New details in the probe into the Ethiopian 737 jetliner crash indicate the pilots disabled a safety system driving down the nose yet still crashed, deepening the mystery of what happened.
Ethiopian authorities were preparing to release a preliminary report on the accident Thursday.
The flight crew on the Ethiopian Airlines flight followed a protocol set by plane-maker Boeing to manually disable an automated anti-stall system as they tried to save the 737 Max jet, a person familiar with the situation said.