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United DC-7 & TWA collide over Grand Canyon killing 128

On June 30, 1956, a Lockheed L-1049A Super Constellation operating as TWA Flight 2, was struck by a Douglas DC-7 Mainliner operating as United Air Lines Flight 718 over Grand Canyon National Park,...

On June 30, 1956, a Lockheed L-1049A Super Constellation operating as TWA Flight 2, was struck by a Douglas DC-7 Mainliner operating as United Air Lines Flight 718 over Grand Canyon National Park, Arizona. The Constellation fell into the canyon, while the DC-7 slammed into a cliff. All 128 on board both aircraft died, making it the first commercial airline incident to exceed one hundred fatalities. Both aircraft had departed Los Angeles International Airport minutes apart from each other and headed for Chicago and Kansas City, respectively.

The collision took place in uncontrolled airspace, where it was the pilots' responsibility to maintain separation ("see and be seen"). This highlighted the antiquated state of air traffic control, which became the focus of major aviation reforms.

Historical Significance

On June 30, 1956, a Lockheed L-1049A Super Constellation operating as TWA Flight 2, was struck by a Douglas DC-7 Mainliner operating as United Air Lines Flight 718 over Grand Canyon National Park, Arizona.

Events Before

  1. "The Bob Cummings Show" premieres on NBC (later moves to CBS)

    "The Bob Cummings Show" premieres on NBC (later moves to CBS)

  2. Bhutan issues its first postage stamps

    The first postage stamps of Bhutan were issued in 1962, the same year that the first motorable road was opened.

  3. Marian Anderson is the first African American to perform with the New York Metropolitan Opera, singing the role of Ulric

    Marian Anderson is the first African American to perform with the New York Metropolitan Opera, singing the role of Ulrica in Giuseppe Verdi's "Un ballo in maschera"

  4. American film director Stanley Kubrick (26) weds second wife, Austrian theatrical designer Ruth Sobotka (29); divorce in

    American film director Stanley Kubrick (26) weds second wife, Austrian theatrical designer Ruth Sobotka (29); divorce in 1957

  5. "The Millionaire" TV series premieres on CBS

    "The Millionaire" TV series premieres on CBS

Events After

  1. Sputnik 1 Launch

    The Soviet Union launches Sputnik 1, the world's first artificial satellite, igniting the Space Age and the US-Soviet Space Race.

  2. An Irish Republican Army (IRA) unit attacks Brookeborough Royal Ulster Constabulary barracks in one of the most famous i

    An Irish Republican Army (IRA) unit attacks Brookeborough Royal Ulster Constabulary barracks in one of the most famous incidents of the IRA's Operation Harvest

  3. Aviator Howard Hughes marries 2nd wife actress Jean Peters

    Aviator Howard Hughes marries 2nd wife actress Jean Peters

  4. South African golfer Gary Player (21) weds childhood sweetheart Vivienne Verwey, until her death in 2021

    South African golfer Gary Player (21) weds childhood sweetheart Vivienne Verwey, until her death in 2021

  5. English-American actress Elizabeth Taylor's 2nd divorce from English actor Michael Wilding, after almost 5 years of marr

    English-American actress Elizabeth Taylor's 2nd divorce from English actor Michael Wilding, after almost 5 years of marriage

More from the 1950s

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The Soviet Union launches Sputnik 1, the world's first artificial satellite, igniting the Space Age and the US-Soviet Space Race.

space explorationscience technology

"The Bob Cummings Show" premieres on NBC (later moves to CBS)

"The Bob Cummings Show" premieres on NBC (later moves to CBS)

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Emil Jannings dies

Emil Jannings, Swiss-born German actor, known for german actor, died on 1950-01-02. Emil Jannings was a Swiss-born German actor who was popular in Hollywood films in the 1920s.

The European Economic Community comes into effect, better known as the European Common Market

The European Economic Community comes into effect, better known as the European Common Market

Frequently Asked Questions

What happened on June 30, 1956?
On June 30, 1956, a Lockheed L-1049A Super Constellation operating as TWA Flight 2, was struck by a Douglas DC-7 Mainliner operating as United Air Lines Flight 718 over Grand Canyon National Park, Arizona. The Constellation fell into the canyon, while the DC-7 slammed into a cliff. All 128 on board both aircraft died, making it the first commercial airline incident to exceed one hundred fatalities.
Why is United DC-7 & TWA collide over Grand Canyon killing 128 significant?
On June 30, 1956, a Lockheed L-1049A Super Constellation operating as TWA Flight 2, was struck by a Douglas DC-7 Mainliner operating as United Air Lines Flight 718 over Grand Canyon National Park, Arizona.

Explore More

June 30 in HistoryYear 1956