TVIS Inflight Maintenance

ISS028-E-013758 (1 July 2011) --- Russian cosmonauts Sergei Volkov, Expedition 28 flight engineer; and Andrey Borisenko (mostly out of frame at left), commander, perform in-flight maintenance on the Treadmill Vibration Isolation System (TVIS) in the Zvezda Service Module of the International Space Station.