Photos: Atlas 5 rolls out for launch

United Launch Alliance called off a test-firing of the company’s first flight-rated Vulcan Centaur rocket at Cape Canaveral Thursday to troubleshoot a problem with the booster’s engine ignition system.

NASA has completed an exhaustive review of software problems and procedural oversights that prevented an unpiloted Boeing Starliner capsule from docking with the space station last year. The agency is implementing 80 recommendations to clear the way for a second test flight later this year and, if all goes well, Boeing’s first piloted flight next spring, officials said Tuesday.

The deal comes roughly two months after Firefly inked a deal with Lockheed Martin for up to 25 launches in a similar timeframe. The first Alpha launches under this new contract would launch no earlier than 2027.