. What was the cause of the incident shown in Figure 2? That incident, in which no one was injured, occurred in an Airbus 320 airplane that was flown by Lufthansa Airlines out of an airport in Germany. It would be illogical to conclude from this one incident that it is dangerous to fly Airbus 320s, Lufthansa, or out of Germany. Suppose, however, that you wanted to determine whether there is a systematic pattern of maintenance problems with the A320, Lufthansa, or airports in Germany. How would you proceed? How would you use the resources of aviation-safety.net to make this determination?