As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABORTED ENGINE START AS AMBER ENGINE INDICATION FLASHED START VALVE OPEN LIGHT REMAINED ON. GROUNDED - YES. MANUALLY CYCLED #1 ENG START VALVE NO DEFECTS NOTED. PERFORMED NORMAL ENGINE START. ALL INDICATIONS NORMAL OK FOR SERVICE. REF B737-900 AMM 71-00-00-800-808-F00.