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AirAsia QZ8501 Black Box Found 95

jones_supa writes Indonesia's Directorate General of Marine Transport has confirmed that the black box of AirAsia QZ8501 has been found, Indonesian authorities said in a press release. The breakthrough comes exactly two weeks after the flight from Surabaya to Singapore went down with 162 people on board. In the press release, marine transport coordinator Tonny Budiono said that the credit goes to navy divers from Indonesia navy ship KN Jadayat, who found the black box at a depth of 30 to 32 meters. The black box is currently wedged between pieces of wreckage making it difficult for divers to retrieve, and due to time constraints, the actual retrieval will take place on Monday morning.
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AirAsia QZ8501 Black Box Found

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  • "The" black box ? (Score:5, Informative)

    by rossdee ( 243626 ) on Sunday January 11, 2015 @10:36AM (#48786719)

    I thought there were 2 of them

    Flight Data recorder (records all the instrument readings and control inputs from the pilot)
    Cockpit Voice recorder (rocords the voices of the pilot and copilot saying "shit"

    Generally the first one is the most important source of information.

    • Re:"The" black box ? (Score:5, Informative)

      by Anonymous Coward on Sunday January 11, 2015 @10:47AM (#48786775)

      Bot FDR and CVR record the same data on an A320. They are redundant units. One is in the tail, one is in the middle of the aircraft. If one is found, they have everything they need to investigate.

      • from bbc - "Divers retrieved one of the flight data recorders of crashed AirAsia Flight QZ8501, says officials, but the voice recorder is still missing"

        if you are right, then the report is a lie.

        can you support your statement?

        • Why is the report a lie? They are still to different devices.

          They are also built differently and subject to different forces during a crash. They know where the fuselage is so there's very little in the way of problem retrieving the devices. Not sure about the statement but would it not be better to have two of the recording devices which just suffered from a high speed collision with water and dropped into the bottom of the ocean rather than relying on one to be perfectly functional? I wouldn't be so quick

          • (currently scored 5, informative) to which i am responding. according to that, they are not different devices, they are redundant units - there are two, and BOTH record BOTH cockpit voice AND flight data, i presume on the same media. at last word the bbc is reporting that the cockpit voice is still missing, but this does not make sense, if the AC i am replying to is correct.

            • I did and my point was the same. Redundancy does not mean 100% identical. Look it up. In the digital world both devices located in different areas of the plane built in different ways record the same set of data (in some planes).

              Now as to if this is 100% the case I don't know. But I do know journalists and if the hear something like we have an FDR but no FVC most of them these days don't bother following up on the the details and will simply rush out and say "Voice still missing".

              As of the time I posted I h

              • thank you for clarifying. my opinion is that, since we have the ability, it makes a lot more sense to record both streams on both devices, as this gives a better chance of recovery, should either or both be compromised. i wonder what the truth is...

        • by dave420 ( 699308 )
          The only thing which does not add up is your reading comprehension :) The OP stated there are two recorders, which record both the flight data & the cockpit voice. So no, both can be correct.
          • please read the reply (currently scored 5, informative) to which i am responding. according to that, they are not different devices, they are redundant units - there are two, and BOTH record BOTH cockpit voice AND flight data, i presume on the same media. at last word the bbc is reporting that the cockpit voice is still missing, but this does not make sense, if the AC i am replying to is correct.

    • Re:"The" black box ? (Score:5, Informative)

      by Richard_at_work ( 517087 ) on Sunday January 11, 2015 @11:40AM (#48787001)

      The FDR usually gives the "how", the CVR typically fills in the "why".

      The FDR gave us a Controlled Flight Into Terrain in the AF447 crash, the CVR told us the crew were completely confused as to what was going on and didn't perform the correct procedures.

      The CVR also records other sounds in the cockpit, and has been used many times to determine if certain actions were performed, identifying if the failure was mechanical or human error - for example, in one case a plane that overrun the runway on landing in bad weather because the pilots failed to arm the spoilers, which was determined through the lack of arming sound on the CVR.

      • Re:"The" black box ? (Score:4, Interesting)

        by Anonymous Coward on Sunday January 11, 2015 @02:15PM (#48787925)

        AF447 was not controlled flight, it was falling like a brick with a slight nose up pitch. They had barely any airspeed but the idiot with his hand on the sidestick thought they had too much, to quote him "crazy speed".

        I might add another example of the CVR providing data through registered sounds: Air Florida 90. They didn't have takeoff thrust but thought they did because the engine pressure ratio indicators were frozen and showed a higher value than reality. The investigators compared the engine sound from an identical aircraft with that heard on the CVR. I also recall from watching Air Crash Investigation that in an explosion with practically no conversation recorded after the event, there can be an indication on the tape just before it ends due to the microphone having a noise filter which registers that some sound is coming.

        • Re:"The" black box ? (Score:5, Interesting)

          by Richard_at_work ( 517087 ) on Sunday January 11, 2015 @03:04PM (#48788249)

          AF447 was controlled flight, the pilots were in complete control for the entire time, there was no departure from pilot command at any time during the flight. There was no mechanical failure which caused the aircraft from being uncontrollable.

          That makes it CFIT within the meaning defined by accident investigators. The aerodynamic stall was created by the pilot-flying action, and could have corrected the issue at any point, but did not. The aircraft was not in a situation where command input would not have been able to control the aircraft, so definitely a CFIT.

  • by Anonymous Coward

    That way it'll never get destroyed!

    • It certainly won't, because it will be too heavy to get off the ground.

    • Re: (Score:2, Insightful)

      by Anonymous Coward

      Alternatively, do we really need to find the physical box? What would it take to be able to retrieve all of the data off of the box wirelessly?
      We would still need to locate the "ping" but at least we wouldn't have to find the actual box.

      • I think it needs battery to keep it on 24/7 in order ot keep broadcasting. Also, not sure about how different wireless signal goes through water (in this case). So it is possible to implement the idea you mentioned, but not sure if it is effective in both usability and cost in general...
        • by Agripa ( 139780 )

          Also, not sure about how different wireless signal goes through water

          Wireless performs too poorly in water to use but modulated sound would work fine.

      • At some point in time, each and every aircraft will have satellite Internet. How hard would it be at that point to have the black box data streamed in near-real time to a command base? You can make the link one-way so even if security is compromised, there would be no risk to flight systems.

    • by Agripa ( 139780 )

      Potting the passengers, crew, and luggage into the body of the plane would also prevent hijacking and terrorism.

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