They installed a power extension cable between the Unity and Tranquility nodes to provide a contingency power source. The spacewalkers moved the failed ammonia pump module from an attachment bracket to a stowage platform adjacent to the Quest airlock. They next replaced a guide for the rail cart system used for moving cargo along the truss.

The astronauts removed thermal insulation from a platform. Bowen then installed a camera assembly on the Dextre robot.