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---------------------- 2311 - Ethiopian Airlines Boeing 737 MAX 8 crashed
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- Ethiopian Airlines said Thursday that the black box flight recorders from the crashed plane had been flown to Paris for analysis by the BEA, France's aviation investigation and analysis agency.
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- It is uncertain how much of their content can be retrieved as both the aircraft's black boxes, found Monday, were damaged in the crash.
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- Introduced in the late 1950s, “black boxes” help explain nearly 90 percent of all crashes, according to aviation experts.
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- All commercial planes are required to have two of them on board—a flight data recorder and a cockpit voice recorder.
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- The data recorder stores up to 25 hours worth of second-by-second information including on speed, altitude, engine performance and flight trajectory.
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- In the case of the October Lion Air accident in Indonesia killing 189, the first of two Boeing 737 MAX 8 crashes within five months, black box analysis showed that there was a problem with the aircraft's speed when it went down.
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- It can take weeks to retrieve and analyze flight data and sound recordings. The voice recorder picks up conversations by pilots and flight attendants and also other sounds on board, including possible alarms.
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- All black boxes used in civil aviation function the same way according to a common user protocol, regardless of their make.
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- It can take weeks for investigators to retrieve the data inside, and results are typically withheld from the public until the information has been thoroughly examined, which can take years.
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- The recorders are housed in boxes built to survive extreme shocks, fire and lengthy periods underwater.
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- Despite their name, the two boxes are in fact bright orange, with reflective stripes to make them easier for search teams to spot.
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- They each weigh seven to15 to 22 pounds and can survive in water as deep at 20,000 feet, or for an hour at 2,012 degrees Fahrenheit.
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- To make them easier to find, they are fitted with a beacon which can emit a signal for one month.
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- In January 2004, the black boxes of an Egyptian charter plane that crashed into the Red Sea were found after a two-week search, 1,000 meters down.
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- In 2011, after 23 months submerged at a depth of 3,900 meters in the Atlantic Ocean, the intact black boxes of Air France flight AF447 were found, allowing investigators to determine what caused the 2009 crash.
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- Lion Air flight JT610 came down in water some 30-40 meters deep and both black boxes were found within 10 meters of each other.
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- Long-haul Airbus A350 and A380 passenger jets will soon come equipped with eject able black boxes that can float, making them easier to find after accidents over water.
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- On Wednesday, Indonesian authorities were confident that sonar technology had pinpointed the location of the downed Lion Air jet, after two days of searching for the wreckage and its crucial data.
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- Lion's admission that the plane had an unspecified technical issue on a previous flight, as well as the plane's abrupt nosedive just 12 minutes after takeoff, have raised questions about whether it had any faults specific to the newly released model.
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- The digital flight data recorder gathers information about the speed, altitude and direction of the plane with enough storage for 25 hours of data, while the cockpit voice recorder keeps track of conversations and other sounds in the pilots' cabin.
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Analyzing the data can take "days or even weeks" depending on what state the boxes are in, according to an expert who worked on the 2004 investigation of a Boeing 737 that plunged into the Red Sea after taking off from Sharm el-Sheikh, with the loss of all 148 lives on board.
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- Introduced in the 1960s, flight recording devices are housed in boxes built to survive extreme shocks, fire and lengthy submersion underwater. To make them easier to find, they are fitted with a beacon which can emit a signal for one month.
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- It will be interesting to see what they learn. Let me know if you hear anything. This might take some time. Legal claims will certainly stall the report. Let’s hope it does not take a dive as well.
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- March 15, 2019
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-------------------------- Saturday, March 16, 2019 --------------------------
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