yaw damper

[peterdrowan11 0]

I have just installed the 600/700 and have had a perfect trial flight and autoland but restarting from cold and dark the Yaw damper won't stay on and the light stays on. If I click the switch it holds for a little while and then switches back and the light stays on. Engine starts fine but no matter what I do can't get Yaw damper to hold on. I don't rememebr ever having this problem before. Is it a case of RTFM.Peter Rowan

[tcas_climb 45]

Are the IRS aligned?

[peterdrowan11 0]

Probably not as I had closed down and hadn't yet set up anything in the FMC at that point.Peter Rowan

[tcas_climb 45]

yh they need to be aligned before the yaw damper can be engaged

[henkie 0]

I'm having some trouble with the yaw damper too time from time. What helped me was to turn the yaw damper off, then switch the FLT CONTROL B to OFF and than back to ON. After that the yaw damper will come on again. I think it is some kind of a little bug.Best regards