The DC-10 had been designed to carry large numbers of passengers over long distances. Its wide cabin, three-engine configuration, and long-range capabilities made it a significant aircraft in the development of commercial air travel during the 1970s.
On that late-May afternoon, passengers boarded Flight 191 expecting to travel across the United States. The crew prepared the aircraft for departure, and the normal checks and procedures associated with a scheduled flight took place. Nothing about the passengers’ routine preparations could have revealed the chain of events that was about to unfold.
The departure runway was long enough for the aircraft to accelerate and reach the speed required for takeoff. As the engines produced thrust, the DC-10 moved down the runway, gathering the energy needed to become airborne.
For pilots, the takeoff phase is one of the most demanding parts of a flight. The aircraft must accelerate, respond to control inputs, and transition from ground movement to flight within a carefully managed sequence. Pilots monitor engine performance, airspeed, and the aircraft’s response, while following established procedures for the departure.
A serious malfunction during this phase presents a particularly difficult challenge. The aircraft may be moving too quickly for an ordinary stop to be simple, yet it may not have enough altitude for the crew to diagnose an unfamiliar problem and recover from it.
That was the situation Flight 191 encountered.
As the aircraft accelerated and lifted from the runway, the left engine assembly separated from the wing. The failure was not merely the loss of an engine’s thrust. The departing assembly damaged other components, including systems needed to maintain the aircraft’s expected behavior after takeoff.
The airplane continued into the air, but the damage had fundamentally changed the situation. The pilots were faced with an aircraft that no longer responded as expected, at a moment when altitude and time were extremely limited.
What followed would become the central focus of the National Transportation Safety Board’s investigation.
The Seconds After Liftoff: Why the Aircraft Could Not Recover
The sequence that followed the engine separation was extraordinarily short. According to the investigation, Flight 191 climbed to approximately 325 feet above the ground before beginning a steep roll to the left. The aircraft continued rolling until its wings passed beyond the vertical position, and its nose dropped below the horizon.
For an aircraft only a short distance above the airport, that left almost no time to identify the problem, understand its effects, and respond.
