Astronauts on ISS Confident in Starliner Return

Before Wilmore and Williams can return home, engineering teams need to run more simulations of similar thrusters and helium seals on the ground, to better understand the root causes of some of the technical issues Starliner experienced — and modify the way it will fly down, if necessary.

It was known there was one helium leak affecting the spaceship before the launch, but more leaks emerged during the flight. Helium, while non-combustible, provides pressure to the propulsion system.

What’s more, some of Starliner’s thrusters that provide fine maneuvering initially failed to kick in during its approach to the station, delaying docking.

Engineers are not sure why the craft’s computer “deselected” these thrusters, though they were able to restart all but one of them.

In a subsequent press call, Boeing executive Mark Nappi told reporters that the “working theory” for the thruster malfunction was overheating due to excessive firing.

Theories on the cause of the helium leaks ranged from debris entering the propulsion system to Boeing possibly installing seals that were undersized for the task.

Despite the lingering uncertainties surrounding Starliner’s technical issues, Wilmore and Williams remain confident in the spacecraft’s ability to bring them safely back to Earth. During the live press call from the International Space Station, the astronauts expressed their unwavering faith in the Starliner team and the vehicle itself.

“We’re absolutely confident,” Wilmore affirmed when asked about their trust in Starliner. Williams echoed his sentiment, saying, “I have a real good feeling in my heart that the spacecraft will bring us home, no problem.”

Their confidence stems from the extensive testing and preparation they have undergone during their extended stay on the ISS. The astronauts have had the opportunity to thoroughly evaluate Starliner’s systems, including its life support capabilities and its performance as a potential safe haven in case of emergencies on the station.

While awaiting their return, Wilmore and Williams have kept themselves occupied by conducting various experiments and tasks, such as gene sequencing in microgravity and maintaining critical life support systems like the urine recycling machine. These activities have not only contributed to the scientific objectives of the mission but have also helped to reinforce their trust in the spacecraft’s systems.

Despite the glitches and uncertainties surrounding Starliner’s technical issues, the astronauts’ confidence remains unwavering. Their hands-on experience with the spacecraft and their faith in the engineering teams working tirelessly to resolve the problems have bolstered their belief in a safe and successful return to Earth aboard the Starliner capsule.