Aalice.446 net.space utzoo!decvax!duke!harpo!npois!alice!sjb Mon Mar 22 17:59:07 1982 Shuttle News -- LAUNCH Roundup At 11:00:08 this morning, Columbia roared off its pad after its smoothest countdown ever. Though a fueling snag caused a one hour delay, NASA was elated to launch on the day it promised, showing customers they can do just that. On the way up, one APU started to overheat and was turned off. In space, the other two were turned off, as planned. Officials say backed up oil or ice may have caused the problem but hope that during the orbits, the unit will cool and will be functional for landing. The APU's provide the power to steer the shuttle's wing flaps and other aerodynamic surfaces. It can operated fully with just two of the three, and it can make an emergency landing with just one.