Flydubai: What happens when a plane plunges 17,000 feet?

A flight instructor has used a flight simulator to recreate the severe upset experienced by a Flydubai aircraft, which plunged in a near-vertical descent of about 17,000 feet. The instructor’s simulated replay focused on the dynamics of the dive and the forces the airframe and occupants would have encountered. In his assessment, the jet would have passed its published maximum structural speed while descending.

That overspeed condition means aerodynamic loads on the airframe would have exceeded the limits the aircraft was certified to withstand. The instructor also highlighted the human and cabin consequences of the maneuver: during the recovery phase, negative G-forces would have occurred, which would propel unsecured objects and potentially passengers toward the cabin ceiling or in unpredictable directions.

The simulator reconstruction does not itself determine the root cause of the real-world event but provides a view of the physical environment crew and aircraft likely faced during the upset. Such recreations are commonly used by investigators and trainers to assess how crew actions, aircraft performance limits, and cabin security interact during extreme flight deviations.

Observers say these findings underline why adherence to speed and load limits, robust crew training for upsets, and ensuring cabin items are secured are central to minimizing injury and structural damage when flights encounter unusual attitudes or accelerations.