Aviation Safety Network > ASN Aviation Safety Database > (Contributory) cause index
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Taxonomy of occurrence categories.

AIRPLANE
Airframe failure, Engines, Flight surfaces, Instruments, Pressurization, Systems, Undercarriage

ATC & NAVIGATION
Language/communication problems, VFR flight in IMC, Wrong or misinterpreted instructions

CARGO OCCURRENCES
Centre of Gravity outside envelope, Airplane overloaded etc.

COLLISIONS
Collisions between aircraft (on the ground and in the air), Bird strikes, Runway Incursions

EXTERNAL FACTORS
Foreign Object Damage (FOD), Wake vortex.

FLIGHTCREW
Alcohol/drug usage, Mental condition, Non adherence to procedures, Insufficient rest / fatigue etc.

FIRE
Hangar/ground fire, Inflight fire, etc.

LANDING/TAKEOFF
Fast, heavy landing, Tailstrike, Locked rudders/ailerons/gustlock, Wrong takeoff configuration (flaps/trim) etc.

MAINTENANCE
Failure to follow AD and SB's, Wrong installation of parts etc.

RESULT (IATA End State)
CFIT, Loss of control etc.

SECURITY
Sabotage (bomb), Shot down, Hijack etc.

WEATHER
Icing, Lightningstrike, Thunderstorm, Windshear etc.

UNKNOWN
probable cause undetermined

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