During the STS-126 mission's third spacewalk, astronauts Steve Bowen and Heidemarie Stefanyshyn-Piper (out of frame) focused their efforts on the continued cleaning of the station's starboard solar alpha rotary joint (SARJ) and the removal and replacement of trundle bearing assemblies.
During the STS-126 mission’s third spacewalk, astronauts Steve Bowen and Heidemarie Stefanyshyn-Piper (out of frame) focused their efforts on the continued cleaning of the station’s starboard solar alpha rotary joint (SARJ) and the removal and replacement of trundle bearing assemblies. They also cleaned the area around the SARJ’s drive lock assemblies, which help the joint to rotate and lock into place.Image Credit: NASA