The engineers stopped the 'countdown' because something was wrong with the engine.
the 'countdown to' summer vacation
the steady 'countdown to' war
(..) we don't do the inspections? Right now I'm asking how often they reveal a problem. One in . But that's grounds for countdown halt. We can't take that chance. Anyone else know a safer way to buy more time? Dr. Keller, stretch watney's (..)2015 The Martian