Tool, Door Positioner, Power Control Unit Trainer

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    Tool, Door Positioner, Power Control Unit Trainer

    Blue anodized aluminum bar with a central gold anodized tether loop on one edge and two turnbuckle bolts, one at each end; marked ETU nonflight (Engineering Test or Training Unit). The device can hold the door of the Power Control Unit trainer open at different angles.

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This object is on display in the Moving Beyond Earth exhibition at the National Air and Space Museum in Washington, DC.

This door positioner is part of the training unit that helped astronauts prepare to remove and replace the Hubble Space Telescope's Power Control Unit (PCU) in orbit. This device propped open the door of the electronics bay where the PCU was located while the astronauts worked from a mobile work station attached to the robotic arm. This task occurred on Space Shuttle mission STS-109 in 2002.

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