A new released video shows how a Boeing 737 of Tatarsan Airlines crashed Sunday night in a near-vertical position after a second attempt of landing in Kazan, Russia.

According to John Cox, an aviation safety consultant who flew 737s for 15 years for US Airways, "anytime you have an airplane that gets this vertical, the immediate suspicion is that it stalled".

The crash killed 50 people onboard after the airplane tried a second ans suspicious attempt at a landing in good weather raising questions on whether it was a pilot error or a system failure.

The plane's black boxes were retrieved but investigators said they were damaged obstructing authorities attempt to look into plane's flight records and crew conversations.

According to investigators, the plane was built 23 years ago and used by seven other carriers being damaged in 2001, when it tried to land in Brazil injuring no one.