Rick Mastracchio attached fluid lines to the new Ammonia Tank Assembly (ATA) mounted on the International Space Station’s truss. He then assisted fellow spacewalker Clay Anderson in removing micrometeoroid debris shields from a stowage platform by the Quest Airlock for return to Earth.
Now, the pair now will remove a handle from the old ATA, which is suspended at the end of the space station robotic arm. Once that’s done, arm drivers Jim Dutton and Stephanie Wilson will move the old ATA toward Discovery’s payload bay, where Mastracchio and Anderson will bolt the it in place.