International Space Station – NASA’s Boeing Crew Flight Test

NASA Decides to Bring Starliner Spacecraft Back to Earth Without Crew

Boeing's Starliner spacecraft that launched NASA's Crew Flight Test astronauts Butch Wilmore and Suni Williams to the International Space Station is pictured docked to the Harmony module's forward port. This view is from a window on the SpaceX Dragon Endeavour spacecraft docked to the port adjacent to the Starliner. — Boeing’s Starliner spacecraft that launched NASA’s Crew Flight Test astronauts Butch Wilmore and Suni Williams to the International Space Station is pictured docked to the Harmony module’s forward port. This view is from a window on the SpaceX Dragon Endeavour spacecraft docked to the port adjacent to the Starliner. Photo credit: NASA

NASA will return Boeing’s Starliner to Earth without astronauts Butch Wilmore and Suni Williams aboard the spacecraft, the agency announced Saturday during a news conference. The uncrewed return allows NASA and Boeing to continue gathering testing data on Starliner during its upcoming flight home, while also not accepting more risk than necessary for its crew. The news conference is available here.

Wilmore and Williams, who flew to the International Space Station in June aboard NASA’s Boeing Crew Flight Test, have been busy supporting station research, maintenance, and Starliner system testing and data analysis, among other activities.

“Spaceflight is risky, even at its safest and most routine. A test flight, by nature, is neither safe, nor routine. The decision to keep Butch and Suni aboard the International Space Station and bring Boeing’s Starliner home uncrewed is the result of our commitment to safety: our core value and our North Star,” said NASA Administrator Bill Nelson. “I’m grateful to both the NASA and Boeing teams for all their incredible and detailed work.”

Wilmore and Williams will continue their work formally as part of the Expedition 71/72 crew through February 2025. They will fly home aboard a Dragon spacecraft with two other crew members assigned to the agency’s SpaceX Crew-9 mission. Starliner is expected to depart from the space station and make a safe, controlled autonomous re-entry and landing in early September.

NASA and Boeing identified helium leaks and experienced issues with the spacecraft reaction control thrusters on June 6 as Starliner approached the space station. Since then, engineering teams have completed a significant amount of work, including reviewing a collection of data, conducting flight and ground testing, hosting independent reviews with agency propulsion experts, and developing various return contingency plans. The uncertainty and lack of expert concurrence does not meet the agency’s safety and performance requirements for human spaceflight, thus prompting NASA leadership to move the astronauts to the Crew-9 mission.

“Decisions like this are never easy, but I want to commend our NASA and Boeing teams for their thorough analysis, transparent discussions, and focus on safety during the Crew Flight Test,” said Ken Bowersox, associate administrator for NASA’s Space Operations Mission Directorate. “We’ve learned a lot about the spacecraft during its journey to the station and its docked operations. We also will continue to gather more data about Starliner during the uncrewed return and improve the system for future flights to the space station.”

Starliner is designed to operate autonomously and previously completed two uncrewed flights. NASA and Boeing will work together to adjust end-of-mission planning and Starliner’s systems to set up for the uncrewed return in the coming weeks. Starliner must return to Earth before the Crew-9 mission launches to ensure a docking port is available on station.

“Starliner is a very capable spacecraft and, ultimately, this comes down to needing a higher level of certainty to perform a crewed return,” said Steve Stich, manager of NASA’s Commercial Crew Program. “The NASA and Boeing teams have completed a tremendous amount of testing and analysis, and this flight test is providing critical information on Starliner’s performance in space. Our efforts will help prepare for the uncrewed return and will greatly benefit future corrective actions for the spacecraft.”

NASA’s Commercial Crew Program requires spacecraft fly a crewed test flight to prove the system is ready for regular flights to and from the space station. Following Starliner’s return, the agency will review all mission-related data to inform what additional actions are required to meet NASA’s certification requirements.

The agency’s SpaceX Crew-9 mission, originally slated with four crew members, will launch no earlier than Tuesday, Sept. 24. The agency will share more information about the Crew-9 complement when details are finalized.

