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Preliminary data extracted from the flight data recorder of the Ethiopian Airlines plane that crashed show "a clear similarity" with a previous accident in Indonesia, said the Minister of Transport of Ethiopia.
"The black box was found in good condition, which allowed us to extract almost all the data that it contains", Dagmawit Moges told reporters Sunday night.
The parallels would "be the subject of further studies during the investigation", a preliminary report to be published in "30 days", she added.
According to officials, 157 people from 35 different countries were killed when the plane bound for Nairobi crashed shortly after takeoff on 11 March.
A number of countries and airlines have now failed the Boeing 737 MAX 8s.
The company now has to prove that jets are safe, while faulty sensors and software contributed to the two accidents that killed 346 people in less than six months.
The United States Federal Aviation Administration (FAA) has already indicated that satellite tracking data showed that the movements of flight 302 of Ethiopian Airlines were similar to those of flight 610 of Lion Air, which is was crushed in the Java Sea off Indonesia in October, killing 189 people.
The aircraft in both accidents flew with irregular altitude changes that could indicate that pilots have difficulty controlling the aircraft. Shortly after take-off, both pilots reported flight control problems and attempted to return to the airports, but crashed.
In the case of the Ethiopian Airlines flight, the black boxes were handed over to the French airline security agency BEA, which is working with American and Ethiopian investigators to determine what is wrong.
US officials said the FAA and the US security agency NTSB have not yet validated the black box data.
⚠️?? 03/10 accident at the # Boeing737Max @BoeingAirplanes ET-AVJ operated by @flyethiopian First image of the FDR provided by the Ethiopian investigation team. pic.twitter.com/8DzetHxehH
– BEA | Investigations & Analysis Office @ ?? ?? (@BEA_Aero) March 14, 2019
Focus on the sensor
The Advanced Maneuvering Features System (MCAS) of the Advanced Aircraft is under surveillance. On the Lion Air flight, the initial investigation report on the accident indicated that erroneous data provided by a sensor had triggered the anti-stall system repeatedly and may have contributed to the accident. accident.
The FAA said Thursday that all 787 MAX aircraft would remain on the ground until a software upgrade to the MCAS can be tested and installed in all plans.
Boeing said the changes would include updates to "flaw on light control, flight displays, operating manuals and crew training ".
The Seattle Times reported Sunday that Boeing's initial safety badysis at the FAA presented "several crucial flaws". The badysis helps the FAA to certify the safety of an aircraft.
The report indicates that the badysis underestimated the power of the system that could lower the nose of the aircraft, that it could reset itself after a pilot countered it. , and that the consequences of its failure have been poorly described, allowing MCAS to rely on data from a single sensor.
The paper said: "Boeing and the FAA were informed of the details of this story and were asked to respond, 11 days ago, before second crash of a 737 MAX last Sunday. "
A spokesman for Boeing said "that the 737 MAX was certified to meet the same FAA requirements and processes that presided over the certification of all new aircraft and derivative products," according to the agency. Reuters.
"The FAA concluded that the MCAS of all 737 MAXs met all certification and regulatory requirements."
SOURCE:
Al Jazeera and news agencies
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