In The Field

Hydrogen Sensor Fails

Complicating the launch plans is the apparent failure of one of four hydrogen engine cut-off sensors on the shuttle’s main fuel tank (that’s the big orange one). Mission managers will now need to decide whether to launch with only three sensors, or scrub for 24 hours.

If history is any indication, we’re headed for scrubsville: In 2005, Discovery scrubbed for 24 hours after a similar failure. It then took off with three sensors the next day.


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