In a statement, the FAA stated that the investigators have not yet determined whether the problem with the Ethiopian Airlines crashed on Sunday is related to the problem with which the same aircraft used by Lion Air last year crashed has been.
The FAA said it will make "design changes" to the aircraft to be made next month in response to the Lion Air crash last fall.
] The changes include updates to the computer system and flight crew manual, according to the FAA. It described them as "ongoing oversight activities" rather than as a response to the crash in Ethiopia.
A preliminary report from the investigators revealed that the Lion Air pilots were struggling with a security system designed to prevent the plane from stalling. However, the system received erroneous data and the union of pilots said that the training manual does not contain any details about the system and how to counteract it.
The FAA said the changes would apply to both the 737 MAX 8 and MAX 9, a population of 387 aircraft worldwide and 74 in the US.