A screw-like device found in the wreckage of the Boeing 737 Max that crashed last Sunday in Ethiopia indicates the plane was configured to dive, a piece of evidence that helped convince U.S. regulators to ground the model, a person familiar with the investigation said late Thursday night. Scary Video here of airliner crash (upside down) caused by damaged jack screw
https://www.youtube.com/watch?v=9Ewehd9b0_o