American Airlines Flight 191, a McDonnell Douglas DC-10-10, was involved in a devastating accident shortly after takeoff from O'Hare International Airport, Chicago. On May 25, 1979, the aircraft had just started its ascent when it experienced a catastrophic failure of its left engine, which had been torn off during takeoff. The flight was operating under normal conditions when it hit turbulence shortly after liftoff, causing the plane to roll uncontrollably before crashing into a field near an expressway. The impact resulted in the immediate loss of all 271 people on board, including 258 passengers and 13 crew members, and two fatal injuries on the ground.The crash raised serious questions about aircraft safety and operational procedures, leading to significant changes in airline regulations. An investigation by the National Transportation Safety Board (NTSB) identified pilot error and maintenance oversights as contributing factors. It was one of the deadliest air disasters in American history, shaping future training and maintenance protocols to enhance air safety. The aftermath saw heightened scrutiny over the design and operational capabilities of the DC-10, resulting in widespread perception changes about commercial aviation safety standards.