This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Failure of a jet aircraft engine, especially in flight, caused by the extinction of the flame in the combustion chamber.

n. One that fails suddenly, especially after having been successful.

n. The act of flaming out or burning out; extinguishing.

n. The act of quitting or failing, especially due to overwork or in a dramatic manner.

n. The sudden extinguishing of the flame of a burner (due to obstruction of fuel)

"And in that event, I believe it could have definitely been an engine failure, what we call flameout in aviation terms."

flameouts   

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