Orion Helium Valve Leak Prompts Redesign Ahead of Artemis IV
Artemis II has a small internal helium leak in Orion’s service-module valves, but it does not threaten reentry; the leaky valves will be discarded with the service module and NASA will study the leak to guide a redesign of the valve system for future flights, notably Artemis IV. Artemis III remains on track for 2027 (in Earth orbit) and Artemis IV for 2028, with a redesigned helium valve system expected to be ready; heat shield work is progressing as Artemis II proceeds.