Originally Posted by
Derfred
It’s off topic, but I don’t think that’s the reason for the nose up pitch trim at 400RA.
I think the reason is to allow the aircraft to pitch up gently rather than crashing onto the runway in the event of a autoland flare failure (given that it is only dual autopilot) if there is no pilot input after autopilot dropout during the flare.
And it’s not a massive trim input, it’s a small trim input easily handled by a pilot.
Hi derfred,
The reason for mentioning it was to illustrate the way Boeing is willing to mess with trim to achieve certification.
By the way a No flare situation doesn’t allow you to let the aircraft somehow land - that’s a go around.
And as for the input being
easily handled, it causes one more distracting problem as mentioned in my post, in a subsequent manual single engined go around.
The auto land itself was very sketchy too - nothing like the smooth MD-80 performance - which was achieved without heavy handed trim inputs.