NASA and SpaceX currently are working several items before launch, including reconfiguring seats on the Crew-9 Dragon, and adjusting the manifest to carry additional cargo, personal effects, and Dragon-specific spacesuits for Wilmore and Williams. In addition, NASA and SpaceX now will use new facilities at Space Launch Complex-40 at Cape Canaveral Space Force Station in Florida to launch Crew-9, which provides increased operational flexibility around NASA’s planned Europa Clipper launch.

The Crew-9 mission will be the ninth rotational mission to the space station under NASA’s Commercial Crew Program, which works with the American aerospace industry to meet the goal of safe, reliable, and cost-effective transportation to and from the orbital outpost on American-made rockets and spacecraft launching from American soil.

For more than two decades, people have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and demonstrating new technologies, making research breakthroughs not possible on Earth. The station is a critical testbed for NASA to understand and overcome the challenges of long-duration spaceflight and to expand commercial opportunities in low Earth orbit. As commercial companies focus on providing human space transportation services and destinations as part of a robust low Earth orbit economy, NASA’s Artemis campaign is underway at the Moon where the agency is preparing for future human exploration of Mars.

NASA Leaders Discuss Review Process for Starliner Crew Flight Test

Looking down at Boeing's Starliner spacecraft attached to the International Space Station. — The Starliner spacecraft on NASA’s Boeing Crew Flight Test is pictured docked to the Harmony module’s forward port as the International Space Station orbited 263 miles above the Mediterranean Sea. Photo credit: NASA

NASA’s human spaceflight management team provided a media update Aug. 14 on the agency’s Boeing Crew Flight Test at the International Space Station. The group, including the Associate Administrator for Space Operations Ken Bowersox, highlighted the role safety plays as a core value at NASA and how safety guides the decision-making process for the mission.

The panel also touched on numerous aspects of the Crew Flight Test as NASA and Boeing evaluate the Starliner testing data generated over the past few weeks ahead of the agency’s Commercial Crew Program control board. NASA then plans to hold a readiness review where agency leadership will finalize the plan to return astronauts Butch Wilmore and Suni Williams from the space station. Following the readiness review, mission leadership will host a televised briefing to discuss the decision and path forward.

Listen to a full replay of the media update. Other briefing participants included:

Joel Montalbano, deputy associate administrator, NASA’s Space Operations Mission Directorate
Russ DeLoach, chief, NASA’s Office of Safety and Mission Assurance
NASA chief astronaut Joe Acaba
Emily Nelson, chief flight director, NASA’s Flight Operations Directorate

Although no final decisions have been made, teams are evaluating returning Wilmore and Williams aboard the Starliner spacecraft. In parallel, NASA also is looking more closely at the capability to return the crew as part of the agency’s SpaceX Crew-9 mission. Crew-9 will launch no earlier than Tuesday, Sept. 24, and return to Earth in February 2025.

While work continues on Earth to analyze the Starliner spacecraft and its systems, Wilmore and Williams continued their work aboard the International Space Station. Since the mission is a flight test, the crew has undergone rigorous training for any duties or issues that may arise, and the astronauts are well prepared for all situations.

The main goal of the agency’s Commercial Crew Program is two unique human spaceflight systems. Should any one system encounter an issue, NASA still has the capability to launch and return crew members to ensure safety and a continuous human presence aboard the station.

The International Space Station is the world’s leading space laboratory where researchers conduct cutting-edge research and technology development that will enable human and robotic exploration of destinations beyond low Earth orbit, including the Moon and Mars.

NASA, Boeing Continue Data Analysis for Crew Flight Test Evaluation

NASA and Boeing teams continue analyzing data from recent ground and spacecraft testing as they evaluate the Starliner spacecraft’s propulsion system during NASA’s Boeing Crew Flight Test mission.

Teams are taking their time to analyze the results of recent docked hot-fire testing, finalize flight rationale for the spacecraft’s integrated propulsion system, and confirm system reliability ahead of Starliner’s return to Earth from the International Space Station.

