The Peregrine lunar lander failed due to a single valve failure in its propulsion system. Engineers have since redesigned the valve for future missions.
Astrobotic CEO John Thornton reported that uncontrolled helium flow caused a significant over-pressurization of the oxidizer tank, which subsequently ruptured.
Engineers identified that the PCV's failure resulted from vibration-induced relaxation in the valve’s threaded components, leading to the mission's ultimate failure.
Despite the oxidizer leak, Astrobotic's team managed to stabilize the Peregrine, charge its batteries, and power its payloads; however, the mission ended in disaster.
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