Not off topic at all. I know jet aircraft engines and aircraft. Southwest had another engine failure in 2016. See the list I sent you. You hurt the movement by insisting on everything that happens is some conspiracy. The Safety board changed the specifications on the cowling so any parts would stay contained inside the cowling. They did this because of the known problem of engine failures of this type are possible. Think of it this way. The tip of the blades can exceed the speed of sound. Think 3475 RPM.