Grant,
Here is a link to a youtube video of a certification test on a jet
engine.
http://www.youtube.com/watch?v=Ek6adm4iV4Y&feature=PlayList&p=83D9C67AAE510B4B&playnext=1&index=17
In this case one of the fan blades is destroyed, and you can see the
resulting vibrations. The attach points of these engines to the wings
are incredibly strong. They have to be because they absorbed the
energy developed by the engines and drag the rest of the jet along for
the ride. The engines are designed to stay attached during such a
failure.
Those USAirways pilots were able to slow the jet down enough and
spread out the deceleration forces long enough following their impact
to maximize the survival chances of the folks in their jet. Yet they
kept the jet flying and did not let it stall and fall out of the air
uncontrollably. As a result they were able to save the lives of
everyone on board. And Airbus builds a strong jet. In this case the
engine attach points were able to absorb the tremendous impact forces
of smacking the water at whatever speed they were flying when they
touched down and remain attached to the wings.
Hope that helps.
Respectfully