This is why we test. We ended today’s NASAArtemis “wet dress rehearsal” after encountering a vent valve issue while loading propellant into the NASA_SLS fuel tank. We're investigating, & plan to host a media teleconference Apr. 5 at 4pm ET (20:00 UTC):
The Artemis I team has ended today’s attempt at thetest at 5 p.m. The countdown ended after partially loading liquid oxygen into the Space Launch System core stage tank. This provided the teams a valuable opportunity for training and to make sure modeled loading procedures were accurate. This was the first time using new systems at NASA’s Kennedy Space Center Launch Complex 39B.
During chilldown of the lines in preparation for loading the liquid hydrogen, the teams encountered an issue with a panel on the mobile launcher that controls the core stage vent valve. The purpose of the vent valve is to relieve pressure from the core stage during tanking. Given the time to resolve the issue as teams were nearing the end of their shifts, the launch director made the call to stop the test for the day.
The wet dress rehearsal is the last major test before launch. This test allows the team to practice propellant loading and thoroughly check out the Artemis I rocket systems as they are exposed to cryogenics.
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