As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE FUEL VALVE FAILED CLOSED AND NR 4 ENGINE FLAMED OUT AT ALTITUDE 34000. INFLIGHT ENGINE START CHECKLIST DID NOT PRODUCE A RELIGHT. NRT REPLACED NR 4 ENGINE FUEL MANAGEMENT UNIT (FMU). MR73220, S/N F27457 PW IPC REF: 73-21-00-001-030 AIRCRAFT RTS - NO FURTHER PROBLEMS. FMU EN ROUTE TO SFO ON FLT 838-23 WITH EG ALERT TAG.