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> He maintained that all accidents are a result of a series of events, all of which would have to occur for there to be a crash. That statement is a truism to

> He maintained that all accidents are a result of a series of events, all of which would have to occur for there to be a crash. That statement is a truism to deflect blame. He also blamed the pilots for not following the checklist.

Someone1234 7y ago
They followed Boeing's checklist in one of the two, and still crashed. Boeing's checklist doesn't account for high aerodynamic loads on the horizontal stabilizer making manual trim adjustment difficult to impractical. Ethiopian is an interesting crash because they followed Boeing's procedure, were still in imminent danger, and then had to diverge from procedure (i.e. re-enable electronic trim to electronic adjust) but that only worsened the problem since MCAS's five second delay had elapsed. I'd hope we're well passed blaming pilots for this one. Even Lion Air's maintenance team might deserve a little slack, as the MCAS system kept on switching between faulty AoA sensor and working one every time the aircraft was restarted, meaning the maintenance team might not have been able to reproduce the issue.
- bgirard 7y ago
  I'm well aware. Because of the reasons you state, I was surprised that he mentioned this again in the video.
- kayfox 7y ago
  >> They followed Boeing's checklist in one of the two, and still crashed. They did not follow it completely, the last item is to leave the cutout switches in cutout, which they did not. They cut the electric trim back in and inexplicably did not correct the trim or further manage it. I suspect that Crew Resource Management was not effective at that point and both pilots were distracted.
  - Someone1234 7y ago
    You didn't read the post you replied to. The pilots being forced to diverge (and why) in order to recover the aircraft was discussed. > They cut the electric trim back in and inexplicably did not correct the trim or further manage it. That's incorrect. They did in fact apply manual trim adjustments after the trim cutout were reset (see the graph on page 26, specifically the TRIM UP-MAN). > I suspect that Crew Resource Management was not effective at that point and both pilots were distracted. And I suspect you haven't read enough about this topic (or half read it like the post you're replying to) and are jumping to unfounded conclusions.

Someone1234 7y ago

They followed Boeing's checklist in one of the two, and still crashed. Boeing's checklist doesn't account for high aerodynamic loads on the horizontal stabilizer making manual trim adjustment difficult to impractical. Ethiopian is an interesting crash because they followed Boeing's procedure, were still in imminent danger, and then had to diverge from procedure (i.e. re-enable electronic trim to electronic adjust) but that only worsened the problem since MCAS's five second delay had elapsed. I'd hope we're well passed blaming pilots for this one. Even Lion Air's maintenance team might deserve a little slack, as the MCAS system kept on switching between faulty AoA sensor and working one every time the aircraft was restarted, meaning the maintenance team might not have been able to reproduce the issue.

bgirard 7y ago
I'm well aware. Because of the reasons you state, I was surprised that he mentioned this again in the video.
kayfox 7y ago
>> They followed Boeing's checklist in one of the two, and still crashed. They did not follow it completely, the last item is to leave the cutout switches in cutout, which they did not. They cut the electric trim back in and inexplicably did not correct the trim or further manage it. I suspect that Crew Resource Management was not effective at that point and both pilots were distracted.
- Someone1234 7y ago
  You didn't read the post you replied to. The pilots being forced to diverge (and why) in order to recover the aircraft was discussed. > They cut the electric trim back in and inexplicably did not correct the trim or further manage it. That's incorrect. They did in fact apply manual trim adjustments after the trim cutout were reset (see the graph on page 26, specifically the TRIM UP-MAN). > I suspect that Crew Resource Management was not effective at that point and both pilots were distracted. And I suspect you haven't read enough about this topic (or half read it like the post you're replying to) and are jumping to unfounded conclusions.