Spacewalker Alvin Drew installed a light on the Crew Equipment Translation Aid cart and affixed insulation to a valve module fluid line on a left hand truss segment radiator beam.
Spacewalker Steve Bowen installed a lens cover on the station robotic arm's elbow joint camera, which will protect the lens from erosion that might be caused by visiting spacecraft thrusters.
During space shuttle Discovery's final spaceflight, the STS-133 crew members will take important spare parts to the International Space Station along with the Express Logistics Carrier-4.
Steve Bowen replaced Tim Kopra as Mission Specialist 2 following a bicycle injury on Jan. 15 that prohibited Kopra from supporting the launch window.
Bowen last flew on Atlantis in May 2010 as part of the STS-132 crew.
Flying on the STS-133 mission will make Bowen the first astronaut ever to fly on consecutive missions.
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