A Tu154 a 727ski ? You obviously never flew in the 2 types !Never try to land a 727 in places the 154 goes to, my friend.
As to the reason of the crash, never listen to the media, even more the Russian media.
The real reasons of the crash, like most of the recent crashs, will probably never be made public, and almost certainly have to do with the current disastrous economic situation many airlines in the CIS are currently.