SLS Rolled Back to VAB for Helium Supply Line Blockage

NASA's crawler-transporter 2 returned the fully stacked Artemis II SLS/Orion to the Vehicle Assembly Building to troubleshoot a blockage in the helium supply line to the ICPS (Interim Cryogenic Propulsion Stage) upper stage. The rollback effectively ruled out any March launch windows. A new fueling test was planned upon the vehicle's return to the pad, with an April or later target for launch.