Mission controllers in Russia were briefly concerned when, for about 20 minutes, communications with the space walkers was lost, Interfax said.
The pair installed a communications antennas and laser reflectors. The new gear will be used to guide a new automated cargo capsule developed by the European Space Agency into the station's aft docking port. The first of the large cargo craft is scheduled for launching next fall.
Padalka, the station's commander, and Fincke, the flight engineer and science officer, are slated to wind up a six-month stay aboard the outpost in October, but not before they undertake two more space walks.