Flight simulation shows what it might have been like during the last seconds on the doomed Boeing jet that crashed in Africa. The pilot reported an unspecified problem and was trying to return to the airport. Up until then, American regulators had held off as nation after nation had grounded the plane, Boeing's best-selling jet model.
French authorities have the flight data and cockpit voice recorders, though Ethiopia is formally leading the investigation and US experts are in Paris and Addis Ababa too.
New evidence points to similarities between two deadly crashes involving the Boeing 737 Max 8.
Boeing, in its turn, said on Wednesday that it had "full confidence" in the safety of its 737 MAX aircraft but supported the decision to temporarily ground the entire fleet of 737 MAX 8 and 737 MAX 9 series planes after the crash. A spokesman for the BEA agency said downloading the data from the recorder retrieved from wreckage was expected to take four to five hours.
However, Boeing said, in a statement, that it expects the US Federal Aviation Administration (FAA) to approve design changes to the planes' software "no later than April 2019".
French authorities now have the plane's flight data and voice recorders for analysis.
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The airlines weren't able to produce reports of bodies because the passengers remains have been charred due a fire during the crash. But the plane crashed minutes later outside Addis Ababa, killing all 157 on board.
Boeing shares suffered more than 10 percent decline in the week when a wave of countries suspended the aerospace giant's 737 Max jets in the wake of the deadly crash in Ethiopia.
Engineers had to find out what the system was doing on the Lion Air flight, how the system's commands appeared to pilots, what changes needed to be made to software, manuals and training, and the best way to make those changes. Investigators examining that crash are looking at whether software created to prevent a stall might have automatically pushed the plane's nose down repeatedly.
At the crash site in Hejere, about 50 kilometers (31 miles) from Addis Ababa, searchers continued to pick through the debris. "The next steps will take some time", he said.
Shortly before the manoeuvre, the air traffic controller had been in communication with other aircraft when the voice from Ethiopian Airlines flight 302 interrupted, saying "break, break" - signalling that other non-urgent communications should cease. Including, Nine Ethiopians, 32 Kenyans, 18 Canadians and eight people each from China and Italy. Associated Press writers Isabel DeBre in Jerusalem, Dave Koenig in Houston and Tom Krisher in Detroit and video journalists Josphat Kasire and Desmond Tiro contributed.