NASA Repairs Artemis 2 Rocket, Continues Eyeing April Moon Launch

Source: Slashdot

Artemis II Launch Update

NASA is targeting an April launch window for the upcoming Artemis II mission after repairing a helium‑flow issue on the Space Launch System (SLS) upper stage rocket.

“Work on the rocket and spacecraft will continue in the coming weeks as NASA prepares for rolling the rocket out to the launch pad again later this month ahead of a potential launch in April,” NASA wrote in an update on Tuesday.

Repair Work in the Vehicle Assembly Building

• The repair was performed inside the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center (KSC) in Florida.
• Artemis II’s SLS and Orion crew capsule have been in the VAB since Feb. 25, after rolling back from Launch Pad 39B.
• A few days earlier, the Artemis II stack successfully completed a wet dress rehearsal, a two‑day practice run of launch‑preparation procedures.

During the rehearsal, NASA detected an interruption in helium flow to the SLS upper stage. Helium pressurizes the rocket’s propellant tanks, so the issue required a rollback because the affected area could not be accessed from the pad. This setback removed the potential March launch opportunity for Artemis II, which will carry four astronauts on a roughly 10‑day flight around the Moon—the first crewed lunar mission since Apollo 17 in 1972.

Helium‑Flow Issue and Fix

The problem centered on a seal in a quick‑disconnect interface that allows helium to flow from ground equipment into the SLS upper stage. The seal was obstructing the interface, preventing proper helium pressurization. NASA technicians replaced the seal in the VAB, restoring the helium flow path and putting the April launch window back into consideration.

Upcoming Launch Windows

The next Artemis II launch opportunities in April are:

• April 1
• April 3–6
• April 30

These dates remain viable pending final checks and integration activities.