But he said even such catastrophic failures don't necessarily doom a plane - even if a pilot runs out of runway and must take off.
Official: Plane in Chicago had rare, serious engine failure →
"Planes are meant to fly with one engine," said Walsh, who has also flown Boeing 767s. "We are trained so that we can lose the engine at the worst possible time ... and then still successfully take off and land."
Official: Plane in Chicago had 'uncontained engine failure' →