wrote "i am still hoping for a miracle. but hmm, good night, daddy." for the world it's a mystery. but for @gorgeous, it's a dad who's not there to tweet her back. jeanne moos, cnn, new york. >> thanks so much for watching. anderson starts now. good evening, everyone. it is 8:00 p.m. ear in new york, 8:00 a.m. in kuala lumpur and perth, australia. as we speak the search for malaysian airlines flight 370 is on again a search for the plane and answers and the clues that only the wreckage and the boeing 777's data recorders can provide. before that, investigators have a new and intriguing piece of evidence to consider. one last partial communication or attempted communication between the plane and a satellite overhead. it came several minutes after the final confirmed ping at 8:11 on the morning in question with plane and satellite trying to

connect again at 8:19. this would suggest the plane stayed in the air longer, potentially making already massive search area even larger. that's the significance. the other breaking news, a high tech navy sense or for picking up pings from the plane's black boxes landed in perth a short time ago but will take several sailing days to get into position and can't do its job until the debris field itself is located. >> i heard it described earlier today we're not trying to find the needle in the haystack trying to find the haystack. we're trying to find the farm the haystack's on right now. >> that search is erased with the pingers only good for about another 13 days and the weather changing daily. there is a window of time, an opportunity for getting the job done, a window of time that is closing. there are limits as well of human endurance and patience. relatives and friend of the 150 chinese nationals aboard flight 370 went to the malaysian embassy last night in beijing demanding answers.

this is incredibly rather to have a public demonstration like this on the streets of beijing. david mckenzie is there on the streets there tonight. kyung lah is in perth. kyung, what kind of aircraft are up in the air right now and how are conditions in the search area? >> reporter: we can actually hear the turbo props of a p 3 orion right behind me. it is going to take off shortly. the australian military says that representing a number of other countries all zooming to this area right now. it's a variety of planes, some military planes, some civilian planes, a total of 12 planes in the air including a p 8 poseidon u.s. plane. that's a high tech military plane that has radar, that has a number of search teams aboard. and they're all looking for that piece of debris, that evidence. the hard part is as you mentioned the weather, anderson. the weather conditions are not ideal. the clouds are still quite low. but they are certainly improved

enough that they want to take to the air again, anderson. >> we're going to talk to a u.s. naval commander in a short ti amount of time. david mckenzie, for respect for the families we're not showing of pictures of them in anguish. but today it's a different scene. they were out in a show of strength on the streets, protesting to the malaysian embassy, public protests with signs obviously welcoming cameras there. we're showing our viewers those images. the families are still not getting the kind of information they want, though, correct? >> reporter: no, anderson, they're not. they want the information that will give them closure in this agonizing matter. they want to get debris, some proof, some physical proof. as you say they streamed out of the hotel where they've been held up for several weeks now and went onto the street, on foot, carrying placards, wearing t-shirts all the way to the malaysian embassy. some of them were able to breach that embassy.

they were shouting out they wanted evidence, answers, closure, pointing at the malaysian government for a lack of information. also many of them angry that they got this information in text messages that the plane had gone down, often in english which they couldn't understand. so you can really see the sense of this pressure cooker here in china with these families just wanting news, wanting some kind of closure, anderson. >> did malaysian officials, anybody from the embassy actually talk to the families? >> reporter: well, the police, the chinese police both plain-clothed and uniformed police, kept reporters very far from the scene around 100 meters from the scene of the malaysian embassy. so we weren't able to see what exactly went down inside the embassy. what is clear, that as you say, very rare to allow a public demonstration here in beijing in china at the center of the communist party. i have to stress this, the authorities were allowing this

protest. this wouldn't have happened in really any other instance like this. and it at least shows tacit approval or at least that the government here is on a tight rope having to deal with this rising anger from the families. but they present a very strong, profound moral voice now. the chinese governments saying they're sending an envoy to malaysia to help with the investigation. unclear how involved they will get. but certainly this is potentially a powder keg between these two countries. these angry families that are just suffering through this anguish. >> kyung, yesterday it wasn't just the planes which weren't flying, the australian naval vessel which was in the search waters had to leave the area because of the swells, the height swells. i assume that is also back in the region. >> reporter: you're absolutely right. it is steaming to a destination. that is what is different today. for the first time, this

