As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 "ENGINE VALVE CLOSED" LIGHT ILLUMINATED BRIGHT BLUE IN FLIGHT. LIGHT WENT OUT 160NM FROM OAKLAND AIRPORT ETOPS FLIGHT. LIGHT ILLUMINATED AGAIN AFTER LANDING & PUTTING APU ON BUSS. ACFT GROUNDED. R & R HPSOV SWITCH IN NR 2 HMU REF AMM 73-21-09-000, 400-801-F00. OPS CHECK NORMAL. AMM 71-00-00-800-811-F00, TESTS GOOD.