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>> Kelly Humphries: Hi,

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and welcome to Mission
Control Houston.

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Welcome with me today
Dina Contella,

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one of our flight
director team members

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for the International
Space Station.

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A veteran spacewalk
or EVA officer

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because she became
a flight director,

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and somebody who's been working

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with the troubleshooting
activities on the spacesuit

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that we had trouble with on July
16 when Luca Parmitano had a lot

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of water fill up in his helmet,

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and she's been working
very closely

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with the team that's pulling
together the troubleshooting

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activities, and trying to figure
out exactly what happened there.

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Dina, even though this
was a Labor Day weekend,

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the Space Station crew did do
quite a bit of work on Saturday.

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Primarily troubleshooting
the problem with the helmet

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and the water supplies that got

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into the helmet from
the spacesuit.

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The spacewalk was cut short,
but everybody got inside safe,

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and now we're trying to
figure out what happened.

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What did the crew do over
the weekend this weekend?

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>> Dina Contella: OK.

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Well, just to back up a
little, prior to this weekend,

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the whole team has been trying
to figure out what the source

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of the problem could be,

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and so the team developed
some procedures on the ground

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to change out some
components of the suit,

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and the idea would be change
some of the components out

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and then retest the suit out
to see if the water continues

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to go into the helmet.

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And so, and the team
worked very hard on that.

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There's, essentially the
problem is probably located

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in this one area of the
life support system,

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that's the backpack
of the spacesuit,

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and there are some
valves that are associated

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with both the water system
and the oxygen system kind

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of in an intimately close area
to each other in proximity

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such that water could get into
the oxygen vent loop system.

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And so the team identified
specifically one valve

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and also a filter that
could have been the cause

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of the issue, and additionally
there was another valve

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that is sort of easy to
change out there, not a valve

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but a component called
the gas trap.

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And so, you know, on the
ground, the technicians

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and the engineers and
ops team all got together

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and got the procedures ready,

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and what the crew did this
weekend was change out of

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that valve, which if
that valve is a problem,

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it could have caused
the flooding.

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Also, the filter,
which if it was clogged

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that could have caused
the flooding, and then,

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like I said, the gas trap.

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And after the first component
and filter were changed out,

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we did a screening where
we tested the suit out,

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buttoned it all up as if it
was preparing for going EVA,

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and then we checked to see
if what was still coming

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in the helmet, which it was, and
then we took the gas trap out

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and put a new one in,
and then we screened

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that also just to make sure.

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We didn't think that was
the cause of the issue,

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but we wanted the gas
trap on the ground anyway.

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So anyway we did all
that troubleshooting,

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and we got helmet, water
in the helmet both times.

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So we have not isolated the
exact component that failed

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yet on Luca's suit, but we did
a lot of good work this weekend

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by recovering those items.

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We bagged them all up
for return on the Soyuz,

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and so on the ground,
the team will be able

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to take really close
up photos and kind

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of pick apart the different
materials that might be

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in those components and
check for mechanical failure

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and those types of things.

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You know, for example,
the gas trap.

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We didn't think it was
the source of the problem,

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but it has a really
fine mesh screen on it.

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So if there was kind of anything
interesting in the water

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that was going through
the gas trap, it's water

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and gas combined, then that
might collect some evidence

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that would be on the screen.

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So we did a lot of
great work this weekend,

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although we haven't specifically
isolated that exact cause,

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and we're really
excited to get some

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of that hardware
back on the ground.

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>> Kelly Humphries: OK.

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So you're doing everything
it sounds like, but one thing

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at a time to try and
isolate what's going on.

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Has it been tough to
pinpoint this issue?

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>> Dina Contella: It is
actually pretty hard.

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There are a few items that
are in close proximity

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to each other, and
so trying to figure

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out which one those it could
be has been one of the issues,

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but it's also not, you
can't really drive your EMU

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over to the gas station and have
the mechanic take a look at it

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because really the
technicians are really experts

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at this very intricate type
work that it takes to work

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in the life support system, and
all of their work is done here

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on the ground without
zero g type of hindrance

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to having small little
screws and other things.

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They have a lot on the
ground that they can do

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that we don't necessarily
easily can translate basically

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onto on-orbit activities.

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So, for example, we have
one component of the suit.

