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Faulty valve sent Astrobotic's Peregrine lander straight back to Earth's atmosphere
According to the report [PDF], "the most likely cause of Peregrine's anomaly was the failure of a singular helium pressure control valve, called PCV2, within the propulsion system." However ...
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Why the 1st private lunar lander failed
In short, it seems like Peregrine had a faulty pressure helium control valve. It's called PCV2. According to Astrobotic's ...