What was found
IN CRUISE AT 17,000 FT NR 4 ENGINE FLAMED OUT, 7,000 LBS INDICATED ON FUEL GAUGE. ALL CROSSFEEDS CLOSED. ENGINE RE-LIT AFTER COMPLETION OF CFM56 FLAMEOUT/INFLIGHT RESTART CHECK LIST. AN INSPECTION IS ON GOING. AS THE INFORMATION BECOMES AVAILABLE IT WILL BE PROVIDED. MAINTENANCE PERFORMED TROUBLESHOOTING PER CFM MM 71-00-00 FAULT 51 LEAD TO MEC CHANGE. MAINTENANCE REMOVED AND REPLACED MEC PER CFM 73-21-10. OPERATIONAL AND CHECK LEAK GOOD IN ACCORDANCE WITH ALL APPLICABLE MANUALS. ALL ENGINE PARAMETERS NORMAL. AIRCRAFT WAS RETURNED TO SERVICE.