Forward work for the team also includes finalizing the spacecraft’s undocking procedures and operational mitigations that could be used in flight, if needed, to build further confidence in the system. Meanwhile, Starliner ground and mission support teams are continuing to prepare for undocking by participating in integrated simulations with space station operations teams.

Following the completion of Starliner’s return planning, which is expected to continue into next week, more information will be shared about the agency’s return readiness review preparations and subsequent media briefing. As always, astronaut safety remains the top priority for both NASA and Boeing.

While engineers conduct their spacecraft studies on Earth, NASA astronauts Butch Wilmore and Suni Williams are closely following the ground team’s progress while aboard the station. The duo has integrated into the daily workload of the orbiting laboratory, giving the station a crew of nine as their mission overlaps with Expedition 71.

The astronauts worked primarily on lab upkeep aboard the orbiting outpost on Wednesday. Wilmore spent time inspecting advanced plumbing hardware then packed the life support components for return to Earth. Williams set up high-definition video gear inside the Columbus laboratory module then inspected a bar code reader and radio frequency hardware. Wilmore and Williams also partnered up and organized cargo inside the Tranquility module before calling into a Boeing mission controllers conference.

NASA, Boeing Complete Second Docked Starliner Hot Fire Test

Image shows Boeing's Starliner crew capsule docked to the Harmony module's forward port at the International Space Station — Boeing’s Starliner crew capsule docked to the Harmony module’s forward port at the International Space Station on July 3, 2024.
Photo credit: NASA

Engineering teams with NASA and Boeing completed a hot fire test of the Starliner spacecraft’s reaction control system jets on July 27 to evaluate the spacecraft’s propulsion system. NASA astronauts Butch Wilmore and Suni Williams, assigned to the agency’s Boeing Crew Flight Test, were seated inside the docked spacecraft during the test as part of preparations before their return aboard Starliner from the International Space Station.

The test involved firing 27 of the spacecraft’s 28 jets for short bursts, moving through them one at a time to check thruster performance and helium leak rates. Preliminary results show all the tested thrusters are back to preflight levels based on thrust and chamber pressure.

As part of the test configuration, all helium manifolds, which control and direct the flow of helium, were opened allowing engineers to continue evaluation of Starliner’s helium supply and leak rates. The teams verified Starliner continues to show the margin needed to support a return trip from the station. Following the test, the helium manifolds were closed and will remain closed until Starliner activates its propulsion system ahead of undocking. Teams also will verify the helium leak rate before Starliner undocks.

Teams are taking their time to analyze the results of recent docked hot-fire testing, finalize flight rationale for the spacecraft’s integrated propulsion system, and confirm system redundancy ahead of Starliner’s return to Earth from the International Space Station.

While ground teams work to finalize Starliner’s return to Earth, Wilmore and Williams continue to work alongside the Expedition 71 crew, assisting with science investigations and maintenance activities. On July 29, Wilmore and Williams entered their spacecraft and checked its water systems, called down to Boeing mission personnel for a conference, and put on their space suits long enough to perform a pressure test. Wilmore started his morning in the Harmony module, assembling the BioServe centrifuge as Williams reviewed procedures for operating the Astrobee free-flying robotic assistants.

For the latest mission updates, follow the commercial crew blog, @commercial_crew on X, and commercial crew on Facebook.

NASA, Boeing Update Starliner Crew Flight Test Return from Station

The Starliner spacecraft on NASA’s Boeing Crew Flight Test is pictured docked to the Harmony module’s forward port as the International Space Station orbited 263 miles above the Mediterranean Sea.

Teams from NASA and Boeing now are targeting no earlier than 10:10 p.m. EDT Tuesday, June 25, for the undocking of the Starliner spacecraft from the International Space Station. For the primary undocking opportunity, NASA astronauts Butch Wilmore and Suni Williams, the first crew to fly aboard Starliner, would land about 4:51 a.m. on Wednesday, June 26, at White Sands Space Harbor in New Mexico.

