scene composition: litho, frame 22
May 13, 2013
Categories: ISS

American astronauts Thomas Marschburn and Chris Cassidy went to the open space to determine the leak point of ammonia in the cooling system and probably to replace the pump that is the source of ammonia leak.

The astronauts detached PFCS (Power Flow Control Subassembly) pump block that is supposed to be the source of leak and examined the assembly in search for the leak point. Earlier in the process of detachments the astronauts found some “ammonia flakes” but this fact didn’t allow to judge about the leak point. “The place we removed PFCS block from looks very clean” – Cassidy says.

Cassidy and Marschburn transferred the block removed to the storing place and installed the spare pump block of ISS cooling system.

The spare pump block operates properly, the astronauts haven’t recoded any ammonia leak since the new block was installed.

More from this category:
5At4ZROehnc
December 19, 2014

Russian Soyuz-ST booster with Fregat-MT upper stage and four European 03b satellites  to provide internet communication for the distant parts of the world was successfully…

full story
5099634131
July 13, 2016

We are making apologize for not posting news for such a long period. Our specialists went to Baikonur spaceport to watch new Soyuz MS spacecraft…

full story
Roskosmos_Sergey_Prokopev
August 30, 2018

The Progress-MS-08 cargo ship was brought down from orbit after a one-week experiment “Izgib” and flooded in a non-navigable area of ​​the Pacific Ocean. The…

full story
3152694649
February 10, 2015

Beijing saw the first meeting of interstate Committee on Russian and Chinese satellite navigation. The decision to form the Committee was taken in October 2014…

full story
Ustanovka na PU
October 20, 2014

At 04:30 on October 18 Proton-M booster Briz-M upper stage and Express-AM6 satellite was transported from fuel servicing area where Briz-M low-pressure tanks were filled…

full story
4786676068
June 18, 2016

Soyuz TMA-19M descent capsule with Roscosmos cosmonaut Yuri Malenchenko, NASA astronaut Timothy Kopra and ESA astronaut Timothy Peake successfully landed in the steppe of Kazakhstan…

full story
station-reboost-maneuver
July 10, 2013

According to the ISS flight schedule station reboost maneuver was carried out on July 10, 2013. In accordance with TSNIIMASH ballistics and navigational support service…

full story
SHL_3220
August 20, 2015

On August 20 the cosmonauts raised flags of the countries taking part in Soyuz TMA-18M spacecraft launch. This traditional ceremony symbolizing final stage of prelaunch…

full story