https://edition.cnn.com/2020/02/07/tech/boeing-starliner-software-commercial-crew-ssn/index.html
Boeing's Starliner spacecraft, which is designed to carry NASA astronauts to the International Space Station, encountered a second, previously undisclosed, software issue during a botched test flight in December.
The space agency said Friday that it plans to launch a full-scale safety review of the company's work on Starliner, noting that there were "numerous instances where the Boeing software quality processes either should have or could have uncovered the defects." That review will attempt to determine why the software problems weren't detected during ground tests prior to the launch
Paul Hill, a member of NASA's safety adviser panel, disclosed a separate software problem during a public meeting on Thursday, saying it could have caused a "catastrophic failure," according to Space News
The error could have caused another misfire during the spacecraft's return — specifically, when Starliner's crew cabin separated from its service module. The service module is a cylindrical adapter that sits beneath the crew cabin and powers the capsule during flight, and it's supposed to be jettisoned before landing.