Live coverage: Third time’s the charm for the Boeing Starliner Crew Flight Test

A Challenging Road to Launch

The journey to this successful launch was marked by significant technical challenges and repeated delays. The initial launch attempt on May 6 was aborted due to an oxygen pressure relief valve malfunction on the Atlas V rocket’s upper stage, which forced teams to stand down and conduct extensive assessments. Subsequently, a helium leak detected in Starliner’s service module further postponed the mission, requiring careful troubleshooting to ensure crew safety.

The second launch attempt on June 1 was halted during the countdown when one of the three ground launch sequencer circuit boards failed to synchronize properly with the others. This failure occurred just after a planned hold at T-minus 4 minutes, leading to a scrub at T-minus 3 minutes and 50 seconds. Because the mission had an instantaneous launch window, there was insufficient time to diagnose and fix the issue before liftoff, prompting another delay.

Throughout these setbacks, collaboration between NASA, Boeing, and United Launch Alliance (ULA) was critical. ULA President and CEO Tory Bruno described the initial disappointment as brief, emphasizing the teams’ swift pivot to problem-solving and preparation for the next launch attempt. Boeing’s Starliner project manager, Mark Nappi, highlighted the team’s resilience, comparing their focus to that of athletes quickly moving past a bad call to concentrate on the next play. This collective determination was essential to overcoming the hurdles and ultimately achieving a successful launch.

The Successful Launch and Orbital Insertion

At 10:52 a.m. Eastern Daylight Time on June 5, the Atlas V rocket lifted off from Cape Canaveral’s Pad 41, carrying the Starliner spacecraft into orbit. The launch was supported by favorable weather conditions, with the 45th Weather Squadron forecasting a 90 percent chance of clear skies and only minor concerns about cumulus clouds and solar activity. The presence of sunspots, which had recently caused auroras worldwide, was monitored closely but did not impact the launch.

Approximately 31 minutes into the flight, Starliner successfully separated from the Centaur upper stage of the Atlas V rocket. It then completed its orbital insertion burn, propelling the spacecraft into its initial orbit. A subsequent burn at one hour and 15 minutes into the mission circularized the orbit, setting the stage for rendezvous with the International Space Station.

NASA Administrator Bill Nelson praised the milestone, calling it a new chapter in American space exploration and commending the bravery of astronauts Wilmore and Williams. He emphasized the daring nature of human spaceflight and the importance of this mission for NASA, its commercial partners, and the future of exploration.

Mission Objectives and Timeline

Following the successful orbital maneuvers, astronauts Wilmore and Williams are scheduled to dock with the International Space Station around 12:15 p.m. EDT on June 6. This docking will test Starliner’s systems in the operational environment of the ISS and demonstrate its ability to support crew operations aboard the station.

The mission is planned to last over a week, with the crew returning to Earth for a landing in White Sands, New Mexico, on June 14. This extended timeline allows NASA and Boeing to evaluate the spacecraft’s performance during prolonged operations, including life support, navigation, and docking systems.

If the mission proceeds as planned, it will pave the way for Boeing and NASA to complete Starliner’s certification for regular crew rotation missions. These routine flights could begin as early as spring 2025, providing an additional spacecraft option for transporting astronauts to and from the ISS.

Context Within NASA’s Commercial Crew Program

Boeing’s Starliner is one of two spacecraft developed under NASA’s Commercial Crew Program, alongside SpaceX’s Crew Dragon. SpaceX made history in 2020 by launching its first crewed mission, Demo-2, and has since completed more than a dozen flights, ferrying over 50 astronauts to space, primarily to the ISS.

In contrast, Boeing has faced a series of technical challenges that delayed Starliner’s debut by several years and resulted in over $1 billion in additional costs. These issues ranged from software glitches to hardware malfunctions, underscoring the complexity of developing a new crewed spacecraft from the ground up.

The successful Crew Flight Test (CFT) mission is a pivotal step toward certifying Starliner for routine missions to the ISS. Adding Starliner as a second crew transport vehicle enhances NASA’s human spaceflight capabilities by providing redundancy and flexibility, which are critical for maintaining continuous crew presence in space.

Technical and Operational Challenges Overcome

The Starliner program’s development has been fraught with technical obstacles. Early in the program, issues such as valve malfunctions on the rocket’s upper stage and helium leaks in the service module required extensive investigation and corrective measures. Software synchronization problems, like the ground launch sequencer circuit board failure, further complicated pre-launch preparations.

These challenges highlight the intricate nature of spaceflight hardware and software integration, where even minor anomalies can delay missions and jeopardize crew safety. The rigorous testing, quality assurance, and cross-agency collaboration among NASA, Boeing, and ULA were instrumental in identifying root causes and implementing solutions.

The teams’ ability to adapt quickly and maintain focus under pressure exemplifies the demanding environment of human spaceflight development. Their success on June 5 demonstrates the value of perseverance and meticulous engineering in overcoming setbacks to achieve mission objectives.

What this means

The successful launch and orbital insertion of Boeing’s CST-100 Starliner on June 5, 2024, represents a major achievement after years of delays and technical challenges. This mission not only validates the spacecraft’s design and operational capabilities but also strengthens NASA’s Commercial Crew Program by introducing a second crew transportation system alongside SpaceX’s Crew Dragon. As astronauts Butch Wilmore and Suni Williams proceed with their mission aboard the ISS, the spaceflight community watches closely, hopeful that Starliner’s success will usher in a new era of reliable, American-made crewed spaceflight. Looking ahead, Boeing and NASA’s continued collaboration and rigorous testing will be vital to ensuring Starliner’s readiness for regular missions, enhancing the United States’ ability to maintain a continuous human presence in space.