Experts say that there were similarities in the crash of Ethiopian Airlines and that of Lion Air. What were some of them?


The Ethiopian Transport Minister reiterated this point on Sunday, saying preliminary data retrieved from the crash black boxes in Ethiopia showed similarities with the Air Lion crash.

No agency has provided a lot of details.

Ethiopian Airlines Flight 302 crashed on the morning of 10 March after taking off from Addis Ababa to Nairobi, Kenya, killing 157 people. The plane was carrying passengers from all over the world, many of whom were working for the United Nations.

Lion Air Flight 610 crashed into the Java Sea in Indonesia on October 29, after taking off from Jakarta. The 189 people on board are dead. The plane was scheduled to travel one hour to Pangkal Pinang on Bangka Island.

Both were Boeing 737 Max 8 aircraft

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The Boeing 737 Max 8 was a new model unveiled with great fanfare by the American aviation giant about two years ago. The airline has also produced a Max 9 and plans to offer Max 7 and Max 10 models, with model numbers based on the number of seats.

According to the FAA, about 350 Boeing 737 Max 8 aircraft are in operation worldwide and belong to 54 operators.

The Boeing website states that the 737 Max is the best-selling aircraft in the history of the company, with approximately 5,000 orders placed by more than 100 customers worldwide.
President Donald Trump said on March 13 that his administration ordered the grounding of all Max 8 and 9 models a few hours after Canada said it was failing planes after analyzing the new satellite tracking data.

Both aircraft used the same software

The aircraft were equipped with automated flight software called the Maneuverability Enhancement System (MCAS), a relatively new feature of Boeing Max aircraft.

The MCAS is a system that automatically lowers the nose of the aircraft when it receives information from its external attack angle sensors (AOA) indicating that the aircraft is flying too far slowly or too strongly and may stall.

AOA sensors transmit to aircraft computers information on the nose angle of the aircraft in relation to the airflow above and under the wings to help determine if the aircraft Plane is about to stall.

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Jean-Paul Troadec, the former head of the French Aviation Accident Investigation Bureau, told CNN that he had noticed flaws in the system.

"I think the design of this system is not satisfactory because it relies only on a sensor," he said. "In the event of a failure of this sensor, of course, the system does not work, in which case it may be difficult for the pilot to overreact to the system."

Boeing chief executive, Dennis Muilenburg, announced Monday that a software update and corresponding driver training for the 737 MAX would be published "soon" and would address concerns discovered as a result of the Lion Air crash .

Both aircraft crashed shortly after takeoff

The flight of Ethiopian Airlines collapsed six minutes after takeoff.

The Air Lion plane crashed 13 minutes after takeoff.

Both aircraft had experienced crews

Ethiopian Airlines tweeted that the first officer totaled 350 flying hours and the pilot commanding 8,100 hours.
The captain of the Lion Air flight, Bhavye Suneja, of Indian nationality, had flown more than 6,000 hours. His co-pilot, Harvino, had already registered more than 5,000, according to a statement from Lion Air.

The International Civil Aviation Organization, a UN agency, recommends that commercial pilots have a minimum of 150 hours. The FAA requires commercial pilots to have 1,500 hours.

Both pilots reported problems

The Ethiopian Airlines pilot said he was having trouble and asked to return to base, CNN Tewolde GebreMariam, CEO of Ethiopian Airlines told CNN. The pilot was cleared to return to the ground at about the same time the flight disappeared from the radar.
A preliminary report from the Indonesian National Committee for Transport Safety indicated that the crew of the Air Lion 610 flight was struggling to neutralize the automatic systems of the aircraft in the minutes before it took off in the air. 39; ocean. The system has diveed more than twice, the report said.

The report states that the MCAS system responds to incorrect data transmitted by an AOA sensor. A different crew experienced the same problem on a Denpasar-Jakarta flight the day before, but he had disabled the MCAS and took manual control of the plane, the paper said.

The Ethiopian Accident Investigation Bureau intends to issue a preliminary report within 30 days.

CNN's Veronica Stracqualursi, CN Patterson, Anna Cardovillis, Kara Fox and Dakin Andon contributed to this report.

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