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good morning from mission control

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houston and welcome to space station

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live

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right now all eyes on the external

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portions of the international space

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station following thursday's

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identification of an ammonia coolant

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leak

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and uh we were seeing wheels i was back

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in the docking compartment looking it

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sounds like i'm just talking to dom and

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chrysler something backed up completely

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but they saw a very steady stream of

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flakes

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or bits coming out of

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common pure nature and then rotating

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towards the forward

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you know as the

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as the truss is rotating they were

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coming out cleanly and repeatably enough

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that it looked like it was a point

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the final verdict being in the area that

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it's in brought it to being either the

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pfcs or the pump flow control system

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located out on the

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external portion of the station's p6

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truss

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that pfcs contains

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many of the control mechanisms to drive

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the coolant flow

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along that truss section of the

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international space station

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that one of the suspected coolant leaks

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uh right now inside the nbl is uh two of

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our future expedition crew members uh

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nasa astronaut terry virts and east

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astronaut samantha cristo ferretti are

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doing a spacewalk run to demonstrate

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many of the techniques that could be

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potentially used

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if this spacewalk tomorrow gets approved

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for two of our astronauts

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again they'll be looking to replace that

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pump and flow control system

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or should that not be the source of the

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leak look to

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investigate some of the internal

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plumbing of the truss structure to see

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if they can identify exactly where it is

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right now on board two expedition 35

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crew members chris cassidy and tom

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marshburn are working to prepare for

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that possible eva

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mission managers here in houston and

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around the globe met earlier this

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morning to

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go over all the data collected thus far

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they will be doing a final decision on

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whether or not the spacewalk is taking

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place later this evening but for now

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giving the crew the go-ahead to begin

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their prep work

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working inside of the

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quest airlock to prepare their emu or

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their extravehicular mobility units

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they'll be doing that throughout their

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day today

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the ammonia leak

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found on board

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yesterday ammonia used to cool all the

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station's power channels this one in

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particular the 2b channel

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it's given its location chris cassidy

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and tom marshburn already

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veteran spacewalkers having three

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spacewalks a piece on a previous

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spaceflight sts-127 the two of them even

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working tandem for two of those

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very familiar with the areas they were

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out there

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back during that shuttle flight

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replacing a number of batteries for the

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station

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so chosen for this spacewalk they will

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continue to prepare their suits should

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they get the final go-ahead to conduct

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this spacewalk tomorrow

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however the the station continues to

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operate normally otherwise

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as this

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ammonia continues to slowly deplete from

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the the power channel identified as the

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2b power channel

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the thermal systems and the cooling

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thermal system controllers here in

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mission control houston are

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gradually or seamlessly

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transferring all the systems on that 2b

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power

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loop over to the 2a

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making sure that there are no impacts to

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station systems again the crew