Originally Posted by
bjtdrvr
That doesn't affect your actual flight controls just your instrumentation.
It affects your flight controls at altitude. The airplane violently Dutch rolls if you lose the yaw damper. NetJets had a couple of events like that. The GPS and AHRS are tied together so if there is a complete loss of GPS signal you lose AHRS which kicks off the autopilot and you lose the yaw damper. Only at like 24,000 feet do you start regaining control.