CNN CNNI Simulcast December 31, 2014 08:18:00
>> even though the plane's flight recorders have not yet been recovered, there are a lot of theories out there. cnn spoke with an aviation expert about what might have gone wrong. >> reporter: when an airplane flips or stalls it could be catastrophic. >> once are you in unrecoverable stall, what happens? >> there are various types of stalls. for the most part you are going to see more or less a flat situation. because the pilots will try to control it. it will just it will almost be like a leaf. >> how is that possible? >> well it's possible because they got to is up a slow air speed. >> repor...