Testing tools, inspection of complete MIR-station

Hooking up power, data and fluid connections between the S0 truss and the newly installed S1

Installing a video camera on the hull of the Unity node; connecting fluid lines leading to the S1's ammonia tank assembly; finish removing launch locks holding the CETA cart in place; installing 25 of 31 "spool positioning devices"

Performing some final outfitting and configuring of the new S1 truss and free a stuck bolt on the station's mobile railcar

Prepare connecting mechanisms for Kibo and the exposed facility, which the station's robotic arm will install later in the day. They also released bolts on an ammonia tank assembly as get-ahead work for the next shuttle mission, STS-128. Then, both worked to deploy the unpressurized cargo carrier attachment system (UCCAS) on the Port 3 truss that was jammed and couldn't be done on STS-119. The UCCAS will be used in the future to store equipment and supplies on the outside of the station.

Transport of spare parts from a cargo carrier to a stowage platform on the station's truss. These parts include: an antenna, a pump module and a rail mechanism that allows a transporter to move up and down the truss. They also relocated a grapple bar onto an ammonia tank assembly as a get-ahead for the STS-129 mission, targeted for November 2009. A planned installation of a camera on the Japanese Experiment Facility was postponed to a future EVA for want of time.

Preparing the exposed facility for experiment transfers and replace two out of the six batteries (four were planned) on the port side truss where they are housed to provide power for the truss.