structural failures, how common is it it s repair or maintenance related. we re finding more and more where it s repair related. there were at least two suicides in the wake of this incident. a japan airlines employee who was working with victims families and an inspection engineer who issued a certificate of air worthiness for the doomed plane after the 1978 tail strike. to this day, jal 123 remains the deadliest single aircraft accident in the history of aviation. we ve seen the disastrous results of airplanes not properly repaired, maintained or inspected. japan airlines flight 123. american flight 191. aloha flight 242. we ve also seen what can happen when a plane has a design flaw but those flights are the exception, not the rule. every day, 3 million passengers