While inside the Vehicle Assembly Building (VAB), teams completed several major objectives, including assessing the liquid hydrogen system leak at the tail service mast umbilical, replacing the interim cryogenic propulsion stage (ICPS) gaseous helium system check valve and support hardware, and modifying the ICPS umbilical purge boots. The addition of hazardous gas detectors above the upper stage allows for additional visibility into any potential leaks during cryogenic operations.
The hatches, or access points, of the crew module and launch abort system are now closed in preparation for rollout. Engineers installed rain gutters on the crew access area to help prevent moisture from entering the crew module while the spacecraft and rocket are at the launch pad. Teams have started retracting the service platforms that surround the Moon rocket and spacecraft in the VAB for rollout configuration ahead of their return to the launch pad.
NASA will provide livestream views the rollout of the SLS rocket and Orion spacecraft from VAB and arrival at launch 39B. For more information about the launch availability, click here.