
STS-94 -- Microgravity Science Laboratory-1 (image)
NOTE: Columbia left the Vehicle Assembly Building at about 2:45 a.m. today and arrived at pad 39A at about 8 a.m. (image) Preparations are underway for hot fire tests of auxiliary power units No. 2 and No. 3, scheduled to occur tonight. Once the Rotating Service Structure is in place tomorrow, work will begin to replace 36 thermal protection system tiles on Columbia's forward reaction control system.
Shuttle technicians raised the concern of possible cracked tiles two weeks ago during routine inspections of the FRCS. Evaluations of the FRCS tiles on the entire Shuttle fleet helped engineers decide to replace the tiles with stronger ones.
STS-94 SCHEDULED OPERATIONAL MILESTONES (dates are target only):
STS-85 -- CRISTA-SPAS-2 (image)
NOTE: Heat shield installation is complete and leak checks of the crew hatch are also complete. Work remains on schedule for a Crew Equipment Interface Test on Saturday. Discovery's orbiter maneuvering system and reaction control system will undergo flight control check-outs today. Evaluations of the orbiter's forward reaction control system TPS tiles have resulted in a decision to replace 44 tiles.
STS-85 SCHEDULED OPERATIONAL MILESTONES (dates are target only):
STS-86 -- 7th MIR DOCKING & SPACEHAB DM
NOTE: Fuel cell No. 3 is installed and electrical hookups are in work. Waterproofing of Atlantis' thermal protection system is in work. The orbiter maneuvering system functional check outs are scheduled to begin later this week. Evaluations of the orbiter's forward reaction control system TPS tiles have resulted in a decision to replace 43 tiles.
STS-89 -- 8th MIR DOCKING & SPACEHAB DMNOTE: Endeavour's payload bay doors were opened yesterday and technicians are gaining access to the orbiter's midbody today. Installation of the radiators in the payload bay is scheduled this week and servicing of the orbiter's freon coolant loop No. 2 is also in work. Evaluations of Endeavour's FRCS tiles have resulted in a decision to replace 41 tiles.
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