Team to reunion island where the debris was found off the coast. The plane took off in march of 2014. Bound for beijing. Now if it turns out this is wreckage from that flight it would be a major discovery. In a search that had gone on nearly 17 months. Randi kaye reports. Reporter march 8, 2014, just after midnight in kuala lumpur, Malaysian Airlines flight 370 takes off bound for beijing. 239 people on board. [ indiscernible ] reporter 40 minutes into the flight, the airplanes transponder suddenly goes dark. The planes transponder is effectively the instrument that send out a signal to air Traffic Control. It tells you what height it is at, which direction and what speed it is traveling. Suddenly, this giant triple 7 is, is blind to the world. Reporter it is the middle of the night. And the plane simply vanishes, no distress call. An air Traffic Control waits two hours before notifying emergency responders. That two hours was incredibly critical towards finding the aircraft and finding if there were survivors. Reporter the search focuses on the South China Sea where the plane fell off the radar. Then shifts to the southern indian ocean where the is believed the plane turned off course. Early on, numerous false leads. Oil slicks in the ocean off vietnam, a floating yellow object thought to be a life raft turns out to be sea trash, and chinese satellite images showing three wide objects floating near the planes last confirmed position. Turns out those images were released by mistake. The search later turns to the southern part of the indian ocean. After new radar and Satellite Communications are analyzed, its believed the planes Communication System was still automatically sending out electronic handshakes to a satellite even though the transponder was dark. This allows authorities to plot its mysterious course. The search area moves again in late march. Mh 370 flew at a higher speed than previously thought which in turn means it used more fuel and could not travel as far. Australian authorities indicated they shifted the search area 1,100 kilometers to the northeast. Reporter high tech listening devices, toad pinger locaters are deployed on the bottom of the sea listening from sound from the pinger attached to the black box. And they peck ick up a signal. The first sign of hope. We have very much narrowed down the search area. And we are very confident that the signals that we are dete detecting are from the black box. Reporter but the signal fade before the black box is located. Autonomous underwater vehicles which map the ocean floor are also used. 22 planes and 19 ships on the hunt. Still no answers. More than 16 months since the disappearance, authorities are still looking for the missing plane. But with much fewer resources. We cant go on forever. But, as long as there are reasonable leads, the search will go on. Reporter this latest discovery perhaps the lead they were waiting for. Randi kaye, cnn, new york. Questions about flight 370 are many and mysterious still. Authorities do not know why the plane turned offcourse. Where it went down, with this new possible discovery, we wanted to take a look at the flight path as we know it. And the kur opportunicurrent. Cnns Richard Quest joins me with that. Knowing what you know about the flight path of mh 370. Does it make sense this debris could travel this far . Oh, absolutely. Absolutely. I am going to show you how, anderson. If i am doing this if a question occurs, jump on in. And ask away. Now as randi kaye made it clear a moment ago. This is what we know happened with the flight plan so fafrmr. T it goes down over indonesia. The plane heads down way into the southern indian ocean. But so far so good. Look at how it actually comes to be shown in terms of the total map. The plane is coming from the top of the south, southeast asia. I am going to draw it down. It then comes down, right the way to here. And about here, is where the best opinion suggests the plane went down. All that can be said is pretty much now thats where the plane. And now look at the western way in which it is believed the currents moved it out toward the west. If we move the map in a bit. You will see from this search zone. You are talking about the the wreckage or if it is part of the plane. Talking about it moving 2,500 miles out toward the western part of the indian ocean. But could the currents have actually done that . That seems to be the question. The answer seems to be quite clearly, yes, they could. These are the five major gires that exist around the world. You have the north pacific. South pacific. North atlantic. Southatlantic. The current that move the debris. They move things around the ocean. You have the indian ocean gire. Look at that. If we put in play, we imagine now what we know anderson about where the search area is. Where the debris would have gone into the water. See, not a leap of faith. Perfectly possible for that debris to have ended up in the fullness of time on the western side of the indian ocean. Yet if theyre so sure if the consensus is thats where the plane went down. The area you first showed. That piece of debris. A large piece of debris. You would thing if it is from the plane there would be other large pieces of debris. So why hasnt anything been found in that search area . If you ask the question. Why hasnt more debris. Lets go back to the map of where this whole thing took place. If you go back to, to this area. The one unknown is why there hasnt been more debris found. In fact, any debris found so far. The standard answer is, that they have got there late. 12 days on. A lot of it had sunk. A lot had just disappeared. But now we start to find. You only need one piece, you get this one piece, that, that may have got into the gire. Over the months. We worked it out. It has to move. Roughly, 10 miles a day in this environment. 