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Is it possible to take a CFM56-3C engine and modify it to a CFM56-3B1 engine? I own a CFM56-3C engine but my customer would like to install a CFM56-3B1 engine on his plane. Can this be done?

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  • $\begingroup$ A good subquestion would be : how common are those engines? If there are too many parts that differ, it may be hard (technically and legally) to convert one into the other. $\endgroup$
    – Manu H
    Commented Dec 19, 2019 at 6:07
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    $\begingroup$ This question raises so many other questions... $\endgroup$
    – FreeMan
    Commented Dec 19, 2019 at 12:29

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In theory, I think that should be possible, as the -3B is a lower thrust rating than the -3C (going to higher thrust rating would be harder). However, you would have to ask CFM. I think they are the only ones that could answer.

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