Mission Specialists Nicholas Patrick and Robert Behnken are conducting the mission’s third and final spacewalk.
The ammonia loops are open. With the cupola now located on its permanent home on Tranquility’s Earth facing port and the Pressurized Mating Adapter 3 on the end of the node, Patrick and Behnken are free to begin getting them into the right configuration. Patrick is connecting the mating adapter’s heater and data cables to Tranquility. Then he will work with Behnken to remove six panels of insulation over the cupola’s windows.
Once the insulation is out of the way, Patrick will be able release the three bolts on each of the seven window’s covers; those bolts held the covers in place during Endeavour’s launch. While he does so, Behnken will get back to outfitting Tranquility by installing four worksite interfaces and five more handrails.