There are several recorded incidents of CFM56 engines flaming out in heavy rain and/or hail conditions , beginning early in the CFM56 's career . In 1987 , a double flameout occurred in hail conditions ( the pilots managed to relight the engines ) , followed by the TACA Flight 110 incident in 1988 . Both CFM56 engines on the TACA 737 flamed out while passing through hail and heavy rain , and the crew was forced to land without engines on a grassy levee near New Orleans , Louisiana . CFMI modified the engines by adding a sensor to force the combustor to continuously ignite under these conditions
TACA Flight 110
TACA Flight 110
CFM International CFM56