Boeing Crewed Flight Test

crewed mission of Boeing Starliner to the International Space Station

Boeing Crew Flight Test (Boe-CFT) was the first crewed mission of the Boeing Starliner capsule. Launched on 5 June 2024, the mission flew a crew of two NASA astronauts, Barry E. Wilmore and Sunita Williams, from Cape Canaveral Space Force Station to the International Space Station. The mission was meant to last eight days, ending on 14 June with a landing in the American Southwest. However, the capsule's thrusters malfunctioned as Starliner approached the ISS. After more than two months of investigation, NASA decided it was too risky to return Wilmore and Williams to Earth aboard Starliner. Instead, the Boeing spacecraft returned uncrewed on 7 September 2024, and the astronauts will ride down on the SpaceX Crew-9 spacecraft in February 2025.

Boeing Crew Flight Test
Boeing Starliner Calypso launches on the Crew Flight Test atop an Atlas V rocket.
NamesBoe-CFT
Mission typeFlight test
OperatorBoeing Defense, Space, & Security
COSPAR ID2024-109A
SATCAT no.59968
Websitenasa.gov/boeing-crewflighttest
Mission durationPlanned: 8 days
Actual: 93 days, 13 hours and 9 minutes
Spacecraft properties
SpacecraftBoeing
Starliner Calypso
Spacecraft typeBoeing Starliner
ManufacturerBoeing Defense,
Space, & Security
Crew
Crew size2
LaunchingBarry E. Wilmore
Sunita Williams
LandingNone
Start of mission
Launch date5 June 2024, 14:52:15 UTC
(10:52:15 am EDT)
RocketAtlas V N22 (AV-085)
Launch siteCape Canaveral,
SLC-41
ContractorUnited Launch
Alliance
End of mission
Landing date7 September 2024, 04:01:35 UTC
(6 September, 10:01:35 MDT)
Landing siteWhite Sands Space Harbor
Orbital parameters
Reference systemGeocentric orbit
RegimeLow Earth orbit
Perigee315 km (196 mi)
Apogee324 km (201 mi)
Inclination51.66°
Docking with International Space Station
Docking portHarmony forward
Docking date6 June 2024, 17:34 UTC
Undocking date6 September 2024, 22:04 UTC
Time docked92 days, 4 hours, 30 minutes

Williams (left) and Wilmore (right)
Commercial Crew Development
← Boeing OFT-2
 
Boeing Starliner flights
← Boeing OFT-2
Boeing Starliner-1 →

Originally scheduled for launch in 2017, Boe-CFT experienced numerous delays. The spacecraft's two preceding uncrewed orbital flight tests, Boe‐OFT and Boe‐OFT‐2, were conducted in 2019 and 2022, respectively.

Starliner was placed atop the Atlas V launch vehicle on April 16, 2024, but the mission's launch was repeatedly postponed by technical problems. An oxygen valve problem on United Launch Alliance's (ULA) Atlas V rocket scrubbed the first launch attempt on 7 May. A second launch attempt on 1 June was scrubbed when a ground computer failed. Subsequent delays were caused by helium leaks in the Starliner's service module; helium leaks would continue to be a problem throughout the mission. The third launch attempt on 5 June at 14:52:15 UTC (10:52:15 am EDT local time at the launch site) was successful.