Apr 10 1981
From The Space Library
Nine minutes before launch time, NASA grounded the Space Shuttle Columbia until April 12, because one of five computers in its nose was failing to communicate properly with the other four. The decision to scrub the launch came after a three-hour delay from the original 6:50 a.m. liftoff time; a fuel cell warning light showed in the cockpit just 16 minutes beforehand. No sooner was that problem solved than a second one appeared, when the program in the backup computer did not match that of the four primary computers controlling the ship. (W Star, Apr 10/81, A-1)
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