The next step of the process is to ascertain the impact frequency from nonairport
operations (see Section 5.3.2 of the standard). First, determine the aircraft crash
frequency from general aviation nonairport operations. To do this, the analyst first
obtains the generic maximum value of NPf(x,y) for general aviation nonairport
operations from Table B-14. The general aviation nonairport crash frequency is shown
in Table B-41.
TABLE B-41. General aviation nonairport crash frequency.
A, sq. miles
Generic Maximum Nonairport
Value for NPf(x,y)
The next step is to determine the commercial and military aviation in-flight crash
frequency, following Steps 9 through 16 of Chapter 5. To do this, the analyst obtains
the maximum NPf(x,y) for these aircraft categories from Table B-15. The commercial
and military aviation nonairport crash frequencies are shown in Table B-42.
TABLE B-42. Commercial and military nonairport crash frequencies.
Generic Maximum Value
Frequency (per year)