australian naval vessel has a goal. remember we were telling you about the debris on monday. debris spotted by an australian plane. green or gray or orange. they dropped a beacon. this australiaen naval vessel now knows it has a place to go. it's going to try to find that debris, pull it out and bring it back for those families. the problem is because of all the weather yesterday they're not sure if that beacon is next to that debris or not. so they are steaming to that area and they're going to try to recover it, anderson. >> kyung, thanks very much. david mckenzie as well. let's bring in our panel. cnn safety analyst david soucie, author of "why planes crash". cnn aviation correspondent richard quest who originally flew in the cockpit of a malaysian airlines 777 with flight 370's first officer weeks before the crash. cnn analyst, and director of

special projects at the woods hull ocean graphic institution. richard, let's talk about this partial handshake. up until today, everybody believed this last communication occurred what, at 8:11 a.m. now it seems there was another at least attempt to communicate later on, a few minutes later. >> right. and if you read what they say about that partial handshake in the inmarsat report that was released today, inmarsat basically said they couldn't say what it was. they couldn't say whether anything really about it. and they needed to investigate it further. now tonight, the inmarsat spokesman speaking -- writing in the "wall street journal" is saying they can say it wasn't human intervention. >> it was not a human attempting to communicate. >> correct. it was not a human that was activating the acars system. it was not a deliberate human act. so that leaves a range of options on the table as to why,

how, we'll have views on that. but how or why this half ping is relevant. but if they can prove the integrity of that half ping, then it adds one more if you like dot in the chain and you start to now know a little bit more about where the plane went down. because you're no longer -- you've got another point of reference. and you can coordinate that with how much fuel there was and what point you believe the plane would have been in. >> let me say it's great to have you back on cnn though not under these circumstances certainly. what do you make of this so-called partial ping? >> i think it's very significant, anderson. we're talk about hourly pings or hand shakes, whichever term you like, the device, the acars, glorified text messaging machine which spit out an hourly

handshake with the machine saying are you there i'm there that's it. suddenly eight minutes after the last one -- remember these were hourly updates. eight minutes after we get a partial ping, whatever that means. you have to -- this is the last time we hear from the aircraft. so you have to wonder what was going on that might have spiked the electrical surge perhaps to reawaken that acars machine. did one of the engines run out of fuel? did that change the electrical distribution causing a surge? there there an impingement, impact, grk forces that might he caused this partial handshake. i think it's a very significant thing. most importantly seems to be a good place to be searching. >> david soucie, the idea this could have been some sort of electrical surge of an engine shutting off or even salt water the plane actually ending in the war. >> the acars box, the thing that collects all the data and then it puts that together in a

tangible message, something that can be read by the satellite and then by the receiver. them that takes this wire that takes it all the way back to the satcom system. that satcom system, transmitter, box and antenna is all located in the top of the aircraft towards the rear back of the fuselage. so what i suspect might have happened here -- of course it's a shot in the dark as to what happened -- if there were a disruption to the acars box which hasn't been sending signals. it's the satcom system that's been communicating. at this point if something happened in the front that would have made an electrical sent here that would trigger the satcom to begin transmitting. similar to if there's an emergency early on when it made its report at 1:07 we were curious why it didn't make the 1:37 one.

after 1:07 the acars system would have triggered the same tee vi device to communicate. >> more than seven hours between the last acars and then this final communication, or attempted communication. seven hours. that mystery what was going on for those seven hours in that aircraft. david gallo, how optimistic are you at this point? you co-led the search for air france flight 447. you confirmed debris after a couple of days, a few days. started to retrieve debris on day five. still took five years to obtain the flight recorders. we're in the third week of this and still no debris. >> anderson, i talked with my co-leaders on that air france 447 search. we think this is a game changer. this is the lucky break. >> explain that. >> because the key for air trans447 was the last known position. then there were a few other

clues that we used after that. but having an idea where the last known position is, even if it's fairly sloppy, means that's a great place to start. and i couldn't agree more. i agree with miles completely. we need to be over there. we need to take a closer look at it. but what a great place to start. and the sooner to better to start the underwater search. >> richard? >> because this thinping is proy more significant than the other ones, bearing in mind the time that we know that the plane would have gone down or run out of fuel. this isn't like one of the other pings where you've got an hour before the next check in with this ping, the investigators will be able to narrow down, as miles was saying, the timing of it. this gives you a much closer -- potentially a much closer range of timings. so you can pinpoint much more intensely where it was likely to be. still vast distances, anderson, to be sure. but more intensely. and miles, i just want to go

