Cause findings

Not a complete record. A partial collection of documented occurrences: counts, not rates, and no measure of aviation risk. Coverage

8,975 of 183,362 records: Airline. · Show all 183,362

4,446 occurrences have findings that the NTSB designated as a cause. These are the most common areas of those findings; an occurrence can have causes in several areas. Share is of occurrences with cause findings.

Cause areas
Cause area	Occurrences	Share	Fatal occurrences	Fatalities
Miscellaneous acts, conditions › Material failure	Miscellaneous acts, conditions › Material failure: 216 occurrences, 4.9% of occurrences with cause findings. 14 were fatal. The bar is scaled to the largest row.	4.9%	14	137
Environmental issues › Conditions/weather/phenomena	Environmental issues › Conditions/weather/phenomena: 196 occurrences, 4.4% of occurrences with cause findings. 1 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	4.4%	1	1
Personnel issues › Action/decision	Personnel issues › Action/decision: 190 occurrences, 4.3% of occurrences with cause findings. 3 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	4.3%	3	11
Weather › Turbulence, associated w/clouds and/or thunderstorms	Weather › Turbulence, associated w/clouds and/or thunderstorms: 136 occurrences, 3.1% of occurrences with cause findings. 7 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	3.1%	7	238
Miscellaneous acts, conditions › Fatigue fracture	Miscellaneous acts, conditions › Fatigue fracture: 135 occurrences, 3.0% of occurrences with cause findings. 15 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	3.0%	15	128
Personnel issues › Task performance	Personnel issues › Task performance: 127 occurrences, 2.9% of occurrences with cause findings. 4 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	2.9%	4	17
Pilot in command › Failed to follow approved procedures, directives, etc.	Pilot in command › Failed to follow approved procedures, directives, etc.: 123 occurrences, 2.8% of occurrences with cause findings. 32 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	2.8%	32	1,244
Personnel › Inadequate maintenance and inspection	Personnel › Inadequate maintenance and inspection: 107 occurrences, 2.4% of occurrences with cause findings. 6 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	2.4%	6	37
Personnel › Passenger	Personnel › Passenger: 99 occurrences, 2.2% of occurrences with cause findings. 5 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	2.2%	5	48
Miscellaneous acts, conditions › Seat belt not fastened	Miscellaneous acts, conditions › Seat belt not fastened: 94 occurrences, 2.1% of occurrences with cause findings. 0 were fatal. The bar is scaled to the largest row (Miscellaneous acts, conditions › Material failure, 216).	2.1%	0	0

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