1: Another aviation analyst , David Soucie , said the quickness of the descent shows something went wrong , but also that the plane was not out of control . 2: O'Brien pointed out the known details of the crash -- a rapid descent , no radio call and a flight that continues into the mountains -- are not part of a  typical emergency scenario .  3: CNN aviation analyst says this is not a typical emergency incident , but all possibilities are part of probe .
1: aviation analyst 2: O'Brien 3: CNN aviation analyst