I seem to have been having a problem with the yaw damper, even prior to SP1b. I'm sure it's finger trouble rather than a problem with the plane, but when I switch on the yaw damper the light comes on and after a couple of seconds the light goes off again and the switch returns to it's off position. I thought I was switching the yaw damper on at the correct time. I usually perform this action at the end of preparing everything on the overhead CP, just prior to entering data into the CDU and before engine start. Can someone please offer some advice on this, thanks fellas.

Do you try to switch the yaw damper on prior to engine startup?

Hi Steffan, sure.... I was always under the impression this was the correct procedure... is this not the case?

Just switch it on after all hydraulic systems are powerd and it should work. That´s how it works at least on my side.

Mmm, OK, I did think I was following that procedure. I'll make a point on my next flight and swtich it on just prior to engine start, thanks for the help Steffan.

swtich it on just prior to engine start

I meant after engine start. :(

LOL, Ok, thanks again...