On August 17, 2017, Russian cosmonauts Fyodor Yurchikhin and Sergey Ryazansky performed the extra vehicle activities (EVA – spacewalk). The cosmonauts launched five small science and technology satellites overboard and spent the rest of the spacewalk servicing external experiments and carrying out routine but time-consuming inspections and maintenance. They also installed 10 temperature sensors on the “Poisk” module and serviced another external experiment. The EVA lasted 7 hours and 34 minutes. It was the 9th EVA overall for Yurchikhin and the 4th for Ryazanskiy.