American Airlines Flight 191 Crash
As the DC-10 aircraft was flying over the O’Hare International Airport on May 25, 1979, its left engine and Pylon assembly just fell off and the DC -10 rolled over in mid-air and then plunged straight down to the ground a mile from the main runway.
Worst Aviation disaster in the US history
Source: https://www.fastaviationdata.com/what-caused-the-american-airlines-flight-191-crash-in-1979/