back to a point you made earlier. it's also possible that even the impact of the plane could have caused this ping? >> yeah. it's hard to say for sure, of course. but there's any number of scenarios you could come up with that would sort of reactivate that box in some way to have it try to communicate with that satellite. whatever it was it was probably some sort of power surge. what would cause that? i think the first suspect would be the flame out of the engine. that's not going to be the exact spot necessarily where it went down. the other engine would be going for a little while but not much longer. but certainly you talk about trying to find the haystack. that's probably where the haystack is. >> we're going to be turning to our panel members throughout the hour tonight and live at 11:00 to midnight tonight. let us know what you think. coming up next with heavy indian ocean waves like these subsiding, this is what it has looked like in past years. give you a sense how rough it can be out there. search resuming this hour.

we'll check in with the u.s. seventh fleet on its role, talk to commander marks of the seventh fleet. later breaking news in the grim search back home in the united states in washington. additional victims have now been located in washington state in that landslide. making matters worse, what we learned today about just how foreseeable and avoidable this disaster may have been. ameriprise asked people a simple question: can you keep your lifestyle in retirement? i don't want to think about the alternative. i don't even know how to answer that. i mean, no one knows how long their money is going to last. i try not to worry, but you worry. what happens when your paychecks stop? because everyone has retirement questions. ameriprise created the exclusive confident retirement approach. to get the real answers you need. start building your confident retirement today.

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and a 30-tablet free trial. the was a truly amazing day. without angie's list, i don't know if we could have found all the services we needed for our riley. for over 18 years we've helped people take care of the things that matter most. join today at angieslist.com way again after delay due to weather conditions like we've seen in the past years. film from new zealand navy. called the roaring 40s because of the fearsome wind, waves and ocean currents found there. today we're told conditions have improved.

for the latest i want to check in with commander marks. the poseidon 8 had been down for scheduled maintenance, wasn't searching the area. is it back up today? has it already gone out? >> we are will be today, anderson. we have a flight leaving here in a couple of hours. that's our p 8 poseidon heading southwest there to the search area. one point i want to make is that when our p 8 leaves today, i just got the list of participating countries here that have aviation assets in perth. china, south korea, japan, india, australia, the u.s. and more. that's an encouraging fact to put out there. that all these countries are working together. so yes, the p 8 is ready to go today. we're in support of the australian-led sector assignment. but i want to emphasize just one

little piece of an incredible international effort. >> can you give me a sense of what it's like out there, given the varying weather conditions? how low are the aircraft flying to actually try to get a visual on debris? >> sure. yesterday as you know was a pretty rough day for environments here for the weather. but these planes, at least our planes and the u.s. navy, it's an all-weather aircraft. and so the the pilots are the best in the business. but the people in the back, those tactile coordinators are the experts that determine what sensors they use depending on the weather and the environment. so for example, we can use the range from radar, surface search radar to infrared to the electroop cal sensor to getting real low to get a visual. so if it's a clear day, things are looking great, it will fly in that maybe 5,000-foot range.

use the full spectrum of sensors. get a good surface search. then if you do get a ping on the radar, can drop lower to get an electric t electrooptical. you can actually fly really low in that 300-foot range. and get underneath that cloud layer. you can just look with the binoculars. so we do have a full spectrum of sensors. it is all-weather capable. so this is a pretty advanced plan. and like i keep saying, if we fly over any piece of debris we're going to see what it is. >> it's amazing you can fly 300 feet. i didn't realize so low. the navy is moving into the area the toed ping or locater and something called the blue fin. can you describe what each does? >> sure. these are going to be some pretty critical pieces of equipment, we hope.

i say we hope, because you really need a good sense of location before we deploy these. one is the tpl 25. that's the today piad pinger lo. hydrophone. can go down to a depth of about 20,000 feet and just liston any sound it here is. so if that black box is down there and it's within range, it will hear it. the key point being there in range. these black boxes don't have a huge range. maybe a couple thousand meters. so you really have to have a good sense of where this thing is. otherwise if we're on the wrong spot we'll never hear it. just to give you an example to draw a picture of how huge a challenge this is, even if this debris was moving at half a knot an hour, so .5 nautical miles an

