Spacewalkers on truss in center of picture. Credit: NASA TV
No ammonia shower this time! Spacewalkers Doug Wheelock and Tracy Caldwell were the astronauts making the second attempt to repair the faulty ammonia cooling pump located on the S1 Truss. This is no easy task. They completed the disassembly of the coolant lines, and safely removed the faulty pump which was then stored on the Mobile Base System payload bracket. The rest of the spacewalk was used to prepare the replacement pump for its installation. That bit of business will take place on a third spacewalk, currently scheduled for Monday August 16. This spacewalk lasted over seven hours.
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