As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, NOTICED THE NR 1 ENGINE VALVE CLOSED, LIGHT ILLUMINATED BRIGHT. ALL ENGINE INDICATIONS ARE NORMAL. AFTER SEVERAL MINUTES THE LIGHT WENT DARK. LIGHT ILLUMINATED AGAIN AT START OF DESCENT AND REMAINED ON THROUGH SHUTDOWN. ACFT GROUNDED.