The investigation of the Ethiopian crash is still in its early stages, and the full data cited by the authorities has not been publicly released. may have been activated on the Ethiopian flight and could have contributed to the crash. Each interval took about 15 to 20 seconds, leaving a repetitive signature on the data for the plane’s vertical speed. Vertical speed of Ethiopian Airlines flight 3,000 feet per minute 21 seconds 1,500 Climb 0 Descent -1,500 Approximate periods of increasing and decreasing vertical speed Takeoff +1 min. We’ll know more when we get the flight data recorder,” Professor Hansman said.

Source: New York Times March 14, 2019 01:16 UTC