The final report by the Dutch Safety Board said that a combination of the errors resulted in the crash. The altimeter failed, bad reactions from the Turkish Airlines pilots, plus a loss of speed and insufficient air traffic control directions led to the crash.
The board said that due to the failing of the altimeter, the plane automatically lost speed, dropping below the minimum velocity needed to avoid the risk of engines stalling.
The pilots failed to intervene either adequately or early enough at several crucial moments of the descent, said safety board director Pieter van Vollenhoven, who called for better international pilot training to deal with emergencies.
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