but the vehicle was certified to make an abort landing for a single-engine failure any time during ascent.) The DCUs for each of the three Space Shuttle Main Engines (SSME) were fully redundant to ...

The NASA-developed flight software for the agency’s Space Launch System (SLS) vehicle successfully ... was also running its abort logic in a monitor-only mode for the first launch.

While their latest launch officially broke the record for fastest reflight of a space vehicle ... modes were considered unlikely at best. Failure was truly not an option with some of the Shuttle ...