As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE FLAMED OUT AT FL370 WITH IGNITION OFF AND CONDITIONS CALM. RESTART AT FL290 OK. NO FURTHER PROBLEMS. MAINTENANCE INSPECTED INLET AND EXHAUST, FOUND OK. FUEL FILTER WAS CLEAN. REPLACED THE TT2 SENSOR, HIGH POWER RUN CHECKED NORMAL. SPECIFIC PART CAUSING PROBLEM TO BE DETERMINED.