The normals seem to be inverted (if you position the unity camera inside the cockpit it should invert the effect, the invisible part becomes visible and vice versa). I don't know how you made this mirrored part, but to fix it you can just collapse the whole thing and manually flip the normals of the side that is wrong.
In the future check your workflow, there's probably better ways to mirror an object. I personally like to use the symmetry modifier.
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