deepest love to michelle crag barak, kelly, and the sixth, irrepressible grandchildren whom she helped to raise. >> and so loved and in whom her kind and gentle spirit lives on marion robinson was 86 the skis cnn breaking news hello everyone. thank you for joining me. i'm alison chemla radha in for fredricka whitfield today. so we do have breaking news out of florida, nasa officials are expected to speak soon. this will be the first time that they're speaking since rubbing the launch of boeing's historic starliner test flight today, an automatic hold stopped the countdown clock with less than four minutes to go. >> the two astronauts who were headed to the space station are now back at crew quarters after leaving the capsule. a short time ago cnn space and defense correspondent kristin fisher is live from the kennedy space center for us. so kristen as you explain to us, while we were all waiting and watching and hoping this what happened, this potential launch has been in the making for years it has been nasa first awarded these contracts, dueling contracts the boeing and spacex back in 2014, and they said, hey, we essentially want to outsource the transportation of our astronauts to kristinn. hold hold that thought for a second. here is the presser that we've been waiting for from nasa officials to find out what they started off. busy day for an asset, the international space station. we had a progress talking 88 progress, the morning at 6:43 a.m. eastern time. so the progress docked nominally and the station is doing well at the same time as progress. of course, it's always busy. we got into the launch countdown today turned out to whether it was a beautiful day to go launch. we were worried about the onshore winds and those held within limits. they were right at about 14 knots. and so we are those with an example for launch today. we had a great chance to go look at the helium leak in the service module, what we call the p2 de to flange and manifold three and the port doghouse are manifold two and the port doghouse. and we looked at that leak today and that lake looked like it was about half of what we saw before so we talked about it being on the order of 80 psi per minute. and that manifold today it looked like it was around 40 psi per minute. so that leak we think maybe the ceo moved a little bit or the defect got sealed up a little bit. so that was good and that would have been no issue for launch. so we went through our whole troubleshooting procedure that would have been just fine i would say that the launch vehicle did great. the atlas and center did great the self regulating valve that we talked about we're worried about a little bit going into the countdown performed. well, we didn't see any residents and also that went really well. we did have a couple of items that we worked in accounting and turiel talk more about those we had we stopped in the topping phase on the center or we had a little bit of a failure on the ground. sayyed, i would say in the command and control system for those vowels that are on the ground and the ui team did a magnificent job working through that. we got into good configuration there. and then right before we got into the final phase of the count went off of ground power on to spacecraft power. we saw a little bit of a swap in the cabin fan, a little voltage sag the ground team did a great job of troubleshooting that we verified both fans were good and we got those in a good config for launch. and then of course we got inside four minutes and then we had a problem with the ground launch sequencer and a notorious talk more about that i know it's a little disappointing. we were all excited and butch and sunny, we're excited to go fly. this is the way spaceflight is. i've been, this is my 37th year at nasa today. and i've been doing this human spaceflight for thank thank you. long, long time. and every time you go to the pad for a crewed flight, or really any flight, you've got a chance of scrubbing. so the team did took the right steps. we weren't really to go today. and turiel talk more about that. and i'll turn it over to mark nappi now all right. thanks, everybody for coming out this afternoon the spacecraft and the launch team did a great job today. the spacecraft performed extremely well. steve talks about the helium system it turned out that the when the system was brought up, the team looked at the information really quickly got us the leak rates and ended up being no action required so that's what we expected on the cabin, on the suit fans as we went from ground power to spacecraft power or slight increase in voltage. >> we have a fault detection system that pick that up. >> it did what it was supposed to do, and it turned the fans off. our team, reacted just like they're supposed to very quickly and they cycled them back on again. so that work just as we would like it to for tomorrow or whenever we try our next our next launch attempt, will have that figured out and will we'll either let the same thing happen and see if there's the same voltage or we'll just go in and turn them off and turn it back on again. so the team's work in that and we're fine for the next attempt we're in a 24 hour scrub turnaround and we're trying to preserve that opportunity and will stand by while you i lay does their troubleshooting, and then we'll take either that opportunity or the next one to come like steve said, this is the business that we're in everything's got to work perfectly, like we've talked before. today, we've got really close it didn't work for us. the team's very professional. their in their 24 hour scrub work turnaround right