Boeing, CFM and Ukraine Air will be quite anxious to fix anything wrong with the engine or aircraft. Ukraine has access to the crash site and most evidence and I am confident they will share that with the manufacturers in the interest of flight safety. The lack of such evidence may be food for all kinds of political discussion.
Give it a week
PS
That was one hell of an inflight fire to take out the broad leading edges of the wing, Not seen one that severe in commercial service