Mission teams supporting NASA’s Boeing Crew Flight Test continue to review Starliner’s data from the completed test objectives.

During a media teleconference on Tuesday, Steve Stich, manager of NASA’s Commercial Crew Program, discussed the flight test and upcoming return plans. Stich was joined by Dana Weigel, manager of NASA’s International Space Station Program; Mike Lammers, flight director at NASA’s Johnson Space Center in Houston; and Mark Nappi, vice president and manager of Boeing’s Commercial Crew Program. Listen to a full replay of the teleconference.

Following undocking and the deorbit burn, Starliner will descend under parachutes to land in the desert grounds of White Sands. Airbags attached to the bottom of Starliner will soften the spacecraft’s touchdown. The landing will mark the first time an American capsule has touched down on land with astronauts aboard. A team of NASA and Boeing specialists will retrieve the crew soon after landing.

Wilmore and Williams docked the Starliner spacecraft to the space station’s forward port on June 6 and have been testing spacecraft systems and performing tasks aboard the orbiting laboratory.

Get the latest mission updates by following the commercial crew blog, @commercial_crew on X, and commercial crew on Facebook.

Crew Works Genetics, Maintenance and is GO for Spacewalk

Image of Expedition 71 crew at the International Space Station — The seven Expedition 71 crew members gather with the two Crew Flight Test members for a team portrait aboard the space station. In the front from left are, Suni Williams, Oleg Kononenko, and Butch Wilmore. Second row from left are, Alexander Grebenkin, Tracy C. Dyson, and Mike Barratt. In the back are, Nikolai Chub, Jeanette Epps, and Matthew Dominick. Photo credit: NASA

Spacewalk preparations and genetic research were the prime responsibilities for the orbital residents aboard the International Space Station on Tuesday. The Expedition 71 crew also worked on futuristic piloting studies and more eye and ear checks.

NASA astronauts Tracy C. Dyson and Matthew Dominick have been given the “go” by mission managers to begin a six-and-a-half-hour spacewalk at 8 a.m. EDT on Thursday. The duo will work outside in the vacuum of space removing communications hardware, known as the radio frequency group, then sampling for microorganisms potentially living on the outside of the orbital outpost. This will be Dyson’s fourth spacewalk and Dominick’s first.

The duo joined each other after lunchtime reviewing spacewalk safety procedures and printing checklists they will wear on their spacesuit cuffs. Toward the end of the day, the spacewalkers gathered with NASA Flight Engineers Mike Barratt and Jeanette Epps and called down to mission controllers to discuss readiness for Thursday’s spacewalk.

Mission managers will discuss the upcoming spacewalk details during a news conference at 4 p.m. today. Live coverage will air on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website. Learn how to stream NASA TV through a variety of platforms including social media.

Barratt earlier scanned Dyson’s eyes with the Ultrasound 2 device imaging her cornea, lens, and optic nerve. Dominick recorded a video greeting for an audience in Colorado as Epps swapped water tanks inside the Tranquility module.

Starliner astronauts Butch Wilmore and Suni Williams spent their day on biomedical activities and gene sequence training. Wilmore took an inventory of the Human Research Facility checking items such as blood tube kits, saliva sample packs, gloves, and more. Williams studied procedures to collect microbe samples, extract their DNA, and sequence their genes to learn how to identify bacteria and fungi living in station water systems.

Cosmonauts Oleg Kononenko and Nikolai Chub took turns on Tuesday jogging on a treadmill while attached to electrodes recording their health data for a physical fitness test. The duo also worked on electronics gear swaps, life support maintenance, and station window inspections. Flight Engineer Alexander Grebenkin studied experimental spacecraft and robotic piloting techniques that may be used to train crew members on planetary missions. He also conducted a hearing test wearing headphones connected to a computer and responding to a series of tones.

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on X, as well as the ISS Facebook and ISS Instagram accounts.

