They replaced a blown fuse and installed a new high definition camera on the starboard truss of the station.
During the spacewalk, which lasted six hours and 49 minutes, the duo of Expedition 53 Commander Randy Bresnik and Joe Acaba, Flight Engineer at NASA, worked quickly and were able to complete several "get ahead" tasks, Melanie Whiting from NASA wrote in a blogpost.
Acaba greased the new end effector on the robotic arm of the Space Station.
"He nearly finished prep work on the second, but that work will be completed by future spacewalkers," Whiting said.
This was the fifth spacewalk of Bresnik's career - 32 hours total spacewalking - and the third for Acaba - 19 hours and 46 minutes total spacewalking.
Space station crew members have conducted 205 spacewalks in support of assembly and maintenance of the orbiting laboratory. Spacewalkers have now spent a total of 53 days, six hours and 25 minutes working outside the station.