The outcome is the effect of a hazard and the undesirable result the airport wants to avoid or
control. Describing the outcome is always the first step in defining the risk. In this case, the outcome
can be defined as “an aircraft accident resulting from a runway excursion.” According to
NTSB, an aircraft accident is “an occurrence in which any person suffers death or serious injury,
or the aircraft receives substantial damage.” If the event results in no death or serious injury and
the aircraft receives no substantial damage, the event is considered an aircraft incident.