http://www.russianspaceweb.com/meteor-m2-1.html
https://www.nasaspaceflight.com/2017/11/soyuz-2-1b-launch-meteor-m/By November 29, specialists at NPO Lavochkin, which builds Fregat, had already narrowed down the most likely culprit in the failure of the Soyuz launch from Vostochny spaceport, industry sources close to investigation told RussianSpaceWeb.com
Although the information is still preliminary, it is increasingly clear that all the hardware aboard the Fregat upper stage performed as planned. But, almost unbelievably, the flight control system on the Fregat did not have the correct settings for the mission originating from the new launch site in Vostochny, as apposed to routine launches from Baikonur and Plesetsk. As a result, as soon as Fregat and its cargo separated from the third stage of the launch vehicle, its flight control system began commanding a change of orientation of the stack to compensate for what the computer had perceived as a deviation from the correct attitude, which was considerable. As a result, when the Fregat began its first preprogrammed main engine firing, the vehicle was apparently still changing its attitude, which led to a maneuvering in a wrong direction.
At the time, ground control was still receiving telemetry from the mission, but the space tug left the communications range around 7o0 seconds after the liftoff and before the completion of the first maneuver. Apparently, it was not immediately possible to predict the exact trajectory of the stage resulting from the wrong attitude, but it likely led to a suicidal plunge of the stack into the Earth's atmosphere. The available telemetry also allows to establish the exact culprit in the failure, sources said.
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