Three turbulence-related deaths since 1980 , FAA says . While pilots are always on the lookout for regular turbulence spots -- like mountain ranges and places where weather fronts are converging -- clear-air turbulence can happen anywhere . At least two of the three were people not wearing seat belts . Turbulence is caused by quick changes in air movement . The plane was flying at about 10,000 feet when it hit a tree and crashed into a field near the airport.
Three turbulence-related deaths since 1980 , FAA says . At least two of the three were people not wearing seat belts . Turbulence is caused by quick changes in air movement . The plane was flying at about 10,000 feet when it hit a tree and crashed into a field near the airport.