The 1956 Grand Canyon Mid-Air Collision

On the morning of June thirtieth, nineteen fifty-six, a United Airlines Douglas DC-Seven lifted off from Los Angeles bound for Chicago. A few minutes later, a TWA Lockheed Constellation departed the same airport for Kansas City. Both crews filed instrument flight plans that took them over the Grand Canyon, because the canyon was a landmark passengers liked to see. United Airlines was flying at twenty-one thousand feet. TWA's filed plan was nineteen thousand feet. TWA's captain requested permission to climb to twenty-one thousand feet to avoid thunderheads. Air traffic control denied that specific request but approved a separate clearance letting the TWA crew fly above the clouds at the pilot's own discretion, authority that put the plane into the same altitude band as United. Air traffic control at the time had no radar coverage of that airspace. No one was watching.

The two planes collided over the eastern canyon, above a remote arm of the gorge near a rock formation called Chuar Butte. The United DC-Seven's left wing cut through the Constellation's tail. Both aircraft disintegrated. The wreckage of all one hundred twenty-eight people aboard both planes fell into one of the most inaccessible sections of the Grand Canyon. Recovery teams had to be lowered by rope into the gorge. Some remains were never retrieved. The canyon absorbed the catastrophe completely. A tourist standing at Desert View Watchtower that morning would have seen nothing unusual in the sky before it happened.

The investigation that followed, conducted by the Civil Aeronautics Board, exposed a crisis that the commercial aviation industry had been quietly managing for years. American airspace had no unified control system. Airlines filed their own routes with minimal coordination. Pilots communicated with dispatchers, not with each other or with a centralized authority. The system had worked as long as traffic was light. By nineteen fifty-six, the skies over the United States carried millions of passengers a year, and the system was held together essentially by luck and professional courtesy.

Congress was not moved by near-misses. It took one hundred twenty-eight deaths to produce action. In nineteen fifty-eight, two years after the Grand Canyon collision, Congress established the Federal Aviation Agency, later reorganized as the Federal Aviation Administration. The FAA unified American airspace control under a single authority, mandated radar coverage of commercial routes, and created the system that today tracks every commercial flight in the country in real time.

The canyon that tourists photograph from the rim absorbed the worst aviation disaster in American history and gave no sign of it. The wreckage is still down there.