April 29, 2011

Allard Beutel Kennedy Space Center, Fla 321-867-2468 allard beutel@nasa gov

Joshua Buck Headquarters, Washington 202-358-1100 jbuck@nasa gov

Kyle Herring Johnson Space Center, Houston 281-483-5111 kyle j herring@nasa gov

RELEASE: 11-130

NASA RESETS SHUTTLE ENDEAVOUR'S LAUNCH FOR NO EARLIER THAN MAY 2

WASHINGTON -- NASA managers met Friday to discuss the status of space shuttle Endeavour's launch to the International Space Station The launch was postponed because of a heater issue associated with the shuttle's hydraulic power system The next launch attempt will be no earlier than May 2

The shuttle has three Auxiliary Power Units (APUs) that provide hydraulic power to steer the vehicle during ascent and entry NASA launch commit criteria and flight rules require all three APUs to be fully operational for launch

Endeavour's external fuel tank was drained of more than 500,000 gallons of liquid hydrogen and oxygen so engineers can access the area Saturday and evaluate the issue with APU 1

For the latest information about the STS-134 mission and its crew, visit:

http://www nasa gov/shuttle

For information about the International Space Station, visit:

http://www nasa gov/station

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