>> taiwanese investigators say one engine was out when the captain mistakenly turned off the other engine, the one working engine, and that was just eight seconds before the crash. so we have a lot to look into here. let's talk more about this with aviation analyst mary schiavo. we were talking about this this morning when we saw this. you feared this was the case back in february, that he had possibly turned off the wrong engine. we now know that is actually the case. how does that happen? >> well, we feared that and i thought that might be the case because this is not the first crash that was caused by that. there have been at least a dozen others and it really comes down to training and the report also cites the inadequate training or at least this particular person was not grasping the training. it's very important when you have one engine out on a twin engine plane to ascertain which