NASA astronauts Butch Wilmore and Suni Williams await the decision of whether or not they will be able to climb back aboard the spacecraft for its return to Earth to complete the Crew Flight Test mission. That readiness review was pushed to next week at the earliest, according to an update from NASA.

The duo launched aboard Starliner atop a United Launch Alliance Atlas V rocket from Cape Canaveral Space Force Station back on June 5 for what was originally planned to be about an eight-day mission to the ISS. On their way to a June 6 docking, though, the spacecraft suffered failures on five of its 28 reaction control thrusters as well as several helium leaks in the service module that houses the thrusters.

NASA and Boeing decided to perform ground tests on a similar thruster to mimic conditions on the flight up and what the thrusters would face on the way back down to Earth as well as using a former service module that was never launched to figure out the likely reason behind the helium leaks.