Update for May 22: Mission managers say they are evaluating plans for the first crewed flight test of Boeing’s Starliner space taxi and are working toward a launch opportunity on June 1.
An initial attempt to send the gumdrop-shaped capsule and two NASA astronauts to the International Space Station had to be scrubbed on May 6 due to concerns about a fluttery pressure regulation valve on the Atlas V rocket’s upper-stage oxygen tank.
Starliner and the rocket were rolled back to the Vertical Integration Facility at Cape Canaveral Space Force Station’s Launch Complex 41 in Florida. The valve was replaced on May 11 and passed a round of tests — but along the way, engineers detected a small helium leak that was traced to a flange on one of the Starliner service module’s thrusters.
The launch teams at Boeing and NASA determined that the leak was stable. Now they are working on a follow-on assessment of the propulsion system to understand the potential impacts of the helium system on some of the return scenarios for Starliner. That assessment will be evaluated during a flight test readiness review that hasn’t yet been scheduled.
The earliest opportunity for a second launch attempt is now 12:25 p.m. ET (9:25 a.m. PT) on June 1, with additional opportunities on June 2, 5 and 6. The launch teams had previously targeted May 21 and May 25 for liftoff.
