> was to refute the above idea that the engine defect was not the root cause You misunderstand what a root cause is. An accident has multiple root causes in th

> was to refute the above idea that the engine defect was not the root cause You misunderstand what a root cause is. An accident has multiple root causes in the swiss cheese model. Each process update is supposed to address a root cause. This is separate from contributing factors. IE: It happened at night.