@vovachan if it had come in slow and nose up, it is unlikey to have broken up ... the TU154 is very solid bit of kit, a slow water landing would have been very survivable, at least a few passengers would have managed to get lifejackets on even if the tail broke off, in front of the rear bulkhead. The fact that no one survived and the authorities insist no one had a life jacket deployed would suggest it either broke up mid air, or entered the water at some reasonably high velocity.