hour, over the course of 16, 17 days we're still talking hundreds of miles. so that's what -- we need to get the first planes out there to get the best location we can. so then our toad pinger locater c can nnt can listen in the right spot. >> commander marks, thanks for taking the time to talk to us. thank you. for more now on the hydrophones, essentially water microphones, stephanie elam joins us from a boat off the pacific coast off santa barbara, california. stephanie? >> reporter: aernderson, it is interesting technology and a difficult task. james coleman is a senior hydrographer and show us the difference between this and sonar. how does this work? >> this is a hydrophone. there's a number of varieties of hydrophones. basically it's an underwater

microphone. this is the type of device are going to be using either towed behind a boat in long tails or in order to listen for that underwater pinger. >> how far can it hear? how wide? >> only about five miles. >> so this is how you're trying to find the basic area of where any flat data recorder might be. >> exactly. you need to find the wreck site. >> so if we go from there, let's take a look at the sonar. because the sonar is what you're going to do if you get closer or if that battery dice on that flight data recorder. >> so this is an example of the sonar. the sonar is going to actively e met sound down to the sea floor. as it receives the signal coming fwak from the sea floor it's going to interpret that and build up a 3d map of what's on the bottom. so this device is used to map out what's on the sea floor. >> you've got to be right on top of it for that to work. >> yes. >> let's look how this data is translating starting off with the data from the hydrophone and how that looks when you basically let this computer hear

what it's picking up. >> the hydrophone you could put on your ears and listen for what's in the ocean, the one-second click from the pinger. you could look at it visually. this is a spectrum or the noise in the ocean. ocean noise here on the boat. if that pinger were nearby we'd see a sharp spike at the 30 to 40 kill hertz once a second on the display. >> while that's one bit of data coming in, you have this data coming in which is the sonar, correct? >> exactly. this is the mapping sonar. we're looking below the boat. we're getting that information that comes back to interpret what's on the sea floor. we're building up a 3d point cloud of the information that's on the sea floor as well as a visual display of what's down there. we have a pipeline, a tire and different obstructions. >> so you can see that. and this put all together can tell you let's go back and take a look at it. it's really great technology. but unless you're right there, anderson, you won't be able to pick this information up. you have to go through and look at this data very slowly. >> stephanie, how long does it

take to scans an area of the ocean floor? >> reporter: that's one biggest pegsly in the southern indian ocean because it is so deep there. you've got to work to get this equipment as low as possible down to the ocean floor. and then trailing it behind you. think about how long that cable is going to be. trailing that behind you. you can't go too far or too fast because you might lose something, lose a connection. so you're talking about painstakingly slow work to go through the ocean. especially when you have not really a good idea where it is. it takes a very long time. so that explains why this process has been so long in the southern indian ocean, anderson. >> stephanie, thanks very much for the demonstration. you can find out more on the search for flight 370 at cnn.com. just ahead we'll drill down on one theory what happened to the plane, the ghost plane theory, that flight 370 was on auto pilot for much of the final journey. plus the breaking news in the search for dozens of people

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more break news tonight. search teams in rural washington state have found more victims of the catastrophic land slide. we do not yet know how many more. they're combing a mile-square debris field.

on saturday morning, a massive chunk of a mountain collapsed and within seconds a wall of mud buried everything in it path. here are two 911 calls that have been released. >> we have a freaking mudslide. all i see is dirt. we watched hundreds of trees come falling out of -- i'm on sea post road highway 030. and there's not even a house here anymore. >> are there any injuries? >> yes. there's people yelling for help. >> my neighbor's house and their neighbor's house have been completely taken out. and it's collapsed on several of them. they're trapped. >> you know they'red inside th home still? >> yes. i'm standing in the location right now and i can hear them tapping underneath and yelling at us. >> tapping underneath. 14 people are confirmed dead. that does not include the victims found today. again we don't know the number. last night as many as 176 people

were listed as missing or unaccounted for. on saturday searchers found this 4-year-old boy stuck in the thick mud. they had to pull him out of his pants to free him to get him out of there. tonight hope of finding any more survivors is fading. as i mentioned, more victims found in the past few hours. george howell is in darrington, washington he joins us now. more victims. what are authorities telling you? what's the latest? >> reporter: anderson, we expect to learn more. we'll ask the questions of course about those victims in a news conference later tonight. this information is important. many families as you know are waiting for word. they're holding out home. but today we spoke with one family that does not need word. they already know. >> if you've seen the maps and you've seen the extent of the devastation and the consistency of the mud, i can tell you with great soundness they're not going to find my parents or my daughter or her fiance.