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NASA’s Boeing Starliner Astronauts Enter Space Station

The seven Expedition 71 crew members gather with the two Crew Flight Test members for a team portrait aboard the space station. In the front from left are, Suni Williams, Oleg Kononenko, and Butch Wilmore. Second row from left are, Alexander Grebenkin, Tracy C. Dyson, and Mike Barratt. In the back are, Nikolai Chub, Jeanette Epps, and Matthew Dominick. Credit: NASA TV

NASA astronauts Butch Wilmore and Suni Williams entered the International Space Station at 3:45 p.m. EDT.

The Boeing Starliner spacecraft, successfully docked to the International Space Station at 1:34 p.m. The spacecraft launched on a United Launch Alliance Atlas V rocket at 10:52 a.m. June 5 from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida.

NASA will provide coverage of the post-docking news conference at 5 p.m. on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website.

As part of the agency’s Commercial Crew Program, the mission is the first crewed flight for the Starliner spacecraft. Learn more about the mission by following the commercial crew blog, @commercial_crew on X, and commercial crew on Facebook.

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on X, as well as the ISS Facebook and ISS Instagram accounts.

Get weekly updates from NASA Johnson Space Center at: https://roundupreads.jsc.nasa.gov/

Get the latest from NASA delivered every week. Subscribe here: www.nasa.gov/subscribe

Boeing’s Crew Flight Test on Starliner Docks to Station

Boeing’s Starliner spacecraft, with NASA astronauts Butch Wilmore and Suni Williams aboard, approaches the International Space Station for an autonomous docking as it orbited 257 miles above the South Pacific Ocean. Photo credit: NASA Television

NASA astronauts Butch Wilmore and Suni Williams, aboard Boeing’s Starliner spacecraft, successfully docked to the International Space Station at 1:34 p.m. EDT. Starliner launched on a United Launch Alliance Atlas V rocket at 10:52 a.m., June 5 from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida.

During flight, Wilmore and Williams successfully performed manual piloting demonstrations of Starliner and completed a sleep period. Prior to crew sleep, mission teams identified three helium leaks in the spacecraft. One of these was previously discussed before flight along with a management plan, and the other two occured when the spacecraft arrived in orbit. To monitor and manage these leaks, the three helium manifolds were closed in flight during the crew’s sleep period and were all reopened ahead of rendezvous and docking operations. After docking, all Starliner manifolds are closed per normal plans.

As Starliner began its approach to the space station, five reaction control system thrusters failed off during flight. Mission teams performed a series of hot-fire tests which re-enabled four of the thrusters while the crew manually piloted the spacecraft at the station’s 200-meter hold point. After re-selecting four of the thrusters, Starliner had the fault tolerance required to approach the space station for docking. At the 10-meter hold point, the mission team completed system readiness evaluations and proceeded with docking.

Starliner’s hatch opening will begin about 3:20 p.m., with welcome remarks to follow.

NASA will continue coverage on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website. Learn how to stream NASA TV through a variety of platforms including social media.

NASA will host a post-docking media conference at approximately 5 p.m. with the following participants:

NASA Associate Administrator Jim Free
Steve Stich, manager, NASA’s Commercial Crew Program
Jeff Arend, manager for systems engineering and integration, NASA’s International Space Station Office
Mark Nappi, vice president and program manager, Commercial Crew Program, Boeing

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on X, as well as the ISS Facebook and ISS Instagram accounts.

Get weekly updates from NASA Johnson Space Center at: https://roundupreads.jsc.nasa.gov/

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Starliner Approaches Station as Live Coverage Continues

iss071e170979 (June 6, 2024) -- Boeing's Starliner spacecraft is pictured approaching the International Space Station for an autonomous docking on June 6, 2024 as the spacecraft and orbiting laboratory soared 257 miles above the South Pacific Ocean. Starliner launched on June 5, with NASA astronauts Butch Wilmore and Suni Williams aboard, as part of NASA's Boeing Crew Flight Test. This first crewed flight of Starliner aims to certify the spacecraft for rotational missions to the space station. — Boeing’s Starliner spacecraft is pictured approaching the International Space Station for an autonomous docking on June 6, 2024 as the spacecraft and orbiting laboratory soared 257 miles above the South Pacific Ocean.

