NASA, Boeing adjusting SLS Core Stage parameter limits for second Green Run firing

In parallel with vehicle and test stand preparations for a second Green Run Hot-Fire test later in February, the NASA Space Launch System (SLS) Program and Core Stage prime contractor Boeing are reviewing rule changes for the full, eight-minute firing. The Core Stage hardware and software executed the first-ever final countdown, engine start, and “plus count” firing well past T0 in the first test on January 16, but some pre-test predictions by analytical models did not match the integrated system behavior... More

(Source: NASASpaceFlight.com - Feb 8)