This import problem is present in at least 4.7.6 and 4.9.0. Never tested 4.8.x
Below: Inside Blender with normals on faces (you can check vertex normals, they look fine as well)
Inside UE4
Wireframe view in UE4, an issue is apparent… face not connected in the top left?
Created with Blender 2.73. Exported as FBX Binary 7.4, 100 scale, X forward, Z up. Mesh was created by creating a plane, scaling it, and subdividing it.
.BLEND filetype is invalid for attachments so I put it and the FBX in a zip file.
[Download me here][4]
PS: I can’t upload a PNG named “ue.png” I don’t know why.