Discovery is mated to the external tank and solid rocket boosters in Vehicle Assembly Building high bay 3. Standard Shuttle interface testing revealed that an electrical cable on the left solid rocket booster was not conveying necessary signals between the left aft segment and left forward segment integrated electronic assembly boxes. Troubleshooting efforts revealed that one connector on the cable needs to be replaced. Workers will replace the connector and retest it in the VAB tomorrow, accommodating a Friday morning Shuttle transfer to the launch pad.
Managers expect no impact to the target launch date.
Columbia is powered up in OPF bay 1. Orbiter mass memory unit loadingis complete and workers opened the payload bay doors last night. Orbiter processing for mission STS-93 resumes following routine OPF receiving inspections. Modifications to Endeavour's radiator isolation valve are under way. Leak repair on the cold plate for the orbiter's power converter unit is ongoing.