This is the first official version of the space agency.
The cause of the Soyuz FG missile crash on October 11 was the abnormal operation of the sensor signaling the separation of the first and second stages of the carrier, said Sergey Krikalev , executive director of Roskosmos for manned programs. This is the first official version of the space agency.
The accident occurred due to abnormal separation of the first and second stages. One of the “sides” during the separation did not retreat to the desired distance and hit the second stage fuel tank, which led to the rupture of the tank and the destruction of the first stage. The reason for this, that the commission found, was the abnormal operation of the sensor, which signals the divergence of the first and second stages.
During the investigation, Roskosmos already admitted that the separation of the first and second stages of the launch vehicle had a failure in transmitting the signal over the cable. The media reported that the cause of the accident were errors during the assembly of the rocket.
Kommersant: the main version of the accident with the Soyuz rocket – an error during assembly
Roskosmos has not yet prepared a report on the causes of the incident.
According to experts, during the docking of the side blocks to the second stage of the rocket in the assembly and test case at the Baikonur cosmodrome made mechanical problems.
Apparently, the damage was caused during the lifting of the side unit with a crane. This is not a design error and not a factory defect. Rather, we are talking about operational errors.
Roscosmos reported that they would prepare a report on the causes of the incident by the end of this week, that is, until October 21.
October 11 during start-up rocket “Soyuz-FG” in the second minute flight there was astrike on the first stage of the second. The crew after the accident the carrier landed successfully in the steppes of Kazakhstan.
On October 11, Soyuz-FG launched from Baikonur with the Soyuz MS-10 spacecraft, on board of which was the crew of the ISS. At the 119th second of the flight there was an accident. Russian cosmonaut Alexei Ovchinin and American astronaut Nick Haig evacuated and landed in Kazakhstan.