As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PREFLIGHT THE #2 ENG VALVE CLOSED LIGHT WAS ILLUMINATED. BRIGHT BLUE. GROUNDED - YES. REMOVED AND REPLACED #2 ENG HMU REF T/C 1880720. LEAK/OPS CHECKS GOOD. #2 ENG VALVE CLOSED LIGHT NOW OPERATES CORRECTLY. NO FURTHER DEFECTS NOTED. ETOPS GROUND VERIFICATION COMPLIED WITH.