Inside the VAB, work platforms were raised around the upper stage so specialists could reach valves and plumbing in the helium circuit. Engineers replaced suspect components, swapped batteries in several critical systems and then repeated their tests to confirm the fault had been cleared.
After reviewing the data, Nasa managers signed off on a second rollout and the next phase of checks, which take place at the pad. If those tests are completed without incident, Artemis II will become the first crewed mission in the programme, paving the way for another crewed test flight, Artemis III in Earth orbit, sceduled for 2027 ahead of Artemis IV in planned for 2028, which will aims to see astronauts set foot on the Moon..
For the first launch opportunity for Artemis 2, Nasa is targeting 18:24 Eastern Daylight Time on 1 April, which is 23:24 in the UK. If that attempt is delayed, further launch windows currently run on 2, 3, 4, 5 and 6 April. If those are missed then there is a final opportunity in April on the 30th.