| Causal Factors
Causal Factors
explanations as a PDF file
Event
Factors of Level Busts since 2006
click on graphs
below for larger version
Event Factors 2006
Source: NATS Division of Safety
Event Factors 2007
Source: NATS Division of Safety
Event Factors 2008
Source: NATS Division of Safety
Event Factors 2009
Source: NATS Division of Safety
Event Factors January 2010
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