High speed, just under V1 and the thing let go.

But apparently the engine casing supported the entire event. Remember that slow motion video? I guess GE knows how to build an engine to run or when they decide to let go.

I'm not sure why they are saying it was un-contained as nothing pierced the outer casing. The engine casing performed as designed. Now I'm sure some parts went out the back but that isn't a determining factor for contained and un-contained. Some of these Embry-Riddle professors need to hit the design books a bit more.

Either way, crew did a magnificent job.