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Second prevalve issue delays completion of SLS Core Stage Green Run campaign – NASASpaceFlight.com – NASASpaceflight.com

A problem with another one of the eight prevalves in the Artemis 1 Core Stage…

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A problem with another one of the eight prevalves in the Artemis 1 Core Stage for NASA’s Space Launch System (SLS) has postponed a second test-firing to wrap up the Green Run campaign. The SLS Program’s first flight article has been installed in the B-2 Test Stand at the Stennis Space Center in southern Mississippi since January 2020.
After a liquid hydrogen prevalve was repaired in November, all the prevalves worked during tanking and firing tests until final preparations for a second Hot-Fire…

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