The helium system on the SLS upper stage—officially known as the Interim Cryogenic Propulsion Stage (ICPS)—performed well during both of the Artemis II countdown rehearsals. “Last evening, the team was unable to get helium flow through the vehicle. This occurred during a routine operation to repressurize the system,” Isaacman wrote.
The Space Launch System rocket emerges from the Vehicle Assembly Building to begin the rollout to Launch Pad 39B last month.
Credit: Stephen Clark/Ars Technica
The Space Launch System rocket emerges from the Vehicle Assembly Building to begin the rollout to Launch Pad
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