Crew arrives at Cape Monday.
Technicians put in the new box Wednesday because a strong electrical odor had been noticed the day before. The box, inside Endeavour's cockpit, controls lighting for some of the instrument panels. NASA fell behind in the countdown because of the unexpected work, but was almost back on track by midmorning, said test director Steve Altemus. Forecasters put the odds of favorable conditions at 90 percent. Endeavour is loaded with a robotic arm for the international space station, as well as station supplies, for the 11-day delivery mission.