EDT, about 25 minutes after the team recommended "no go" for launch. Launch Director Charlie Blackwell-Thompson called off today's countdown after multiple unsuccessful attempts to stop a hydrogen leak in an 8-inch quick-disconnect fitting at the base of the SLS core stage. But we're going to show up, and we're going to try, and we're going to give it our best." "There's no guarantee we're going to get off (Saturday). "We've got a whole host of things that could cause us to not get off on any given day," mission manager Mike Sarafin told reporters at a Thursday evening news conference.
The SLS rocket - the most powerful booster NASA and its contractors have ever built - has 489 launch commit criteria that have to be met to permit a liftoff. The Space Launch System moon rocket atop pad 39B on Monday morning, August 29, 2022, awaiting blastoff on a mission to send an uncrewed Orion capsule on a 42-day shakedown flight beyond the moon and back. Launch was initially scheduled for Monday morning, but NASA ran into problems during fueling, forcing the agency to scrub just as the launch window was opening. The Saturday launch, however, was canceled due to a hydrogen leak. EDT Saturday, setting the stage for blastoff at 2:17 p.m., the opening of a two-hour window. With a forecast calling for a 60% chance of favorable weather, engineers began fueling the Space Launch System rocket at around 6 a.m. NASA scrubbed its second attempt to launch its Artemis 1 test flight on a long-awaited mission to send an unpiloted Orion crew capsule on a 37-day trip around the moon and back.
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