now and when we're ready to go, there'll be ready to go i'll turn it over to tori thanks. >> marc. >> well, as steve said, the vehicle performed beautifully and we really had nothing to talk about on the vehicle itself. >> i also felt that the nasa you will a boeing teams work really well together, which is important as well during account, we had two events on the ground system, specifically that system that is is housed inside the shelter at the base of the pad. so when you see the rocket rollout to the pad and the p vans continue going into a building. it's in that building that we're talking about. these events are associated with the controllers. they large computers that are housed in that building. there's three of them. they're the same, they're redundant, so it's triple redundant. the first event that we talked about had to do with the ground side topping vowels that one of those three racks was not commanding them to be open when we want wanted them to be open it is triple redundant, so we never had an issue with crew safety or with safety to the vehicle. but we worked through it and we switch the primary control to a different of the three racks, which is acceptable for that system. and so topping continued and we'd never really deviated from that. as we get down to terminal count. then we do a health check of other systems one of the key systems there is an different card in the three racks that controls what is referred to as the launch sequencer and that's a computer that controls retract things like retracting umbilicals and the pira events that release the bolts at the base of the rockets so that when ignition happens, the rocket is free to fly away and do its job and for that system, we do require all three systems to be running triple redundancy and to assure that each of those three big racks, those three big computers, do a health check they monitor to see that those cards came up when they were commanded to come up and begin doing their job to came up normally, the third one came up, but it was slow to come up and that trip to red line that created an automatic cold because although the health system did not note that it came up a nominalised sli. it took longer. and so something is not correct. this is an instantaneous launch window for us because of the unique crew safety trajectory we fly we're not able to use are famous ran steering like we do and we take cargo to the space station and so as a result of that, that late in the count that ended up scrubbing the mission what will happen next is to gain physical access to that computer and determine why that occurred. we can't get in there until we're done. you know, de fueling the rocket which is followed by making sure there's no stray hydrogen inside that building. so that's safe for people to be there then we'll go in. we'll troubleshoot it. so we are probably not less than say, three or four hours from understanding what occurred and if it's as simple as replacing a card, we have spares for everything and we would do that we would test it, which is required, and then be in a position to support a recycle for tomorrow. if it's more involved than that, or it just takes longer to get through all of that then we would move to the backup de on the fifth and as you know, we're set up for backup on the range on the sixth as well, whether for all three of those days, look good. and so we'll know more much, much later this evening i'll three of them. okay. so for those in the room, raise your hand. wait for a microphone to get to you and then for those on the phone you can get into the question queue by pressing star one. so marsha, go ahead over here marcia dunn associated press for tori, it sounds like a hard ware issue. >> is that you're the best guess or what's your leading suspects at this point with his third computer? >> yeah, the leading suspect would be either a hardware problem or a problem with the network communication between these between the three computers in the system that interrogates them. but we won't really know until we get physical access and and troubleshoot that one rack that has this one card that came up slow okay, over here, right behind marsha thanks chris davenport with the washington post tare when you're talking about a card, i wonder if you'd get a little bit more information about what you're talking about in terms of that, if that's what that entails. thanks so you should imagine a large rack that is a big computer where the functions of the computer as a controller, we called a rick are broken up separately into individual cards, are printed wire circuit boards with their logic devices. >> so they're all stand alone, but together it's an integrated controller, which is what rick is integrated controller and we do that to make it easier to troubleshoot them into swap out parts so that you can replace just one element of it without having to replace the whole thing. it also helps an isolating which part of that control system is having a problem? indeed, it does. so you would imagine sort of three big racks side-by-side in this building with mult like 15 to 20 cards in them. i don't remember the exact count. and what we're gonna do tonight is we're going to go in there and troubleshoot the cards will likely have to remove several to evaluate everything, including the chassis, the power supplies the network communication between them and isolate exactly why that happened we have one in the third row there yes mark or admin with talking space. >> so a question for tori. >> how many people will be hands-on on looking at the equipment directly in front of it. >> how