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Expedition 8 Replaces Parts in Elektron

    Submitted by Arthur - N1ORC - Amsat #31468

*Expedition 8 Replaces Parts in Elektron 
The Expedition 8 crew spent the week repairing the Elektron oxygen 
generation system and conducting experiments aboard the International 
Space Station. Commander Michael Foale and Flight Engineer Alexander 
Kaleri replaced a liquids unit Thursday and a water flow system Friday.

The Elektron has been suffering from shutdowns that occur after only a 
few minutes of service. Russian flight controllers believe the cause of 
the shutdowns was potassium hydroxide electrolytes -- a byproduct of the 
oxygen generation process -- that created air bubbles in the liquids 
unit. Flight controllers are scheduled to activate the Elektron on 

While the Elektron was offline during the troubleshooting efforts, the 
crew used solid-fuel oxygen generation (SFOG) canisters to create 
oxygen. If the Elektron does not come back online, the SFOG canisters 
and the Quest Airlock </station/assembly/elements/airlock/index.html> 
tanks can supply the ISS with oxygen for several months.

Also on Friday, Foale conducted a leak check of the Destiny Laboratory 
</station/assembly/elements/uslab/index.html>'s Earth observation 
window. The check revealed a leak in one of the window's inner panes. 
The leak poses no threat to ISS operations.

The crew replaced a flex hose a few weeks ago on the window assembly 
that was responsible for a slight pressure decay in late December.

The crew conducted several biomedical experiments and exercised on the 
treadmill, which was overhauled last week.

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