Posted: Fri, Feb 26, 2021, 10:01 AM ET (1501 GMT)
NASA announced Monday it is postponing a second static-fire test of the Space Launch System core stage that had been scheduled for this week. The agency said in a statement that engineers discovered a problem with a valve used to control the flow of liquid oxygen into the stage's four RS-25 engines. NASA and Boeing will work to correct the problem, but did not set a new date for the test. NASA had planned to perform the static-fire test Thursday, running the engines for up to eight minutes before shipping the stage to the Kennedy Space Center to be used on the Artemis 1 mission.

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