What was found
DURING CLIMBOUT OF FL340 NR 4 ENG FLAME-OUT. ALL ENG PARAMETERS NORMAL AT TIME OF FLAME-OUT. UNABLE TO RELIGHT AT FL340. DESCENDED FL280 - RELIGHT SUCCESSFUL - ENG PARAMETERS NORMAL - ENG NR 4 FUNCTIONING. PER CFM M/M 71-00-00 CHECKED CHIP DETECTORS ON NR 4 ENGINE, NO DEBRIS FOUND, EXAMINED FUEL FILTER, NO DEBRIS OR WATER FOUND, INLET AND EXHAUST, NO DEFECTS NOTED, N1 ROTATES FREELY, N2 ROTATES FREELY, FUEL.