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little bit of unscheduled excitement for

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the crew of expedition 42 today onboard

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the International Space Station here to

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tell me a little bit more and update us

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on the current status the program

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manager mr. Mike Suffredini Mike if you

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could start us off just kind of walk us

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through the genesis of what happened

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this morning this morning in about 4:00

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a.m. the systems indicated tests on the

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ground that there were four measurements

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that indicated to off scale and at that

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time the team didn't know what that was

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what the cause of that was and so one of

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those was what we refer to as

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accumulator quantity it's the it's

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basically the water level in one of the

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coolant loops inside the lab and so this

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is important because we have a risk that

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we worry about or at least protect

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against and this has to do with getting

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ammonia into into the crew environment

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so the way we cool the space station is

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we have been ammonia system outside that

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transfers the heat from a water system

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inside and the water system is inside to

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protect the crew you don't want to have

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hazardous chemicals flowing through the

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water loops so we have heat exchangers

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where we exchange the heat between the

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water loop inside pneumonia loop outside

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so that's one location where ammonia can

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leak if you have a failure inside the

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heat exchanger which they're designed to

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prevent you could potentially leak

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ammonia because it's higher pressure

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outside you could leak ammonia into the

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water loop and then there's a path

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through which it can find its way into

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the cabin and so one of the telltale

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signs of a potential ammonia leak would

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be if the accumulator indicated you were

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filling up and and so this failure mode

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that we saw this morning this alarm

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indicated that the accumulator was

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filling up okay

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amongst some other indications but this

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was the one of biggest concern and so

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the team that was the beginning of a

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discussion about are we dealing with a a

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real ammonia leak into the water or not

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now as everyone knows ammonia is a very

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hazardous chemical and so if this is

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possible then we we

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idiot Lee safe the vehicle and get the

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crew in a safe place so the way the

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station is designed we have two main

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segments if you will we have the Russian

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segment which can which houses the

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service module and the FGB and the and

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the ports associated with those two

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modules okay there's an interface

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between that segment Russian segment and

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the forward part of the space station

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called the u.s. operating segment and

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that interfaces at the node and so for

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these kinds of emergencies the specific

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emergency we only have ammonia on the on

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the US OS side of the vehicle okay the

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plan is to have the crew go into the

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Russian segment close the node hatch and

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then we have some steps to take so they

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dawn their mast they get into the

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Russian segment they close the hatch

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they do some drag or tube testing we

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call it to look for ammonia in the

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atmosphere in the Russian segment make

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sure that hasn't been contaminated and

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then the team on the ground begins the

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process of trying to sort through the

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anomaly so that's the steps we took

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because of the indications we had okay

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confusing things a little bit was we

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also saw an increase in pressure in the

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cabin so if you're leaking ammonia into

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the water loop and it eventually finds

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its way into the cabin then you would

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expect the cabin pressure to go up so

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that was another so that's another and

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and those two cues together it's had the

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team really going sort of a conservative

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mode to go protect the crew so we did

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exactly that we got the crew on the mast

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they got to the Russian segment they

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closed the hatch we checked the

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environment and since that time we have

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been sorting through this anomaly and

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act and in fact we did it twice early on

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we sent the crew in because we didn't

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have the confirming queue at least not

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very solid so we had that we had the

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accumulator but not really the pressure

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wasn't changing dramatically but we sent

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the crew to the Russian segment to be

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safe finally decided maybe this is just

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a some sort of Indian problem because so

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many we lost so many measurements at one

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time we let the crew come back into the

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u.s. lab and then shortly after that the

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pressure started to climb in the cabin

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that's a that's a confirming cue and so

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then we went to the procedure the crew

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donned the mask again and went back in

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the Russian side

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and have been there ever since the

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measurements on the Russian segment

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showed no indication the crew is they're

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not they don't have masks on they're

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just in the Russian segment you're doing

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the doing they're the work that they can

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do while they're in there and of course

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we have all the co2 removal oxygen

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generation through all the things in GRU

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needs they have in the Russian segment

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so they're safe there meanwhile in the

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US segment the team has been working

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very hard to try to sort through the

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anomaly at this point the team does not

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believe we leaked ammonia okay so no no

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hard evidence no real indication so far

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than any ammonia well what we what we

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are dealing with is these this failure

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of probably a card inside of one of our

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multiplexer demultiplexer x' it's just a

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computer that the breast since telemetry

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down and brings commands back up and and

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this card has a number of measurements

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on it and those were the measurements we

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lost and through a source of how the

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system's reacted and what happens when

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you isolate the crew and shut off the

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ventilation and and all the things steps

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we take along the way we shut do we

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power down systems with quite a bit of

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things are done we shut off the outside

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big big pump mm-hmm and we depress the

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big pump so it's not providing as much

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pressure to charge push ammonia into the

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into the cabin of course that means we

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have to power things down so lots going

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on and we think there's something in

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that and made the pressure change that

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was you know that kind of gave the team

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a little bit of a question about at the

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time of course it looked like a no

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kidding pressure increasing now we're

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looking at thinking this may just be

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normal reactions to the events that

