OK, I will use centimeters, even if it is stupid… But when I import my metric model with scale factor 100, it is still unusable with Unreal Editor! Collision objects created in Physical Asset Tool can’t be moved by mouse, because gizmos are much sensitive 
It seems, like fbx importer silently stores some scale, instead of scaling vertices directly. Why???
Unfortunatelly, the model is aircraft with 50 nodes with complex hierarchy, which can’t be re-scaled in 3DS Max easily. And I have more models like that