The data shows both he and the co-pilot after that operated the plane's controls. Nance said that one possible explanation for this is that the pilot may have been trying to bring the plane back up while the co-pilot wanted to force it down. The plane's engines were cut off moments later. But the plane began to rise again once the plane reached about 17,000 feet. Radar data indicated that the plane rose back to about 22,000 feet before it turned and dropped into the ocean.
Investigators suspect the pilot crashed the plane on purpose.
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