ISS Expedition 45: US (33) spacewalk (11/6/15)

Expedition 45 crewmembers Scott Kelly and Kjell Lindgren conducted their second spacewalk outside the International Space Station (ISS) on Friday (Nov. 6), successfully restoring the original configuration of a cooling system and returning the ammonia used as coolant to the desired levels in both the prime and backup systems.

The 7 hour and 48 minute spacewalk, which began at 5:22 a.m. CST (1122 GMT) ended at 1:10 p.m. CST (1910 GMT).

The two astronauts achieved most of the tasks set out for them, but in a departure from the plan, they ran out of time to cinch and cover a spare radiator known as the Trailing Thermal Control Radiator. The radiator, which Lindgren retracted earlier in the spacewalk, was fully redeployed and locked into place in a dormant state.

The radiator had been deployed during a November 2012 spacewalk by astronauts Sunita Williams and Aki Hoshide as they tried to isolate a leak in the port p6 truss' cooling supply by re-plumbing the system to the back-up radiator. The leak persisted and was subsequently traced to a different component that was replaced during a spacewalk in May 2013.

Friday's spacewalk was the 190th EVA in support of the International Space Station. U.S. and Russian crewmembers have now logged a total of 1,192 hours and 4 minutes working outside the orbital outpost.