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Recent history In 1956 the Grand Canyon was the site of America's worst commercial aviation disaster at the time. On the morning of June 30, 1956, a TWA Lockheed Super Constellation and a United Airlines Douglas DC-7 departed Los Angeles International Airport within three minutes of one another on eastbound... 顯示更多 Recent history
In 1956 the Grand Canyon was the site of America's worst commercial aviation disaster at the time.
On the morning of June 30, 1956, a TWA Lockheed Super Constellation and a United Airlines Douglas DC-7 departed Los Angeles International Airport within three minutes of one another on eastbound transcontinental flights. Approximately 90 minutes later, the two propeller-driven airliners collided above the canyon while both were flying in unmonitored airspace.

The wreckage of both planes fell into the eastern portion of the canyon, on Temple and Chuar buttes, near the confluence of the Colorado and Little Colorado rivers. The disaster killed all 128 passengers and crew members aboard both planes.
This accident led to the institution of high-altitude flightways and positive control by en route ground controllers.
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