big is that team how many people will be in the shelter doing the physical troubleshooting tonight? >> i don't know off top my head, probably half a dozen folks will be in there they'll also be lots of people supporting them both here and back in denver, the design team will stay on and work through the evening with it to get to the bottom of it cassie, three in the room right now, then we'll go to the phones. >> go ahead jeff house spacings rhetoric. >> is there a connection between the issue you saw with the topping valves earlier and then the issued. then when you came out of the ti minus four hold, is it the same computer, the same card, something like that? >> sure it's different cards. but the same rack are the same rick, if he will large computer. so they might not be related because they're remember i said the cards are separated by function but on the other hand, if it's something common in the com system, or the network within that rack or its power supply, then it could be, i won't know until we get hands onto tonight and then troubleshoot it okay. >> you've been listening to officials. there at nassau explain what the problem was that scrubbed the launch of this starliner. >> there was supposed to happen today at about 12:30 and within four minutes or less than four minutes before takeoff, they scrubbed the mission. >> let's bring in our space corresponding kristin fisher, who has been on the ground. there all day for us and understands all of this stuff so much better than the rest of us do so this was a computer problem, is that what they said christen yeah. >> so at the base of the launchpad, there's a large structure. it looks kinda like a shed and inside are three huge computers and this is all part of the ground launch sequencer that's the computer that essentially is responsible for we're conducting the automated launch of the atlas five rocket with the boeing starliner spacecraft on top. >> and so what they're explaining in this press conference is that during once they went into terminal count, which is when it's right before those final few minutes before liftoff and it's when the ground launch sequencer essentially takes over at that point in time, there are three computers doing this work, and so you just heard tony bruno, who is the head of ull, essentially saying that they want triple dandan see so all three of those computers have to work together perfectly in order to give this rocket the green light to launch punch two of those computers showed no problems and worked perfectly fine. but there was an issue some kind of issue and we still don't know what exactly it is with that third computer. and so unlikely, just one chip within that third computer. and so now what's going to happen is it's going to to take about three to four hours before about half a dozen people from the united launch alliance can get out there and actually get there hands on this hardware, on this computer, on these individual cards and see what exactly went wrong. and the reason they have to wait i said about three to four hours just because they've got to get rid of all the fuel that is inside that rocket because it is so highly flammable. so what does this mean well we just don't know yet in terms of when they're going to try again. >> once they're able to figure out the problem, it's a chance they could recycle it and they could try again tomorrow at about 12:05 p.m. eastern time. >> if it's as simple fix just like replacing one of those cards here and there. but if it's something more involved something more complex than they might have to wait to those next backup dates. >> june 5, june 6, but alison they just said at that prescott conference that they have backup cards replacement cards on play on hand right here. so if it is a simple affixes swapping out few cards, then yeah, we could see them try again tomorrow, but it's just too soon to say exactly when it's going to go. but some good information mission there from nasa, boeing, and the united launch alliance. but i think it's really important for folks to remember that this is not a boeing issue would appeal here's despite all the issues and there have been many issues with the boeing starliner spacecraft over the years. this is an issue that was caused by the united launch alliances computers that power the atlas five rocket and propels the boeing starliner spacecraft into orbit. in terms of how they're feeling, allison steve stich to is one of the nasa managers here. he said, it is a little bit disappointing, but this is kind of the way spaceflight is and he's right. i mean, these kinds of things, if it's not the whether it's the software or it's a faulty sensor, or it's a sticky valve. i mean, those are the little teeny tiny things that always tend to lead to these scrubs and they do happen all the time, but they are especially careful and cautious for a first crewed test flight like this 111 all right kristin fisher, we will hope to see you back here. >> same time tomorrow. if they're going to try again, thanks so much for all the information all right. meanwhile, crews are working to restore water and atlanta after multiple water main breaks in the city when will the water be back in functioning? >> that's night of. >> new, cnn original series first violin with me have schreiber, it's hard to imagine the power mother nature swallowed by secrets and spies, unclear game back-to-back premier starts tomorrow at nine on cnn kinda riva support your brain health. >> very janet, hey eddie, know, fraser, franck, franck, bread. how are you brad fuel up to seven 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