There were eye witness reports to that effect, but the proof would be in the flight recorders. https://www.reuters.com/article/us-ethiopia-airplane-witnesses/e

There were eye witness reports to that effect, but the proof would be in the flight recorders. https://www.reuters.com/article/us-ethiopia-airplane-witnesses/ethiopian-plane-smoked-and-shuddered-before-deadly-plunge-idUSKBN1QS1LJ https://www.reuters.com/article/us-ethiopia-airplane-witness...