10 miles a day. Which if you look at the currents in this part of the world, if you look at them, this is entirely possible that something could go from here and make its way roughly 10 miles a day out to the western side. Will there be more . Is the question. And for that people will be looking. And the question is whether or not they should be sending out searches to look over here and herech the here. These are vast areas. The search zone firmly remains off western australia. That doesnt alter by what we know today. Richard, stay with us. I want to bring in cnn aviation analyst and pilot miles obrien and cnn analyst, david gallo. Miles, what do you make of this. The fact that this debris consistent with the boeing 777. Are there any other 777s that have gone missing or crashed in the indian ocean that we know about . No. A triple 7 part. Check the serial numbers, dot the is, cross the ts. No other missing 777 in the indian ocean. With good confidence, a link to mh370. Not inconsistent with the search area. But the search area is not a bulls eye by any stretch. A region the a very large region that was found by looking at a Communications Satellite data, not a navigational satellite. Actually clever engineering that even put them in the southern indian in the first place. So it is quite possible theyre looking a long way away from where the wreckage is. You still have this piece wash up where it did. They still got to keep searching. We still dont know where. David, you agree it is very possible based on, on simple calculations this debris could have traveled that far after the plane went missing . Absolutely. And, i am wishing i had richard for a professor when i was in graduate school. That would have made it all very easy to understand. But, yeah well within reason. And the question is to backtrack. And im sure, beginning already, there is probably teams of modelers out there trying to figure out where the piece came from so many, 500 some odd days ago. Thats the important part. Where is the, the x marks the spot. Couldnt have come at a better time, anderson. The teams are in for the winter months. The teams, the ships are in. Theyre exhausted. They have been out there. Having been there myself, knowing what it is look to spend months at sea, not find what you are lacking f ilooking for. The boost they need to give them the first tangible evidence there is a plane missing some part in that indian ocean. Riffe ed arichard, arent th numbers in various parts of the debris . They havent said that. I dont know. Wouldnt there be serial numbers some where there. And relatively easy to check serial numbers against record of aircraft . There is lots of serial numbers. Every panel. Every part of the bit. A number on it designed specifically for this eventuality. And all, you have got to get the null were t number. And check it, and microfiche and paper, now it is computerized. You have got to double check it. Guessing between seattle, chicago and malaysia and kuala lumpur and cambra, and paris as well, the bea, the conduit from the reunion out there. Just to take up the point of what david gallo was saying. The area that is currently being searched is 120,000 square kilometers. They searched just less than half of it so far. There is one ship still currently out there. And its been winterized. But david is spot on when he said, reading a report fru the tra report from the australians. It is very difficult. They search one day in every two. Because the weather is so bad at the moment. And in that condition, you have just got to work out, is it possible to have made the 2,500 mile journey. Have the searches been going on all this time . Yeah, they have been plowing through the ocean. And they have been coming up empty. They found a shipwreck. Which was kind of interesting. But there was a lot of discussion most recently about whether the the search technique was not not accurate or precise. That the Company Involved was not doing the job correctly. I think david gallo might have thoughts on that. But they have been plowing through a lot of ocean. The problem is where is that center point . Where is that x marks the spot . And even in the case of air france, 447 as david will tell you it took them a whl ile to figure that out. So in this case with the, i d t dont want to say a wild guess . They reversed engineered a sat lit that wasnt supposed to do that to get you to the point in the southern indian ocean. That doesnt narrow it down enough. David. What do you make of how the search has been going . Have they been doing a good enough job . Anderson, i was prepared to be unimpressed. I have close colleague out there on the ships working with the data. I have seen snippets of it. It is absolutely amazing. They covered the terrain in an organized way. Talked about mowing the lawn they have done that. And the images is spectacular. I think we are pretty sure we know where the plane isnt. I think there is a few places they want to go back and have a closer look at. But we know where the plane isnt, now the question is, where do they move to next president . Same kind of issues we had with air france. We also had the criticism from the peanut gallery saying that, after the first two months coming up emptyhanded we had the wrong equipment. We werent experienced. We were a bun. Of academic nerds. Why are we out there . It is the same criticism. It is horrible. They need confidence from the community not criticism at this point. Certainly, if this is a piece of the wing as you said. This will give them a big boost. David gallo, miles obrien, Richard Quest. All stick around. So many theories what happened to malaysia Airlines Flight 370. From plausible to ridiculous. Well take a look at more plausible ones next. Also tonight donald trump in a new cnn interview with dana bash. The story about the lawyer that called her disgusting for asking to break breast milk years ago during a deposition. Trump blasted the attorney. Dana tried to pin him down on specifics, policy positions. You will hear that interview ahead. 40 of the streetlights in detroit, at one point, did not work. You had some blocks and you had major thoroughfares and corridors that were just totally pitch black. Those things had to change. We wanted to restore our lighting system in the city. You can have the greatest dreams in the world, but unless you can finance those dreams, it doesnt happen. At the time that the bankruptcy filing was done, the Public Lighting Authority had a hard time of finding a bank. Citi did not run away from the table like some other bankers did. Citi had the strength to help us go to the credit markets and raise the money. Its a brighter day in detroit. People can see better when theyre out doing their tasks, young people are moving back in town, the kids are feeling safer while they walk to school. And folks are making investments and the community is moving forward. 