The 200th space station spacewalk was completed successfully. The installations, repairs, and maintenance activities are detailed below.
Expedition 51 Commander Peggy Whitson and Flight Engineer Jack Fischer of NASA concluded their spacewalk at 1:21 p.m. EDT. During the spacewalk, which lasted just over four hours, the two astronauts successfully replaced a large avionics box that supplies electricity and data connections to the science experiments.
The astronauts also completed additional tasks to install a connector that will route data to the Alpha Magnetic Spectrometer, repair insulation at the connecting point of the Japanese robotic arm, and install a protective shield on the Pressurized Mating Adapter-3. This adapter will host a new international docking port for the arrival of commercial crew spacecraft.
Spacewalkers have now spent a total of 1,247 hours and 55 minutes working outside the station during 200 spacewalks in support of assembly and maintenance of the orbiting laboratory. The first spacewalk in support of International Space Station assembly and maintenance was conducted on Dec. 7, 1998, by NASA astronauts Jerry Ross and Jim Newman during space shuttle Endeavour’s STS-88 mission. Astronauts completed attaching and outfitting of the first two components of the station, the Russian Zarya module and the U.S. Unity module.
Here are highlights from an earlier article the same day:
The 200th spacewalk aboard the International Space Station began this morning at 9:08 a.m. EDT for a spacewalk planned to last about four hours.
Managers in mission control decided to shorten the spacewalk from the original six and a half hour plan, due to available battery power for the spacesuits. During earlier spacewalk preparations, Whitson and Fischer shared a service and cooling umbilical (SCU) after a small water leak was detected in a second SCU that was connected the Fischer’s suit. This was not a leak in Fischer’s suit. The SCU is an airlock component used to provide electricity, cooling and communications to the crew while performing their pre-breathe activities in the Equipment Lock. The sharing of the SCU resulted in additional draw in battery power from the suits during preparations while in the Equipment Lock, reducing the battery power available for use during the spacewalk.
During the abbreviated spacewalk, Expedition 51 Commander Peggy Whitson and Flight Engineer Jack Fischer of NASA will tackle the principle objective to replace a large avionics box that supplies electricity and data connections to the science experiments, and replacement hardware stored outside the station. The ExPRESS Carrier Avionics, or ExPCA is located on the starboard 3 truss of the station on one of the depots housing critical spare parts.
Watch the spacewalk on NASA TV and on the agency’s website.
Whitson is wearing the suit with red stripes as extravehicular crew member 1 (EV 1). Fischer, extravehicular crew member 2 (EV 2), is wearing the suit with no stripes.
Here, this article details the final preparations, as the two astronauts embark upon this historical spacewalk:
Whitson and Fischer will replace a large avionics box that supplies electricity and data connections to the science experiments, and replacement hardware stored outside the station. The ExPRESS Carrier Avionics, or ExPCA is located on the starboard 3 truss of the station on one of the depots housing critical spare parts. It will be replaced with a unit delivered to the station last month aboard the Orbital ATK Cygnus cargo spacecraft.
This will be the 200th spacewalk in support of space station assembly and maintenance. Whitson, who already holds the U.S. record for most spacewalks by a female astronaut, will make this ninth excursion as extravehicular crew member 1, wearing the suit with red stripes. Fischer, extravehicular crew member 2, will wear the suit with no stripes on his first-ever spacewalk.
For more information about the International Space Station, visit www.nasa.gov/station.
Written By: Mark Garcia NASA
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