with us now, mary schiavo, cnn aviation analyst.ow an attorney for victims and families in transportation accidents, including those involving boeing. mary, based on what you've seen so far, what stands out to you? are there clues to suggest what may have happened? >> well, i think this thing that stands out to me most of all was a change in the position. at first, there was a comment that it could be an engine, engine failure, et cetera, and then people changed their minds. and i think that probably suggests that what they looked at was the acars data, the data that is suggested by the aircraft itself. it had a normal takeoff, climb out, it had good altitude gain, good ground speed, and all of a sudden it went completely silent and no more data transmission, obviously, that suggests something very catastrophic and probably not an engine failure. >> and it appears as if there wasn't a mayday call? >> that's right. highly significant, as well, because with an engine failure, there are very established and trained for procedures. the