Finishing crane mounting, repairing works

Installing a new hydrogen vent valve on the hull of the Zvezda Service Module to bypass a similar valve that is clogged; recovering a thruster residue collection device from Zvezda, retrieving a contamination monitoring device and a package of biology experiments and reposition a cable for a navigation antenna on the aft end of Zvezda; replacing a camera on the station's Mobile Base System

Installing items of hardware in preparation for future ISS assembly work and set up for deployment a number of instruments and experiments mounted on the outside of the station

The two astronauts ventured outside the space station's Quest airlock to install the first of two international docking adapters (IDAs) onto Pressurized Mating Adapter-2 (PMA-2), located on the forward end of the Harmony module.

Working on the port side of the orbiting complex's backbone, or truss (ITS), the astronauts retracted a thermal radiator that is part of the station's cooling system. The radiator is a backup that had been deployed previously as part of an effort to fix an ammonia coolant leak. They also tightened struts on a solar array joint, and installed the first of several enhanced high-definition television cameras that will be used to monitor activities outside the station, including the comings and goings of visiting cargo and crew vehicles.