What was found
NR 1 ENGINE FLAMED OUT FL330 IN CRUISE. RESTARTED AFTER PERFORMING ENGINE FAILURE CHECK LIST. BOOST PUMP ON - 2800 LBS NR 1 MAIN TANK. CHECKED NR 1 TANK FOR OBSTRUCTIONS, NO DEFECTS NOTED. CHECKED RIGGING OF NR 1 ENGINE FUEL SHUTOFF VALVE IAW DC8 MM 28-22-7. CHANGED NR 1 FUEL FILTER IAW DC8 MM 73-20-2. CHECKED NR 1 MAIN FUEL TANK INTERMEDIATE VALVE OPERATION OPS, CHECK NORMAL IAW DC8 MM 28-21-10. NR 1 ENG OPS, CHECKS GOOD ON GROUND.