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Columbia's final overhaul included new wiring, increased thermal protection

...wiring. In its last mission before the overhaul, July 1999, a worn wire caused a power fluctuation that led two engine controllers to shut down five seconds after launch. Backup controllers took over automatically and the flight was not affected...

http://chronicle.augusta.com/stories/2003/02/18/nat_376080.shtml
National
Augusta's Still to guide astronauts into orbit

...system OMS: orbital maneuvering system SSME: space shuttle main engines GPC: general purpose computers MEC: main engine controller IEA: integrated electronic assembly MLS: microwave landing system VFR: visual flight rules TACAN: tactical air...

http://chronicle.augusta.com/stories/1998/10/25/tec_242889.shtml
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