A design idea...

This afternoon, after telling my grandson about how Captain Sully landed that airplane in a river, I remembered that one of the engines had sheared off at touchdown. That probably explains why the craft floated long enough to get everybody off the wings. Maybe they should engineer a pin in the engine mounts that can be screwed out at the touch of a button, if the pilot is fully committed to a water landing or a wheels-up landing of any kind. The first contact with the landing surface would slide the engines back in their mounting slots until free of the plane. It seems to me that a hot, heavy engine; full of spinning blades and sparks, needs to be as far away from people and fuel-heavy wings as possible.