Excellent. So in what cases does seeing the engine visually do help? So far we discussed UPS2976 and UA1175 where the presence or absence of the camera didn't change the outcome.

> Regarding UA1175, they had someone extra, but not all flights happen to have someone extra in the cockpit.

You are dancing around my question. What does the pilot do differently based on what they see? If you can't articulate a clear "pilot sees X they do Y, pilot sees Z they do Q" flow then what is the video good for?

in a sibling thread you say "There are countless situations where it can be helpful." But you haven't named even one of those countless situations yet.

I think that statement needs the support of actual evidence. Air incident investigation agencies make detailed reports of the causes of crashes, with specific, targeted recommendations to help ensure that similar incidents don't recur.

If we haven't seen recommendations for cameras like that, then I think it's reasonable to assume that the actual experts here have determined that cameras would not be helpful.