Overview
- NASA completed a second wet dress rehearsal at Kennedy Space Center, fully loading the SLS with more than 700,000 gallons of cryogenic propellant and executing two terminal countdown runs to the final seconds.
- Hydrogen leak repairs held with concentrations staying well below limits around 1.6%, following replacement of quick‑disconnect seals and a ground‑support filter.
- Teams managed minor issues during the test, shifting to backup systems after a ground communications loss and briefly pausing for a booster avionics voltage anomaly.
- Leaders are reviewing rehearsal data and preparing pad maintenance platforms ahead of a multi‑day Flight Readiness Review late next week before setting a formal launch date.
- The four‑person crew — Reid Wiseman, Victor Glover, Christina Koch and Jeremy Hansen — has begun a two‑week quarantine for a roughly 10‑day free‑return flight around the Moon that would be the first human mission beyond low Earth orbit in over 50 years.