NASA said the spacewalk, which will be performed by ISS commander Peggy Whitson and flight engineer Dan Tani, will be a fact-finding mission to help determine how to restore the starboard solar array's sun-tracking capability.

The Solar Alpha Rotary Joint and the Beta Gimbal Assembly have been temporarily locked in place while the solar arrays still produce power.

Whitson and Tani completed a procedure review on Friday, NASA said in a release.