i really feel that they're gone. >> reporter: it's almost like planning a funeral for loved ones but without any proof or real knowledge that they've died. nick kobe web ri nicole rivera is beyond hope that her loved ones are still afive. >> it might be weeks or ever if they find our people. so today is the first day that we're getting there. we're going to go and just be with our people and grieve together. >> reporter: their only focus now toys come together as a family for nicole that means getting as close to her parents and daughter as possible. their home undoubtedly demolished in the disaster zone. so they allowed us to follow them to the place where nicole grew up in darrington, arriving at a community shelter this family find some comfort. >> it's just fabulous to be with people from the community and see how they're all supporting each other, to hold people that knew my daughter. she was a cheerleader at darrington high school in 2010.

it's just good. it's healing. >> reporter: they came here to see these volunteers, offering help to other families who have been affected. and to ask simple but now complicated questions. nicole's aunt wants to know how to close her brother's affairs. >> what do i do now? what if they don't recover my brother's body? what do i do? >> reporter: amongst all the uncertainty, the decisions and wondering, they reflect on a bit of solace. >> it would be great to get a body. but i understand. if we can't we can't they're in the right spot. they actually had plans to have a family funeral plot on their place. my brother and sister love that place. so if they had to go and stay. >> it's extraordinary. the strength of this family, all them being together and saying they just want to be close to their people. i talked george to nicole

yesterday on this program. she said two reasons that she was speaking out. one, she wanted to thank publicly all the volunteers and all the rescue workers who are out there. in many cases risking their own lives because the conditions can be very treacherous still for those searchers. and also to let people know just of the impact this one landslide has had on this whole community. this a very small close-knit community, george. >> reporter: absolutely. and that's really the reason they came here, aerpd aernderso. they wanted to see it, to be back home, to see the volunteers working, to be closer to their family's home. and also keep in mind, this was a difficult day for them. the next several days will be difficult. when you consider the size and scope of what happened in this mudslide, officials say it could take weeks before they're able to clear the mud, before they're able to find bodies. and of course, to notify the families. >> our thoughts and our prayers are certainly with nicole and all the other families out

there. she's waiting for word on her parents, her daughter and her daughter's fiance. it's unthinkable one family's loss. up next with so many questions remaining about flight 370 we're going to take a look at one of the theories that investigators are looking at. the so-called ghost plane theory that the jet somehow flew on auto pilot for hours after the passengers and crew perhaps were unconscious. that's one theory that investigators have. we'll see what that would look like from inside a flight simulator. also ahead from the black boxes may not solve this mystery even if they are found. details ahead. i have a cold with this annoying runny nose. [ sniffles ] i better take something. [ male announcer ] dayquil cold and flu doesn't treat all that. it doesn't? [ male announcer ] alka-seltzer plus fights your worst cold symptoms plus has a fast-acting antihistamine. oh, what a relief it is! plus has a fast-acting antihistamine. transferred money from his before larry instantly bank of america savings account to his merrill edge retirement account. before he opened his first hot chocolate stand calling winter an "underserved season". and before he quit his friend's leaf-raking business for "not offering a 401k."

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as the search continues for any wreckage of flight 370, so continues the search for answers. the big question still looming what happened to this plane. the mystery has led to a lot of different avenues for investigators. right now we want to take a close look at the so-called ghost plane theory that everyone on board was perhaps unconscious because of loss of pressurization or smoke from a fire and then the plane continued to fly for hours on auto pilot until it ran out of fuel. that's one scenario investigators are examining. it happens very rarely. it does happen. it has happened. so we're going to martin savidge to see what that might look like from the flight simulator. martin, explain that idea what it would look like due to a loss of pressurization or some other incident. >> reporter: ghost plane, zombie plane, plane without a brain. it would begin with maybe some kind of an alarm that would go off. could be fire, could be sudden

decompression. either way. we're simplifying this greatly. pilot mitchell here puts it into a very steep descent. at the same time the aircraft begins to turn. the idea you want to get this plane heading back to some airport. we were over water at the time so either back to kuala lumpur or the closest near by. but you're descending primarily because you've only got so much oxygen. pilots would already have their emergency oxygen on board. if it's a sudden decompression, the passengers have had the masks flopped down in front of them. they only get about ten minutes. you've got to get down quickly to an altitude where people can breathe. in this case we're saying 12,000, but even per would be about 10,000 feet. but for the scenario you stabilize. you get the aircraft back into a reasonable position. you level off. you've apparently figured out it's not that severe. and somehow you get it on automatic pilot. or you put it on automatic pilot and you're overcome either by smoke or simply lack of oxygen.