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start to unfold so the team is working

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through that we are now in a position

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where we think everything's good we but

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now we have this big road in front of us

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to get it back

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reconfigured so we've got the water loop

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up where as soon as we can get the MDM

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released we've done data dumps and stuff

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of the MDM to to know for certain the

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health of the MDM as soon as we can

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release that to the ops team then they

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will power cycle and see if we can

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recover these cards

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it's important because we do want to get

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to look at the accumulated money before

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we bring the crew back in yeah to the US

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segment just to be safe

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so that steps in front of us the pat

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we're doing some power ups now we got

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quite a few systems up actually

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integrating the loop be the external

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loop be into the system is the most

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time-consuming one because you can't

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just flip a switch and have ammonia flow

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through all the heat exchangers now

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because you because of the conditions

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now you can freeze the heat exchanger

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and for sure cause the crack which would

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end up introducing ammonia into the

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system and so that takes a little bit

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longer so we have a couple steps in

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front of us the first is to get the

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power ups done which the team is doing

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or I should say one is to get the powers

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that power ups done that the team is

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working on and the second then is to get

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insight into the accumulator to confirm

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that the system is tight like we believe

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it to be and so we can bring the crew

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back in to the u.s. segment so that's

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where we are right now we would like to

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get the crew back in the u.s. segment

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tonight okay that would be our goal it's

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while it's inconvenient for the crew to

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be in the Russian segment it's certainly

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not unhealthy for them and so we'll do

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due diligence to make sure we're

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comfortable with the environment before

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we send them in there okay so crew kind

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of hanging out in the Russian segment

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right now Mission Control gonna walk

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through powering up a bunch of systems

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just to make sure so a couple of systems

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obviously non-critical systems powered

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down and he impacts to science things

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like that onboard the station with this

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event well there were there were two

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things two things we were trying to do

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today one was I get started with micro

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five which was an experiment we were

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gonna do in the in the micro science

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microgravity Sciences glovebox so people

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probably heard us getting configured

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ready start that so that's been delayed

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but it's not critical we don't lose any

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research the other one that we needed to

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deal with was fruit flies and so this is

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what research is all about and we have

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to have healthy fruit fly so the team's

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off look in it when we needed to feed

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the fruit flies I think we're planning

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to do that today I don't think it's

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required today and so that's part of

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what we need to answer so there were

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some research we were and get started on

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but this of this would be a small blivet

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but it's not

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a major impactive yeah nothing there's

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no certain law or any get done we didn't

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lose any research the the freezers gets

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powered down as part of this which have

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a lot of samples that eventually bring

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home but the freezers is designed to go

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without power for a fairly long period

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of time over eight hours and we were

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well within that and all the freezers

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are back up and running now also the

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research has been all protected and it's

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just we'll have to replan you know that

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tomorrow and the subsequent days but it

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shouldn't result in any losses and one

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of the other thing i want to touch on

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real quick you know so when the team saw

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the indicators they snapped in action it

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was all very quick when they made the

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decisions talk a little bit about you

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know some of the different emergencies

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were that were trained for not only the

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astronauts with the teams on the ground

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and kind of how important it is to get

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that training not only before flight but

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also during flight they're still

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training even while they're up there

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right and this is this is a really

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important aspect because we don't have

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knock on wood we haven't had any really

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major anomalies a little like this that

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caused us to get to the point we were

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concerned about the crews well-being and

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imminent well-being and so but we have

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three major categories anomalies that

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can put us an emergency situation one is

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rapid depress or you could get an impact

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or something that causes us to have a

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depressive en't the the other one is a

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tox issue and of course ammonia falls

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under the tox issue but there's other

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there's other toxins that can occur on

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board but ammonia is though is the one

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that we trained the most for and then

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fire finally is the fire and smoke issue

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and so while fire and ammonia leaks are

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very very very low risk all three of

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these types of anomalies we trained for

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on the ground in an integrated fashion

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with our Russian colleagues with the

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crew and then we actually practice them

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once we get on orbit to keep everybody

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sharp yeah

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these kinds of emergencies start with

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protecting the crew then trying to deal

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with the issue and then if in the end we

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can't deal with the issue that we can

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some of them can result in evacuating

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the station and so all of these steps

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have to be taken care of

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and make sure the crew is real sharp and

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the teams will sharp because if they

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occur in some cases you have very little

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time to take the steps necessary to

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protect the crew so this is something

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that we train regularly and you could

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tell today the team really there was

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never any risk to the crew we were

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watching the data and and trying not to

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isolate him but we we isolated him twice

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pretty fast so if we need to do it we

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know how to do it the crew knows what to

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do and in fact after after they isolate

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themselves a Russian segment butch

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called down and said hey thought

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everything went really well everybody

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was knew their jobs and got him down and

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and so will will debrief that to see if

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there's any lessons learned but it

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seemed like the team as you would would

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expect reacted appropriately to the

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event all right well good to hear a

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happy word from the commander again the

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crews safe inside the Russian segment

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not in any danger

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indicators pointing to no ammonia being

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leaked but obviously the team here in

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Mission Control Houston and that the