What was found
ORD - FLT 4033 - THROUGH 13,000 FEET, LEFT ENGINE FLAMED OUT. TRIED TO RESTART, BUT AT LIGHT OFF, THE RAM AIR ADVISORY LIGHT CAME ON. DISCONTINUED START. REMOVED AND REPLACED FADEC 1A AND FADEC 1B. OPERATIONAL CHECKED WITH NO FURTHER DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE. (M)