you pass out, passengers pass out. airplane's got plenty of fuel. it's on a predemmtermined cours. it will now fly for hours until eventually it runs out of fuel. that's the scenario. we don't know if it really happened that way. many speculate it could have. >> miles o'brien, the plane did make several turns. so would that be possible under an auto pilot scenario? >> you would have to put in the way-points for those turns. that given the scenario you just laid out is highly unlikely. what that pilot would have done is exactly what marty and his friend -- i'm sorry spacing on his name -- >> mitchell. >> -- mitchell did in the simulator. they would turn around do, a 180, head back to land, get down to 10,000 feet as quickly as possible. if they were overcome the plane would just continue on that heading. what we see from the inmarsat data that was released today are two additional turns.

two additional turns. one sends them up to the northwest, the other one sends them down to the south to the area where we're searching. so in the heat of that battle as it were, would they have put in extra waypoints or stored waypoints? even those stored waypoints didn't make any sense or take him to an airport close by. unfortunately that's where this theory tend to fall down. there must have been something else going on. >> and richard, as you look at the map and you and i were looking at it, it does look as if there's an argument to be made that the plane was perhaps trying to avoid indonesian air space. >> yes. if you actually look at the map an running the animation now, that turn that miles was talking about to the northwest and then to the south, it's not just a -- that last turn south appears to avoid indonesian air space dlindli

deliberately or going over land indonesia. if you were in extremis you're going over malaysia and there are air spaces where you can land. and secondly there are plenty of places with the may day call that you could have landed in indonesia. and then you've got this southwest or south turn before you get this long journey down into the south indian ocean. so the ghost plane theory is there, and helios in 2005 did exactly that. the pilots became overcome. everybody was overcome except for one flight attendant who managed to get to the cockpit. they scrambled, in cyprus, this scrambled fighters. and the fighters actually watched the plane all the way to the ground. they watched the engines flame out. on both sides. then they watched it go into the mountainside. so was on auto pilot but an

example what would have happened. >> martin savidge, if a plane runs out of fuel as is believed happened here, how does a plane this size enter the water? are there different scenarios? is it a glide down? one engine loses power before the next? >> reporter: right. these are things we've been trying to simulate. put it into like neutral if you will and we'll sort of show you. we can't shut the engines off. the simulator doesn't allow that. it would do all sorts of computer problems. but we have tried this. put the engines completely in neutral. take the plane off of auto pilot. and then you let go of the controls. the aircraft is designed and engineered, this is true of many aircraft, it's built to fly. even though the engines are no longer running in this scenario, the plane is designed to be level and controlled and to make a low descent. we are doing that very slow and gradual. now again, it's a simulator. so of course the engines, it's

possible one would flame out after the other. mitchell believes that actually one engine if it's still running would compensate automatically for that, right? >> yeah. we have a thrust asymmetric compensator in the 777. so yes, in the event of an engine failure, any asimilymmet cross will be. any airplane big or small most of the time it's going to be designed to be stable. >> we're still descending, still going down, still level. it's possible you could wing over and die. >> miles, the thing about this is that no matter what theory you look at that investigators are looking at, there are holes in each one. there are questions that can be raised that don't make it obvious what happened. >> yeah. we don't have any clearcut here. i'd like the guys in the simulator to try one idea if they would. let's assume the left engine is the first engine to be started

generally. that's the custom. let's assume the left engine flamed out first. if you guys could put it -- let's go with the 12,000-foot altitude which we've been talking about. i don't believe a lot of these altitude numbers we've been hearing about. so put it on auto pilot, 12,000 feet. give it asymmetrical thrust with the right engine going and left engine off. i'm curious if the auto pilot has enough authority to compensate for that asymmetrical thrust. in other words, if one engine is going full gun, the other one's down, will the auto pilot still hold heading or will it disengage and will the plane start turning to the left? this would be very helpful for searchers. because we know at that point, let's say we had that last partial handshake, if that's what happened, they lost one engine, we could get an idea of how far it might be able to fly on one engine, and if in fact it would stay on heading.

that's all useful information that might help us. >> mitchell, do we know? >> i can try here. it would take some time. >> it's going to take us time because we're at 22,000 feet. >> another 10,000 feet. >> what's your sense of what might happen? do you know, mitchell? >> yeah. the thrust asymmetric compensator, if there was electrical power in the airplane then it would compensate. that's what it's designed to do. but we don't know fit had electrical power. that's the key question. >> we'll be on at the 11:00 hour. we'll try that out. appreciate our panel being with us. martin savidge, mitchell, richard quest, miles o'brien. searchers racing to find the data recorders, so-called black boxes before they start pinging. the question will they actually help solve the mystery? some questions on that ahead. ng, marching band playing ] [ male announcer ] the rhythm of life. [ whistle blowing ] where do you hear that beat? campbell's healthy request soup lets you hear it in your heart. [ basketball bouncing ] heart healthy.

