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When a pilot feels stressed, he or she will notice an increase in heart rate, higher blood pressure, muscle tensions, anxiety and fatigue. [15] These physiological stress symptoms eventually interrupt the pilot's cognitive functions by reducing his or her memory capacity and restraining cue samples.
On April 5, 2011, the FAA issued an emergency airworthiness directive (AD) requiring operators of 737 series 300, 400 and 500 aircraft to increase the frequency of inspections of lap joints on high flight cycle airframes. The AD requires that aircraft with over 30,000 cycles be inspected within 20 days of receipt of the AD, or upon reaching ...
AIA Flight 808 was the first aviation accident where pilot fatigue was cited as a probable cause. [4] The NTSB issued a recommendation to the Federal Aviation Administration to review and update regulations on crew scheduling and duty time limits to incorporate the latest research into the effects of fatigue. [1]
The report found that the accident had been caused by fatigue failure of the first stage rotor of the low pressure compressor in engine No. 1, that resulted in the rotor disc disintegrating. Fragments from the rotor disc destroyed engine No. 1, severed the No. 1 and No. 3 hydraulic systems, and partially severed the fuel lines to engine No. 2.
Seven weeks after the accident the Minister for Civil Aviation, Reg Swartz, announced that the accident had been caused by metal fatigue and he did not consider it necessary to appoint a court to inquire into the accident. [20] This position was challenged by the opposition spokesman for aviation, Charlie Jones. [21]
A Federal Aviation Administration (FAA) study of 55 human-factor aviation accidents from 1978 to 1999 concluded that number accidents increased proportionally to the amount of time the captain had been on duty. [7] The accident proportion relative to exposure proportion rose from 0.79 (1–3 hours on duty) to 5.62 ( more than 13 hours on duty).
The captain attempted to deviate the flight's route around a severe thunderstorm, bringing them in an area with higher terrain, but did not increase altitude and the flight eventually struck a mountain. A major factor in the accident was that the flight was conducted under visual flight rules at night with no air traffic control while en route.
The Convention on International Civil Aviation Annex 13 formally defines an aviation accident as an occurrence associated with the operation of an aircraft, which takes place from the time any person boards the aircraft with the intention of flight until all such persons have disembarked, and in which (a) a person is fatally or seriously injured, (b) the aircraft sustains significant damage or ...