Today's Artemis I wet dress rehearsal activities concluded after a modified countdown configuration and successfully adding propellant to the rocket. We will review the data and are meeting to discuss next steps. For updates:
The Artemis I wet dress rehearsal ended today at 7:37 p.m. EDT at T-29 seconds in the countdown. Today’s test marked the first time the team fully loaded all the Space Launch System rocket’s propellant tanks and proceeded into the terminal launch countdown, when many critical activities occur in rapid succession.
During propellant loading operations earlier in the day, launch controllers encountered a hydrogen leak in the quick disconnect that attaches anfrom the tail service mast on the mobile launcher to the rocket’s core stage. The team attempted to fix the leak by warming the quick disconnect and then chilling it back down to realign a seal, but their efforts did not fix the issue.
Launch controllers then developed a plan to mask data associated with the leak that would trigger a hold by the ground launch sequencer, or launch computer, in a real launch day scenario, to allow them to get as far into the countdown as possible. The time required to develop the plan required extended hold time during the countdown activities, but they were able to resume with the final 10 minutes of the countdown, called terminal count.
NASA will hold a media teleconference about the test Tuesday, June 21 at 11 a.m., which will stream on the agency’s
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