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led to the one jobhing you always wanted. at university of phoenix, we believe every education- not just ours- should be built around the career that you want. imagine that. if the search in the indian ocean turns up some debris, the voice data recorder could be the key to soflg the mystery. even if those black boxes are found they may not solve.

>> reporter: this is the sound of a pilot in trouble. that was the pilot of swissair flight 111 talking to air traffic control just minutes before he crashed into the atlantic ocean in 1998. everyone on board was killed. when crash investigators found the plane's black boxes at the bottom of the ocean, they were stunned. >> both the recorders stopped recording about six minutes before the aircraft actually hit the water. >> reporter: leaving investigators to wonder why they suddenly lost control of the plane. it was a fire, they later found, in the jet's entertainment system which also caused the black boxes to fail. but it took putting the plane back together, all 2 million pieces of it, to figure that out. bottom line, the so-called black boxes aren't perfect. and they're not black, either. they're usually orange. on an airplane they're tucked inside an insulated case and

surrounded by stainless steel. they're built to withstand temperatures as high as 2,000 degrees fahrenheit and catastrophic impact. after twa flight 800 went down in july 1996, just 12 minutes after takeoff from new york's jfk airport, the plane's black boxes were recovered but they offered little. >> both the voice recorder and the data recorder terminated their operation within a nano second of each other. when the explosion took place. >> reporter: still, despite all the conspiracy theories investigators say they figured out an explosion in the fuel tank caused the the crash and shut down the recorders. >> on 9/11, 64 people died onboard american airlines flight 77 when it slammed into the pentagon. fire crews spent days trying to put out the flames. the two black boxes were found in the wreckage, but the cockpit

voice recorder was too charred to offer anything of value. >> it flew in with such force, and the fire was so intense, that nothing could have survived that impact. >> reporter: if the black boxes are ever recovered from malaysia airlines flight 370, investigators still may have questions. the cockpit voice regarder starts recording over itself after two hours. so the moment something went very wrong may remain a mystery. randi kaye, cnn, new york. >> david gallo joins me now. he co-led the search for air france flight 447. he's he's with the woods hull oceanographic institution. with that crash you weren't able to find the black boxes before the pings ran out of batteries. how much more difficult was it to locate the plane because of this? were you searching in the darkness at 13,000 feet below sea level? >> literally in the darkness,

sure. but figuratively, not so much, anderson. that's a world we're familiar with. so we were making maps of the bottom and eventually found that wreck. and then from there we went into intensive phase of survey of the wreck itself, so nares and cameras. and handed those images over. it's a method of step-by-step systematic mapping and there they were. >> by then to find the black boxes submersibles with robotic arms that basically just pick apart the wreckage? >> exactly, anderson. so to find the aircraft we used sonars, made maps with sound using robots like underwater drones. but then to work the wreck site we used an rob,receipt re/*

/* -- remotely operated camera. >> and then on that, did the black box still have the recording of what occurred in the moment when the plane started going down? had it -- i think from the time the plane started going down to the time it hit the water it was relatively quick, right? >> four minutes. so the surprising thing there was that it had been two years that those boxes were at about 4,000 meters depth. so 2 1/2 miles depth. we had no idea whether the information would still be there. but anderson, in this day and age with the right robots, and we've got those robots and the right sensors, they exist as well, you can do a crime scene analysis at depth at a wreck like air france 447. you can look at every surface, the cockpit, the panels, the landing gear, the flaps. whatever the investigators want to look at you can look at. >> that's remarkable. david gallo, appreciate it. thanks very much. we'll be right back. [ male announcer ] this is the cat that drank the milk... [ meows ]

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that's it for us. thanks for watching. see you again at 11:00 p.m. eastern. live edition of "ac 360." "piers morgan live" starts now. this is cnn breaking news. >> this is "piers morgan live." breaking news. the search is back on in the southern indian ocean.