IIRC a TACA 737 Classic ended up as a glider many years ago after flying into some pretty bad CBs and both engines flamed out due to water ingestion, even with continuous ignition and EAI. Neither engines managed to restart and the plane landed in a ditch. Sullenberger stuff.
The 737-300 was new at the time of its dual flameout, and continuous ignition was not yet required on their CFM-56. The Salvadoran captain, with his left eye gone from a rebel/bandito attack, landed the 737 deadstick on a dike in New Orleans. Boeing flew it off the dike after shedding all possible extra weight.
I met the gentleman several years later when he was capt on TACA 767. He humbly admitted he did not understand the new weather radar, as he had not been adequately trained on it.
This Capt. had a good background in general aviation and deadstick landings. He owned a fleet of cropdusters, which he also used for towing banners.
GB