Removing locks from the S5 that secure it during launch and lock it in place, relocating a radiator from its launch position to the bottom of the S5 to provide clearance for solar arrays to track the sun.

Moving a failed control moment gyroscope (CMG-3) to ESP-2, a new platform, ESP-3, was added to the station, disconnecting ESP-3 power cables to prepare it for permanent relocation to the station

Preparing for the relocation of the P6 truss segment on the STS-120 mission, moving two equipment carts from the right to left side of the station and relocating an antenna and upgrade avionics and communication systems.

The crew inside removed a new ammonia tank from shuttle's payload bay and temporarily stowed it on the station. Next, the pair installed a grapple bar to the new ammonia tank on the station's truss. The pair also replaced a failed gyroscope that is part of the station's navigation system.

The astronauts removed the empty ammonia tank from the station's truss and temporarily stowed it on an equipment cart. The new tank then was installed and connected to the truss for use.

First they finished the complicated change out of the large ammonia tank assembly. The spacewalkers also removed the grapple bar from the old ammonia tank and stowed it on a spare parts platform.

The EVA mainly focused on disconnecting the failed loop A pump module from its location on the Starboard 1 (S1) Truss - including the infamously difficult ammonia disconnections.

They removed a spare pump module from the ESP-3 and installed it on the Starboard 1 (S1) Truss.

The astronauts replaced a backup multiplexer-demultiplexer (MDM) that failed during routine testing April 11, 2014.