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It's a combination of fan,
water separator, and pump,

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and that particular item, it
would be great if we could get

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that particular component
back on the ground, too,

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but it's much more
difficult to change out.

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So it's hard to pinpoint the
issue when you can't just go

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and grab items off the suit

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and then have your experts
take a look at them.

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It takes a lot of effort to get
some of those components out.

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>> Kelly Humphries: Well, and
the crew members have a lot

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of training in how to operate
their suits but maybe not

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so much [inaudible] how to
maintain them, but maybe not

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as much in troubleshooting,
and so you're trying

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to give them really good
procedures to get all this done,

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and everything's a
little bit harder to do

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in zero g, too, right.

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>> Dina Contella: Exactly.

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And so the, you know, as an
example, the work that we did

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over the weekend, there's some
very small tiny screws that,

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you know, we didn't
want to have get lost.

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So we set up some mesh over the
end of a vacuum cleaner to try

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to catch some of those
components, but the development

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of all of that type of stuff you
don't want the crew necessarily

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to try to do it themselves.

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We like to try to give them
the best techniques possible

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since they've never laid
eyes on the hardware.

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So trying to translate what
these expert technicians are

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doing on the ground into
something that can be done

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in zero g is just, I mean,
it takes quite a bit of work.

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>> Kelly Humphries: OK.

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Well, now, there's a formal
mishap investigation board

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that's been formed to
look at this issue.

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So why do we need the crew to
do all this troubleshooting now?

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>> Dina Contella: OK.

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Well, you know, the mishap
investigation board is kind

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of an independent review,

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but Space Station ops
continue every day.

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So the crew is doing science
every day, and there's vehicles

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that are coming and
going, and there's a lot

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of potential contingencies
or off-nominal situations

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that could crop up that
would require a spacewalk.

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And so should one of these crop
up, we would like to be ready

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to say that we understand
what the failure is

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and what we would do in case
the water was starting to come

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into the helmet again
such that we would be able

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to say we might be able to
go out and perform an EVA

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in an off-nominal situation.

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So while the mishap
investigation board is working

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that, at the same
time we're trying

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to understand how we
could get to the point

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where we could say we could go
and do it, perform another EVA,

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working on the operation
procedures for the crew

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in case it happened again.

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And additionally, we're working

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with the mishap investigation
board on the gathering

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of the evidence in
bringing it to the ground.

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This is good information that
they need as well as, you know,

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as the rest of us, I'd say
maybe the Space Station team

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in general is all trying to
collect the same evidence,

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and the mishap investigation
board is hand in hand wanting

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that same information.

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So working hand in hand,
but they're doing more

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of an independent review.

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>> Kelly Humphries: OK.

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To the layman, it seems a little
strange that you'd put the air

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and water systems
so close together

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that they could cross over.

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Can you explain a little, is
that just because you have

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to shrink things down so
small for use in space?

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>> Dina Contella:
Well, the, you know,

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they're intimately tied together
because the spacesuit is cooled

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by water, and the,
so we feed water

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into something called a
sublimator [phonetic],

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and the sublimator
forms a, you know,

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when the water hits the
sublimator in a vacuum,

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it forms a sheet of ice, and
then that ice sublimates off.

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It basically turns to
vapor and immediately

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in that whole process
gives the suit cooling.

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And in addition to cooling
the components of the suit,

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that's used to cool the
crew member's body off,

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and [inaudible] you can see here
there's water in the helmet.

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This is basically what
Luca was experiencing,

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but this is us inside the
cabin doing some testing here.

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But back on the sublimator.

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So that particular loop,
it cools off the oxygen

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that the crew member's breathing
as well, and it condenses,

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for example, your breath has
a little bit of moisture in it

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and your sweat, and
that's the kind of thing.

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So the sublimator helps
to condense that out

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like an air conditioner
a little bit.

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So you can see how the vent
loop and the oxygen loop have

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to be intimately tied together,
and also you can see bubbles

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that would occur potentially
in your cooling loop system,

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and you want to get the bubbles
out and, hence, the gas trap.

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So there's a few ways in
which they're tied together,

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and we have to use the
water to cool the oxygen,

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and we use a water separator
specifically to separate,

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because you keep those two
separate, water and oxygen.

