GROUNDED - YES. MANUALLY CYCLED #1 ENGINE VALVE MULTIPLE TIMES WITH NO DEFECTS NOTED. STARTED #1 ENG REF B737-900 AMM 71-00-00. #1 ENG STARTED NORMALLY. WITH NORMAL CUTOUT AND START VALVE OPEN LITE EXTINGUISHED. OK FOR SERVICE.