Technology & Science
Helium Fault Forces Artemis II Rollback, Scrubs March 6 Moon Fly-by
On 21 Feb 2026 NASA scrubbed the March 6 Artemis II launch window after a blocked helium line in the SLS upper stage required rolling the 98-m rocket back to the Vehicle Assembly Building, pushing the first crewed lunar flight since 1972 into April at the earliest.
Focusing Facts
- NASA Administrator Jared Isaacman announced via X on 21 Feb 2026 that the helium flow failure in the Interim Cryogenic Propulsion Stage means March opportunities are "out of consideration."
- Accessing the suspect filter/valve requires a full rollback of the 322-ft Space Launch System to the VAB, a process that typically takes 4–5 days and was last done for Artemis I in September 2022.
- NASA lists April 1, 3–6 2026 as the next viable launch dates that satisfy Artemis II trajectory lighting constraints.
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