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In this particular case,
though, the water separator,

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it's I guess theorized that the
water separator allowed flooding

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to go into the vent loop
in this particular case,

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but what the root cause is
we're, is still unknown.

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>> Kelly Humphries: OK.

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And we were looking at
that picture of the helmet,

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and basically the air that
circulates in the helmet comes

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over the back of the head,

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and that's what we
were looking at there.

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>> Dina Contella: Exactly -

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>> Kelly Humphries: So -

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>> Dina Contella: Because the
water actually was basically

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entering at that point
and coming up over the top

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of the head in this
particular case.

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It also comes around the
sides, and, you know,

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it [inaudible] the
geometry of the vent pad.

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>> Kelly Humphries: OK.

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So how big of a team
is working on this?

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Sounds like you guys didn't
get a full Labor Day weekend.

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>> Dina Contella:
Well, that's true.

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So we've been working on
this for quite some time

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over the course of
several weeks.

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I'd say the majority of the team
is really the spacesuit team.

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Of course, other
disciplines are affected

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like our life support system
officers and things like that,

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but our operations team
and our engineering team

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and all those expert
spacesuit technicians that,

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as I mentioned have been
working several weeks in a row,

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and we wanted to give everyone
Labor Day weekend off, but,

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unfortunately, the way the
crew's scheduling and all

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of our science worked
out, we really wanted

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to do those operations
on Saturday.

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So we did have a lot of
the key individuals here

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in the control center on
Saturday, and then we had

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to do a little bit of maybe I'd
call it telework or, you know,

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work from home on
Sunday, but we have tried,

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we did try to give
the folks Monday off.

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>> Kelly Humphries:
Well, that's good.

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Let's change gears here a little
bit, and I know you're not

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as in the middle
of the preparations

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for the cargo vehicle departure
that's coming up tomorrow,

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but can you just kind of give
us an overview while we got you

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here of what it's like
to get a cargo vehicle

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like HTV ready to go?

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>> Dina Contella: OK.

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Well, today is a good example.

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As I walked up, I heard
you talking about the fact

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that we have Luca right
now in the vestibule.

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Essentially, you need to get
everything prepped and ready

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to go between HTV and
the Space Station.

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You know, our Japanese cargo
vehicle and the Space Station.

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So there's this area called
the vestibule in between

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where you have jumpers and hoses
and things that would allow you

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to supply air and power and data
in between the two vehicles.

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So basically you need
to close all that out

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so the HTV can depart,
and additionally you have

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to install some boxes.

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I know they're doing that today
as well where these are boxes

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that would have interfered
with the translation and then

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in between the two vehicles
and putting in, taking cargo in

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and taking cargo out, but
we want to reinstall those.

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Those boxes will help control
the bolting, or the unbolting

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in this particular
case for the release.

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And so I know the crew's
doing that today as well.

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And then overnight the ground
will do some preparations

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for the [inaudible] as
well, and then, of course,

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tomorrow is the release.

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And the crew I know
has been practicing

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as well for the release.

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It's not as big an operation as
the rendezvous and the capture,

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but it still requires some
preparation work on their part.

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>> Kelly Humphries:
And, you know,

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while all this is
going on, we've all,

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we're also getting ready for
three of the crew members

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to come home, and so tell us
a little bit about what it's

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like on board with departure of
a cargo vehicle, getting ready

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to bring yourself home as well
for those three crew members.

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>> Dina Contella: Oh,
they've also been doing a lot

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of packing, and then they still
got some time to go, but they,

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I know they have
a drill tomorrow

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to practice their
descent essentially.

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And Chris I know has packed up
most of all, most of his stuff,

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but there's maybe a
couple last-minute items,

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and as I understand it talking
with [inaudible] director,

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there's sort of a,
you know, bittersweet.

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They're very happy to be
returning, but at the same time,

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they don't want to
leave Space Station.

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So I know they're in
excellent spirits, though,

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and they've been a
really awesome crew.

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So looking forward to the
next crew, but, you know,

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this crew has been
special for us, for sure.

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>> Kelly Humphries: Oh, great.

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Dina Contella, a flight director
and key member of the team

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that is troubleshooting
the spacesuit problem.

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Thanks again for joining
us today, and good luck

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with your continued
work on figuring

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out what's going on there.

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>> Dina Contella:
Thank you very much.

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Hope we solve the problem soon.