Continuing concerns about the thruster system on Boeing’s Starliner space capsule may lead NASA to decide against letting astronauts take the craft back down to Earth from the International Space Station, mission managers said today.
In such a scenario, the two astronauts who rode to the ISS in Starliner for the capsule’s first crewed test mission in June would fly back down in a SpaceX Dragon capsule next February.
“We haven’t approved this plan,” Steve Stich, program manager for NASA’s Commercial Crew Program, told journalists during a teleconference. “In other words, we’ve done all the work to make sure this plan is there.”
Going ahead with the contingency plan would require shuffling arrangements for the next crew that’s due to take a Dragon to the ISS, known as Crew-9.
That crew would be cut back from four to two astronauts. Starliner’s test pilots, Butch Wilmore and Sunita Williams, would remain on the station for Crew-9’s tour of duty and return to Earth with Crew-9 as part of the regular rotation.
This week NASA pushed back Crew-9’s scheduled launch to no earlier than Sept. 24 to accommodate potential changes. Because of the parking arrangements at the station, the Starliner capsule would have to undock from the station before the Crew-9 launch and make an uncrewed, robotically controlled descent and landing.
