Cruise
Well-Known Member
I've also got to add, with regard to the thing that finally killed the 3407 crew: reducing power for the approach.
If you've never done this yourself before, you either have auto throttles that won't let you, or you didn't notice when you pulled the power back to slow and got distracted by something.
I've done it before, though I obviously only lost a few knots before realizing what was happening. I've seen captains do it, and a quick "check speed" gets us back on profile.
When you do idle descents for long periods of time, it'll happen eventually. When you do decelerating approaches for long enough, it'll happen eventually. Hell, right after 3407 we had a crew do the exact same thing, but recovered from the shaker properly.
Were they bad pilots? No, they were distracted by figuring out how to not run headlong into a thunderstorm. It's EASY to end up having both sets of eyes outside the aircraft trying to figure out how to fix something.
Instead of lambasting our pilots, we put this into our CRM program and learned how to try to prevent it from happening again, because it could have been any of us.
Yep, it's called Mixed Mode Automation. We fly these highly automated, fully RNAV/VNAV aircraft and they lack auto thrust/ auto throttles. It's a design flaw of major proportion.
It only takes a small distraction while on decent or approach to miss bringing the power back in and in no time, you've got a big problem on your hands. Definitely one of the factors in the Colgan accident.