Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

Astronauts used this training unit to practice removing and replacing the Hubble Space Telescope's Power Control Unit (PCU) in orbit. The PCU is the telescope's power relay station; it distributes energy from the solar arrays to batteries, other electrical components, and scientific instruments and regulates the power for all operations.

The original PCU was replaced on Space Shuttle mission STS-109 in 2002. During replacement, the telescope was completely turned off for the first time. The work took place during the 6-hour 48-minute-long third spacewalk of this servicing mission. Astronaut Rick Linnehan methodically disconnected most of the 36 cables in a precisely timed order. Then crewmate John Grunsfeld finished removing the old unit and installed the new one, reconnecting the cables in reverse sequence. Use of the trainer prepared the crew to do this crucial task accurately and efficiently to restore power as quickly as possible.

NASA transferred this trainer to the Museum after the fifth and final Hubble Space Telescope servicing mission was completed in 2009.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type EQUIPMENT-Training Devices Dimensions 3-D: 121.9 × 106.7 × 195.6cm (48 × 42 × 77 in.)
 Materials Acrylic, aluminum, various metals and plastics
 Inventory Number A20120158000 Credit Line Transferred from the National Aeronautics and Space Administration Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.