As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG "ENG VALVE CLOSED" LIGHT REMAIN ILLUMINATED FULL BRIGHT AFTER SHUTDOWN. GROUNDED - YES. COMPLETED B737-9 IFIM TASK 73-06 TASK 804 INTIAL EVAL. STARTED NUMBER 1 ENG AND SHUT DOWN. ENG VALVE CLOSED LIGHT OPERATED CORRECTLY, DETERMINED TO BE INTERMITTENT FAULT.