UNited Airlines Flight 232 was a routing flight from Denver to Philadelphia via Chicago. However, due to what were later determined to be inadequate standards for maintainence, the tail engine failed, taking all flight controls with it. The flight crew managed the problem in an exemplary fashion, using the two wing engines as rough controls.
The crippled plane limped to Sioux Gateway Airport, in Sioux City, Iowa, where they attempted a landing. Being unable to slow the plane down without controls, they landed at much too high a speed, and the plane broke up on the runway, killing 111 of the people aboard, although 185 others survived, largely due to prompt medical attention provided at Sioux City, and the fact that the crash took place in daylight hours. In the wake of the crash, safety standards were tightened on all US passenger aircraft.
Crash Flight 232 — Leæther Strip