Overview
- The wet dress rehearsal ended at T-5:15 when sensors flagged a liquid hydrogen leak at the tail service mast umbilical on the SLS core stage.
- NASA is reviewing test data and will fix the leak source, then repeat the rehearsal before committing to March launch opportunities.
- A NASA document highlights possible March windows on March 6–9 and March 11, with April dates available if needed.
- The four astronauts—Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen—were released from quarantine until about two weeks before the next attempt.
- The schedule shift opens a near-term launch opportunity for SpaceX’s Crew-12 mission to the ISS, with NASA working toward an early window this month.