NASA’s coverage of the Boeing Starliner spacecraft flight to the International Space Station continues on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website. The Starliner spacecraft is performing its careful approach to the space station with NASA astronauts Butch Wilmore and Suni Williams. After conducting a series of reaction control system thruster tests, four thrusters were recovered from five that had gone out. The spacecraft will conduct a planned hold at 10 meters from its station docking port to assess readiness. The second docking window opens at 1:33 p.m. ET.

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on X, as well as the ISS Facebook and ISS Instagram accounts.

Get weekly updates from NASA Johnson Space Center at: https://roundupreads.jsc.nasa.gov/

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Boeing’s Starliner Approaching Station Live on NASA TV

Boeing's Starliner crew ship approaches the space station during the company's uncrewed Orbital Flight Test-2 mission on May 20, 2022. — Boeing’s Starliner crew ship approaches the space station during the company’s uncrewed Orbital Flight Test-2 mission on May 20, 2022.

NASA’s arrival coverage of Boeing’s Starliner spacecraft to the International Space Station is now underway on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website. Docking is scheduled at approximately 12:15 p.m. EDT Thursday, June 6.

NASA astronauts Butch Wilmore and Suni Williams launched safely on the Starliner spacecraft on a United Launch Alliance Atlas V rocket at 10:52 a.m. June 5 from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida.

The Starliner crew continues to make their way to the space station. During flight, Wilmore and Williams successfully performed manual piloting demonstrations of Starliner and completed a sleep period. Prior to crew sleep, mission teams identified three helium leaks in the spacecraft. One of these was previously discussed before flight along with a management plan, and the other two are new since the spacecraft arrived in orbit. To monitor and manage these leaks, the three helium manifolds were isolated. Those manifolds have all been reopened prior to a Starliner height adjust burn, called NHPC. All affected manifolds will remain open for rendezvous and docking operations.

Following in-flight reviews of the mission and helium leaks, the Starliner and International Space Station mission management teams are “go” to proceed with space station arrival. The flight control team will continue to monitor the leak rates in Starliner’s propulsion system. After docking, all of Starliner manifolds will be closed per normal plans. All other Starliner systems are functioning normally.

NASA’s arrival and in-flight event coverage is as follows (all times Eastern and subject to change based on real-time operations):

12:15 p.m. – Targeted docking

2 p.m. – Hatch opening

2:20 p.m. – Welcome remarks

3:30 p.m. – Post-docking news conference at NASA Johnson with the following participants:

NASA Associate Administrator Jim Free
Steve Stich, manager, NASA’s Commercial Crew Program
Jeff Arend, manager for systems engineering and integration, NASA’s International Space Station Office
Mark Nappi, vice president and program manager, Commercial Crew Program, Boeing

Coverage of the post-docking news conference will air live on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website.

To attend the post-docking briefing, U.S. media must contact the NASA Johnson newsroom at: jsccommu@mail.nasa.gov or 281-483-5111 by 1 p.m. June 6. To join by phone, media must contact the NASA Johnson newsroom by 3 p.m. June 6.

5:50 p.m. – NASA Administrator Bill Nelson, Deputy Administrator Pam Melroy, Associate Administrator Jim Free, Associate Administrator for Space Operations Ken Bowersox, and Johnson Space Center Director Vanessa Wyche will speak with Wilmore and Williams about their launch aboard the Starliner spacecraft.

Coverage of the Earth to space call will air live on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website.

Learn more about station activities by following the space station blog, @space_station and @ISS_Research on X, as well as the ISS Facebook and ISS Instagram accounts.

Get weekly updates from NASA Johnson Space Center at: https://roundupreads.jsc.nasa.gov/

Get the latest from NASA delivered every week. Subscribe here: www.nasa.gov/subscribe