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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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    近代的歷史

    在1956年大峽谷在那時是美國最壞的商用航空災難的場所。

    在1956年6月30日的早上, TWA洛克希德超級星座和聯合航空公司道格拉斯DC-7 死了洛杉磯國際機場在彼此關於向東行橫貫大陸航機3 分鐘內。 當時大約以後90 分鐘,兩螺旋槳驅動客機高於峽谷相撞兩個在反監聽領域空飛。

    兩架飛機的殘骸分成峽谷東方的部分, 在廟和Chuar孤峰群上,在科羅拉多和小科羅拉多河的合流附近。 這場災難造成兩架飛機上128名乘客跟空勤人員全部罹難。

    這次事故導致高海拔飛行路線和在途中地控制人員的控制。

    參考資料: DR. EYE + 自己做部分修改
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