...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...

...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...