page_title: STS-127
section_title: Mission milestones
hierarchical_section_title: STS-127 / Mission milestones
caption_attribution_description: English: STS-127 Mission Poster
context_page_description: STS-127 was a NASA Space Shuttle mission to the International Space Station. It was the twenty-third flight of Space Shuttle Endeavour. The primary purpose of the STS-127 mission was to deliver and install the final two components of the Japanese Experiment Module: the Exposed Facility, and the Exposed Section of the Experiment Logistics Module. When Endeavour docked with the ISS on this mission in July 2009, it set a record for the most humans in space at the same time in the same vehicle, the first time thirteen people have been at the station at the same time. It also tied the record of thirteen people in space at any one time.
  The first launch attempt, on 13 June 2009, was scrubbed due to a gaseous hydrogen leak observed during tanking. The Ground Umbilical Carrier Plate on the external fuel tank experienced a potentially hazardous hydrogen gas leak similar to the fault that delayed the Space Shuttle Discovery mission STS-119 in March 2009.
context_section_description: The mission marked:
  158th NASA crewed space flight
  128th Space Shuttle mission
  127th shuttle mission since STS-1
  23rd flight of Space Shuttle Endeavour
  29th shuttle mission to the ISS
  102nd post-Challenger mission
  14th post-Columbia mission
  1st time that two Canadians have been in space at the same moment
caption: Mission poster
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