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Tracy Young
Kennedy Space Center, Fla.

NASA's Space Shuttle Processing Status Report
Note: NASA's Kennedy Space Center issues Space Shuttle Processing Status Reports periodically and is the source for information regarding processing activities associated with the vehicles and payloads. This report does not necessarily reflect the chronological order of future space shuttle missions. If you are a member of the media and would like further information, visit:

Mission: STS-121 - 18th International Space Station Flight (ULF1.1) - Multi-Purpose Logistics Module
Vehicle: Discovery (OV-103)
Location: Launch Pad 39B
Launch Date: Launch Processing Window July 1-19, 2006
Launch Pad: 39B
Crew: Lindsey, Kelly, Sellers, Fossum, Nowak, Wilson and Reiter
Inclination/Orbit Altitude: 51.6 degrees/122 nautical miles

Aft closeout work continues, with technicians performing final cleaning, inspections and installation of panels and thermal blankets on the avionics bays. Mid-body closeouts in the payload bay are scheduled to be completed today and the payload bay doors will be closed for flight this evening. The space shuttle main engine sensor checkouts were completed on Thursday. Flight crew systems workers de-stowed equipment from the crew cabin following completion of the Terminal Countdown Demonstration Test on Thursday, and are scheduled to install the extravehicular maneuvering units (the suits worn by shuttle crew members for spacewalks) on Saturday.

NASA managers are meeting at KSC today for the Flight Readiness Review that is expected to culminate in the setting of a launch date on Saturday.

Mission: STS-115 - 19th International Space Station Flight (12A) - P3/P4 Solar Arrays
Vehicle: Atlantis (OV-104)
Location: Orbiter Processing Facility Bay 1
Launch Date: No earlier than Aug. 28, 2006
Launch Pad: 39B
Crew: Jett, Ferguson, Tanner, Burbank, MacLean and Stefanyshyn-Piper
Inclination/Orbit Altitude: 51.6 degrees/122 nautical miles

In Orbiter Processing Facility bay 1, closeout work on Atlantis continues. Window No. 5 was replaced. Preparations for servicing of freon coolant loop No. 2 are under way. The coolant loop is part of the system that cools the avionics bays in the midbody and the aft of the orbiter. Main propulsion system leak checks are complete and the point sensor box was replaced.

In the Vehicle Assembly Building, stacking of the STS-115 solid rocket boosters continues. Mating of the left aft center segment was completed Thursday, and the left forward center segment is scheduled to be lifted into high bay No. 3.

Processing of the external fuel tank, ET-118, continues in the Vehicle Assembly Building. Workers from the Michoud Assembly Facility in Louisiana are at KSC and will remove and replace the tank's liquid hydrogen engine cutoff sensors, or fuel gauges, next week.

Endeavour (OV-105)

Powered-up system testing continues on Endeavour in Orbiter Processing Facility bay 2 following an extensive modification period. Mass spectrometer leak checks were performed this week on the system that provides nitrogen to the crew cabin. Work continues on the orbiter boom sensor system manipulator positioning mechanisms, which are the pedestals that support the boom. Hydrogen tank No. 4 was installed. There are a total of five oxygen tanks and five hydrogen tanks that supply the fuel cells in the orbiter.

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