What was found
NR 4 ENGINE FLAMED OUT AT FL360, ENGINE FAILURE CHECK LIST PERFORMED IN FLIGHT. ENGINE START PROCEDURE SUCCESS AT FL 300. ALL ENGINE INDICATIONS NORMAL. T/S NR 4 ENG PER REF MM 7100/ ENG FLAME-OUT, T/S PROCEDURES, INSPECTED FUEL FILTER, MAGNETIC CHIP DETECTOR, CIT, SENSOR, VSV, NO DEFECTS NOTED. DRAINED FUEL SUMP. FOUND EVIDENCE OF MOISTURE. ALSO SUMPED MAIN FUEL TANKS AND ALT TANKS. PERFORMED ENG RUN IAW JRH MANUAL CHAP 13.1.