CAPE CANAVERAL, Fla. (AP) — Boeing is now aiming for its first astronaut launch at the beginning of June, after spending the past few weeks struggling with more problems on the space capsule.

Officials for the company and NASA said Friday that intensive reviews indicate the Starliner capsule can safely fly two test pilots to the International Space Station, despite a propulsion system leak. The small helium leak was discovered following the first launch attempt on May 6 that was scuttled by an unrelated rocket problem now fixed.

Engineers suspect a defective rubber seal the size of a shirt button, and say that even if the leak worsens, it could be managed in flight. All of the capsule’s other seals checked out, said NASA’s commercial crew program manager Steve Stich, prompting managers to target June 1 for the launch.

This will be the third test flight for Starliner. Demos in 2019 and 2022 had no one aboard. Boeing had to repeat the empty flight because of software and other flaws the first time.