The US National Transportation Safety Board said it concluded that the poor sensor reading was caused by a collision with an object, most likely a bird.
The Ethiopian Aviation Authority had announced that the erroneous readings provided by the sensor, which measures the direction of the aircraft’s nose, were caused by electrical problems that had existed since the aircraft was built.
Both sides, the American and Ethiopian, agree that it was sensor readings that prompted a new automatic flight control system on the “Max” model to point the plane’s nose down, and the pilots were unable to regain control of it.
The accident killed all 157 people on board, and occurred less than five months after 189 people were killed in a Max plane crash, also, in Indonesia.-
The National Transportation Safety Board published its new comments Tuesday, three weeks after its initial criticism of Ethiopia’s findings on the cause of the crash, which led to the worldwide grounding of all Max planes for nearly two years.--
Boeing will appear Thursday in federal court in Texas on charges of defrauding the United States.
Relatives of some of the crash victims are expected to speak.
Victims’ families are pressing the Justice Department to reopen a settlement in which Boeing agreed to pay $2.5 billion in exchange for not facing criminal prosecution over the way it obtained regulatory approval for the plane.