Airplane Crash - Grand Canyon, Arizona 06/30/1956

Details of airplane crash/ shootdown - Grand Canyon, Arizona

LocationGrand Canyon, Arizona
OperatorUnited Air Lines / Trans World Airlines
Flight #718 / 2
RouteLos Angeles - Chicago / Los Angeles - Kansas City
TypeDouglas DC-7 / Lockheed S Constellation
Cn/In44288 / 4016
SummaryThe TWA aircraft flying from Los Angeles to Kansas City and the United Aircraft flying from Los Angeles to Chicago collided over the Grand Canyon. Both planes were traveling about 320 mph. Both aircraft were flying in uncontrolled airspace. All fifty-eight on the DC-7 and seventy on the Constellation killed. The pilots did not see each other in time to avoid the collision. It is not possible to determine why the pilots did not see each other, but the evidence suggests that it resulted from any one or a combination of the following factors: 1) Intervening clouds reducing time for visual separation 2) Visual limitations due to cockpit visibility 3) Preoccupation with normal cockpit duties.

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