737NG Control Surface Position Indications

[SimWes]

Hi,

This is in regards to the 737NGs that have the Control Surface Position Indicator option on their Display Units.

The following has been observed on our machine.

'Control deflection display on lower DU systems page showed a small rudder deflection when tiller was turned to full deflection'

This is what we found

When the Yaw Damper is engaged and the Tiller is turned you will get an indication of Rudder deflection as well as a Yaw Damper indication.

When Yaw Damper is switched of, no deflections are shown by either indications.

What I need to know if this is correct or what should really happen.

Any help would be most appreciated.

Thanks,

WEs