dennis muilenburg latched onto findings that inexperience and lack of training were part of a chain ofnds of pilots and in some cases our system safety analysis includes not only the engineering design but also the actions that pilots would take as part of a failure scenario. beginning was that even thoughe the pilots did not know that mcas existed, that they did not need to know that. >> and in some cases, those procedures were not completely followed. >> boeing believed that the pilot should have been able to realize that it was very similar to a runaway stabilizer situation. >> narrator: runaway stabilizer is an aviation term for a malfunctioning stabilizer. after the lion air crash, boeing had issued a directive to pilots to be aware of this possibility, and told them what to do if it happened. >> when that part of the tail was not acting the way that it should be, you take manual control of it. >> the pilots could have stopped their rollercoaster ride by turning these two switches off. >> to shut off power to the stabilizer, you stop it from moving on its own. and then you start c