Russia’s space agency Roscosmos has replaced the Soyuz capsule it was going to use in the next manned mission to ISS, scheduled for launch in late November, because of “major damage” the capsule experienced during normal pre-flight testing.

[D]uring routine post-production tests at ZEM’s Checkout and Test Facility, KIS, Vehicle No. 759 reportedly suffered major damage to its thermal protection system, which could not be repaired in time for the Expedition 74 launch at the end of 2025. According to one source, quoting an officer within the military certification service, Voennaya Priemka, which traditionally oversees quality control in the Russian rocket and space industry, the ship’s main thermal control heat shield, attached to the base of the Descent Module, was accidentally jettisoned, perhaps by a stray signal triggering the pyrotechnic bolts, connecting the Frisbee-shaped structure to the capsule. According to another source, the thermal layers of the shield peeled off, as a result of botched thermal tests.

That Russia can quickly swap capsules this late in the game speaks well of its Soyuz capsule manufacturing process. It doesn’t just build one or two capsules, it has an assembly line.

That the capsule was damaged during the test however once again raises questions about the overall quality control within the Russian space industry, as well as the reliability of its workforce. It has been building Soyuz capsules now for more than a half century, during which it has steadily implemented upgrades along the way. For there to be “a stray signal triggering the pyrotechnic bolts” during routine testing is disturbing. The circumstances are too similar to the earlier sabotage to both Progress and Soyuz capsules, where the evidence suggested someone on the ground had drilled holes in their hulls prior to launch, then patched them to hide their existence until later while in orbit.

Under Putin the living wages of Russian engineers has suffered. It remains a distinct possibility that there are more than a few malcontents within Roscosmos willing to do such stuff. That Roscosmos investigated the previous sabotage, claimed it identified the cause, but refused to release any information about its conclusions, suggests strongly that this is what what happened in those earlier cases. This new incident in turn raises the possibility now of further sabotage.

It once again is critical that the U.S. get out of its space station partnership with Russia as soon as possible. There are too many known and unknown risks.