There seems to be a bug in 4.14 when importing an FBX with an animation.
The same FBX file imports just fine in 4.13.2
I’ve attached the FBX here, which is a dead simple cube with rotation keyframes baked across 200 frames.
I have tried exporting from Cinema 4D and from 3ds max and with FBX version 7.4 and 6.1. UE 4.14 crashes every single time on import.
If I import the same file as a static mesh, it will import fine, without the animation.