40 of the lights were out, but theyre not out for long. Theyre coming back. Its got the spring and bounce of a traditional mattress. You sink into it, but you can still move around. Now that i have a tempurflex, i can finally get a good nights sleep. vo change your sleep. Change your life. Change to tempurpedic. A source saying boeing analyzed photos debris found in the western indian ocean, and seems to be consistent with the 777 like the missing plane. The search has been going on since flight 370 disappeared a year ago. A search that really yielded few answers. Certainly a multitude of theories. Sara sidner reports. Reporter good night, malaysian 370, the last word anyone would ever hear from the illfated flight. Causing unimaginable grief. And unleashing theories from the technical to the sinister. Among them, the pilot crashed the plane on purpose. Investigators looked into whether suicide could have been a reason. Ultimately the International IndependentInvestigation Committee said it found no indications that would cast suspicion on him or the crew. Terrorism. Did some one commandeer or hijack the plane to crash it. Experts are divided on the issue. Hijackers usually have clear demand. That never materialized. And no terrorist group claimed responsibility which led investigators to believe those options are not viable. The plane landed some where. As the months tick by and no pieces of the plane were discovered. Some speculated it was possible the plane had landed. But no communications from the people on board or hijack demand made that seem less possible. Mechanical failure. A theory that a catastrophic electrical or mechanical failure brought the aircraft down is still being considered. Rapid decompression. The plane suddenly loses cabin pressure and the passengers and crew become unconscious. The plane on autopilot flies until it runs out of fuel and crashes. But without more evidence they are all just theories. Leaving grieving families in limbo. Wondering what happened to those they lost. Sara sidner, cnn. In limb bo, joining me, inspector david sousi, and cnn aviation expert david quest and miles obrien. What does it tell you in terms of how and why the plane would crash . It would surprise people it is such a big piece if in fact it w was from the plane . Wouldnt surprise me to have the piece be large if it was an abrupt, strong impact because of the way it is located behind the leading edge of the wing. Leading edge of the wing would have taken that impact whether a skid on, a dictching or in directly. The piece would have been at the trailing edge of the, of the wing and would have, avoided any kind of direct impact. You looked at this closely. Do you believe there is a good chance this is from the plane . I do, anderson the i looked at this. Talked to boeing mechanics today most of the day. There are some things exclusive and unique to the 777 in this model rain bnge. Rules out to me as mild pointed out there have not been any other triple 7 accidents in the indian ocean that would have potentially provided this debris. I am increasingly confident this is a 777 part, yes. Miles, the specific piece of a 777 that was found. When those are deployed, it is usually during a landing, right . If thats the case what does it tell you about what may have happened here . It has a dual function. To bank the aircraft, an aleron, and a flap, thats why they call it a flaperon. For it to be deployed from the back of the wing. A likely scenario. Breaks off cleanly. Either the plane was banking. That would support maybe autopilot stall spin scenarios. Or if it was deployed in the configuration for use as a flap, to slow the plane done that lead you down the road to something nefarious. Was somebody trying to fly the plane in as slowly and gently as possible. Why would somebody try to do that . Well, these as i have said frequently there is no black box for the human mind. Why would somebody potentially, this is one of the theories that are out there, many theories, very few of which can be discounted. One of the theories was that a person on board the aircraft, either a member of the crew or some other individual, wanted this plane to disappear the if you wanted it to go into the ocean, in such a way that it didnt generate a lot of debris, slow it down as much as possible. There have been so many theories what could have happened. Mechanical failure, rapid decompression, pilot suicide. Does the piece of debris if determined from the plane what can be gleaned from it after so long in the ocean . It will help investigators understand how the plane entered the water. I say well could help by looking at the various compressions on it. Looking at the stresses. Looking at the rips. If you like in the, in the composite material. Where were the forces that hit the, the, this particular point when the aircraft entered the water. But to the point about whether it assists in any way really, anderson, what happened at this particular point . 1 07 to 1 19 to 1 21 in the morning. What happened there on the cockpit. And i dont believe at the moment from what i have heard, and, you know, others may disagree that what we know about this helps us understand that. Interesting. Richard, well have more with you. David sousi, miles obrien. Continue to follow this ahead. On for two hours tonight until the 10 00 hour. There is a lot to cover not only in this, the possible mh370 wing, but also donald trump sitting down with cnns dana bash. Not holding back. They talked about the breast pump charges that was made bay an attorney from a deposition years age whether or not it is relevant . Should it be relevant . Talked about abortion. And also, dana asked him about a tendency that many politicians have to exaggerate. All of that ahead. Mum. Just tap it. I did Yo Gabba Gabba usic thunder clatter by wild cub most weekends only last a couple of days. Some last a lifetime. Hampton. We go together. Always get the lowest price, only when you book direct at hampton. Com sure i offer multicar, safe driver, and so many other discounts that people think im a big deal. And boy, are they right. Ladies, i can share hundreds in savings with all of yo