Pilot error generally refers to an accident in which an action or decision made by the pilot was the cause or a contributing factor that led to the accident, but also includes the pilot's failure to make a correct decision or take proper action. Errors are intentional actions that fail to achieve their intended outcomes. Chicago Convention defines accident as "An occurrence associated with the operation of an aircraft [...] in which [...] a person is fatally or seriously injured [...] except when the injuries are [...] inflicted by other persons." Hence the definition of the "pilot error" does not include deliberate crash (and such crash is not an accident). The causes of pilot error include psychological and physiological human limitations. Various forms of threat and error management have been implemented into pilot training programs to teach crew members how to deal with impending situations that arise throughout the course of a flight. Accounting for the way human factors influence the actions of pilots is now considered standard practice by accident investigators when examining the chain of events that led to an accident. Description Modern accident investigators avoid the words "pilot error", as the scope of their work is to determine the cause of an accident, rather than to apportion blame. Furthermore, any attempt to incriminate the pilots does not consider that they are part of a broader system, which in turn may be accountable for their fatigue, work pressure, or lack of training. The International Civil Aviation Organization (ICAO), and its member states, therefore adopted James Reason's model of causation in 1993 in an effort to better understand the role of human factors in aviation accidents. Pilot error is nevertheless a major cause of air accidents. In 2004, it was identified as the primary reason for 78.6% of disastrous general aviation (GA) accidents, and as the major cause of 75.5% of GA accidents in the United States. There are multiple factors that can cause pilot error; mistakes in the decision-making process can be due to habitual tendencies, biases, as well as a breakdown in the processing of the information coming in. For aircraft pilots, in extreme circumstances these errors are highly likely to result in fatalities. Causes of pilot error Pilots work in complex environments and are routinely exposed to high amounts of situational stress in the workplace, inducing pilot error which may result in a threat to flight