A pilot error is an unvoluntary action where a wrongly-executed maneuver can cause a small incident during a flight or even a fatal accident in the worst cases, in fatal accidents this is oftenly discovered when climate conditions and mechanical failures are completely discarted from possible causes. In some fatal accidents where the pilot dies, the most important reasons of commiting a fatal error are not completely confirmed, while in other cases it's easy to determine it by just listening to cockpit voice recorders.