"Jim Oberg" wrote in message
...
Last night at ~6:14pm EDT, the Lab CDRA (Carbon Dioxide Removal
Assembly) failed due to a check valve in adsorbent/desiccant bed #2 stuck
open. This is a known failure mode of CDRA. With the Russian Vozdukh
also
down, there is currently no automatic CO2 control. The CDRA will remain
deactivated until after the EVA, at which time it will be restarted in
single-bed mode until the check valve reseats, allowing return to dual-bed
ops. CO2 levels will remain well below limits during the time the system
is
off.

At what point do they get desperate and start hitting the stuck check valve
with a wrench? :-)

Only half kidding though. There are times when a bit of percussive
maintenance is in order.

Jeff
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