Artemis II Countdown Hiccup Prompts Seal Upgrades Ahead of Next Rehearsal
NASA is fixing a hydrogen-fuel leak on the Space Launch System before the Artemis II countdown rehearsal, after a confidence test showed reduced fuel flow and a filter replacement is planned. The safety limit for hydrogen concentrations, raised to 16% from 4% since Artemis I, remains in effect based on test data. Artemis III will seek cryoproofing and redesigned propellant-loading interfaces; if Artemis II misses March, additional launch opportunities exist in April and May.