etudiant.
As I answered to the original poster of that picture, we need to see the adjacent structure to make any claims of any sorts.
This type of damage can occur in many ways. One of the many ways may be that when the plane hit the ocean the forces made the bottom half snap cleanly from the wall structure but the upper part may have been stuck by, well, let's say, an overhead cabin and thus the crumbled upper part. This is just one of MANY explanations for this. Please remember that.