The launch of the Soyuz-2.1a launch vehicle with the Soyuz MS-25 manned spacecraft was canceled automatically 20 seconds before launch

The launch of the Soyuz-2.1a launch vehicle with the Soyuz MS-25 manned spacecraft was canceled automatically 20 seconds before launch

On March 21, 2024, Roscosmos reported that the launch of the Soyuz-2.1a launch vehicle, which was supposed to launch the Soyuz MS-25 manned spacecraft into orbit, was automatically canceled 20 seconds before launch.

“At the final stage of pre-launch preparation, an extraordinary situation occurred, and the entire procedure was interrupted. The reason was found. At the moment, we just found out at a meeting of the state commission that the cause was a drop in the voltage of the chemical current source,” said the head of Roscosmos Yuriy Borisov. He added that the launch of the Soyuz MS-25 spacecraft was postponed to March 23.

The main crew of the Soyuz MS-25 spacecraft included Russian Oleg Novytskyi, Belarusian Marina Vasilevska and American Tracy Dyson.

Borisov said that the crew is being evacuated from the ship, after which the launch complex will be returned to its original position, then the state commission will conduct a detailed analysis of the reasons for canceling the launch procedure.

Roscosmos Executive Director of Manned Space Programs Serhiy Krikalyov told the media that the automatic systems that control the launch worked well.
“Automation during launch control worked and prevented the ship’s systems from malfunctioning. The crew is safe, they left the rocket and went to take off their spacesuits,” Serhiy Krykalev said. After removing the spacesuits, a medical examination of the crew members will be conducted, then the cosmonauts will return to quarantine, and further preparations for the launch will be continued.

The incident with the cancellation of the launch of a manned ship immediately before the start happened for the first time in the history of domestic cosmonautics. Cosmonautics historian Oleksandr Zheleznyakov told the media about this. “In the history of domestic cosmonautics, launches of manned ships have not been canceled just before the start command.” There were other excesses, but there were no such incidents. It happened with unmanned ones, but not with manned ones,” explained Zheleznyakov.

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