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15 Figure 9. Accident and incident database for aircraft veer-offs. longer need to rely on simple crash rates based on only aircraft, craft runway distance required for the operation. The runway engine, or operation type. distance available was gathered for each accident, incident, and normal operation based on airport data. Aircraft performance data were gathered from various Aircraft Data sources, including aircraft manufacturers' websites and the The runway veer-off models incorporate an important following databases: factor to address the impact of aircraft performance and available runway length on the probability of veer-off incidents. FAA Aircraft Characteristics Database For many of these events, particularly those taking place Eurocontrol Aircraft Performance Database V2.0 during the landing phase, if the runway length available is FAA Aircraft Situation Display to Industry--Aircraft Types close to the runway length required by the aircraft for the Boeing Airplane Characteristics for Airport Planning operation, there may be a higher probability that a veer-off Airbus Airplane Characteristics for Airport Planning will take place because the safety margin is lower and more Embraer Aircraft Characteristics for Airport Planning intense braking is required. Two factors were included in the models that required Aircraft performance data were used to develop the proba- additional data on aircraft performance: the runway distance bility models. A summary of the aircraft database is presented available for the operation (takeoff or landing) and the air- in Appendix F.