NASA pushes Boeing Starliner return meeting to at least next week

Written by Copernical Team Friday, 02 August 2024 11:50

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International Space Station — Credit: Pixabay/CC0 Public Domain

Despite NASA officials last week stating a return readiness review might happen this week for Boeing's Starliner, teams instead continue to go over data for the spacecraft before any decision on its departure from the International Space Station.

NASA astronauts Butch Wilmore and Suni Williams await the decision of whether or not they will be able to climb back aboard the spacecraft for its return to Earth to complete the Crew Flight Test mission. That readiness review was pushed to next week at the earliest, according to an update from NASA.

The duo launched aboard Starliner atop a United Launch Alliance Atlas V rocket from Cape Canaveral Space Force Station back on June 5 for what was originally planned to be about an eight-day mission to the ISS. On their way to a June 6 docking, though, the spacecraft suffered failures on five of its 28 reaction control thrusters as well as several helium leaks in the service module that houses the thrusters.

NASA and Boeing decided to perform ground tests on a similar thruster to mimic conditions on the flight up and what the thrusters would face on the way back down to Earth as well as using a former service module that was never launched to figure out the likely reason behind the helium leaks.

Teams also performed a second hot fire test of 27 of the 28 thrusters this past weekend to test their capability and recheck helium leaks. Boeing said that hot fire test went well.

NASA Commercial Crew Program manager Steve Stich said in a press conference ahead of the test last week that teams would go over that test's data before setting up the higher-level return readiness review meeting after which they would declare a return date. He had expected that review to come late this week, but that's now been pushed back.

In an update Thursday on NASA's website, the agency announced teams need more time to go over the hot-fire testing, to finalize flight rationale for use of the affected propulsion system and confirm its reliability for the flight home.

Also still needed before the meeting is the finalizing of undocking procedures and "operational mitigations that could be used in flight, if needed, to build further confidence in the system," according to the NASA update.

Boeing posted this week that its teams on Tuesday spent time on the ground and in space prepping for Starliner's return procedures.

The simulated undocking involved Mission Control in Houston and Boeing's Mission Control Center at Kennedy Space Center as both Wilmore and Williams monitored the simulation from the ISS. Future Starliner mission NASA astronauts Scott Tingle and Mike Fincke took part in the Boeing Mission Simulator while Canadian Space Agency astronaut Josh Kutryk was monitored from Houston.

Also this week, Williams and Wilmore performed pressure checks on their spacesuits and performed an exterior inspection of the Starliner spacecraft, named Calypso, by using the Canadarm outside the ISS.

Boeing has also supplied data to NASA for potential return dates throughout August.

NASA said return planning will continue into next week before the return readiness review can take place.

NASA has the upcoming SpaceX Crew-9 launch targeting as early as Aug. 18 to launch from KSC, but will need Starliner to depart the ISS for a place to park unless NASA opts to send the Crew-8 astronauts home in their Crew Dragon spacecraft before Crew-9's arrival. The ISS has only two parking spaces for the likes of Starliner and Dragon.

Boeing is trying to play catchup to SpaceX to perform rotational astronaut flights from the U.S. for NASA. SpaceX performed its crewed flight test mission, Demo-2, back in May 2020. SpaceX has since flown its fleet of four Crew Dragon spacecraft 12 more times with three more potential launches before the end of the year.

Starliner's CFT marks its first human spaceflight, launching more than four years after SpaceX's Demo-2. It needs to complete the mission in order for NASA to consider certification of the spacecraft so Boeing can then share crew missions with SpaceX.

Starliner-1 would be that first mission, but it won't fly until at least August 2025, and would be the first of six contracted flights for Boeing flying a once-a-year rate trading off duties every six months with SpaceX until the ISS is shut down after 2030.

SpaceX, meanwhile, was given the go to prep for its 10th crew exchange flight as early as next February with the Crew-10 mission while also prepping Crew-11 in case Starliner-1 delays beyond next August.

2024 Orlando Sentinel. Distributed by Tribune Content Agency, LLC.

Citation: NASA pushes Boeing Starliner return meeting to at least next week (2024, August 2) retrieved 8 August 2024 from https://phys.org/news/2024-08-nasa-boeing-starliner-week.html

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