Boeing says it is checking the propulsion system valves on its CST-100 Starliner spacecraft, after Tuesday’s planned launch was postponed.
The CST-100 Starliner will launch from Florida at some point to showcase how it can ferry crews to and from the International Space Station (ISS).
It will be the second test flight, and conducted with no people aboard.
The previous demonstration in 2019 encountered software problems that very nearly caused the loss of the capsule.
The Starliner will ride to orbit on an Atlas-5 rocket from the Cape Canaveral Space Force Station in Florida.
Controllers had been targeting Tuesday for the launch but scrubbed the countdown with two-and-a-half hours left on the clock, to allow for investigation of technical issues related to the capsule’s propulsion system.
Now Boeing says a rescheduled launch on Wednesday will not happen either, because it needs more time to discover the reason for “unexpected valve position indications in the propulsion system”.
It’s just over 10 years since Boeing first presented its design for the CST-100 Starliner at the Farnborough Air Show in the UK.
