

DOESTD301496
APPENDIX B
B.2
Aircraft Crash Rates. Generic crash rates for each aircraft category and subcategory
were calculated based on a review of accident reports published by FAA and/or the
National Transportation Safety Board (NTSB) for civilian aircraft, and by the United
States military for military aircraft. The evaluation techniques used to estimate specific
crash rates for each aircraft category or subcategory are documented in Reference 2.
See this document for more information on the databases and evaluation techniques.
Table B1 provides the generic crash rates for each aircraft category (and subcategory
as available).
Crash Location Probability. Crash location probabilities per square mile in the vicinity of
B.3
a runway were calculated based on a review of accident reports published by FAA
and/or NTSB for civilian aircraft, and by the United States Air Force for military aircraft.
The probability values are given in a tabular format for commercial, general aviation,
and military aircraft categories (or subcategories as available). The probability values
are a function of distance from an intended runway. Each probability value reflects the
conditional probability that, given a crash, the crash will occur within a specific one
squaremile bin in the vicinity of an airport. The data and calculations used to
determine the probability values are provided in Reference 2.
Since the crash location probabilities are a function of distance from a runway, it is
important that the coordinate convention specified in this standard be used. Using this
convention, the analyst will determine the facility's location coordinates (x and y
distances) and find the appropriate probability value for the facility.
B2

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