Overview
- Overnight checks showed an interruption in helium flow to the SLS upper stage, a pressurization and purge function critical for flight.
- NASA Administrator Jared Isaacman said the rocket will roll back to the Vehicle Assembly Building, removing the March launch window from consideration.
- Pending troubleshooting and repairs, the next available opportunities open in early April, with dates identified as April 1, 3, 4, 5, and 6.
- The setback follows a clean second wet dress rehearsal that resolved a prior hydrogen leak and ran the countdown to T‑29 seconds.
- Astronauts Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen had entered preflight quarantine for a March 6 target and will now await a new schedule.