JayG asked: I always thought that the yaw damper should be off for takeoff and landing, but someone in another un-named forum says it should be on, what does the real expert say?

Jay, I never flew the 737, but all the other Boeing planes I flew had the damper on all the time except the 707 where it was a part-time yaw damper. In fact the 727 needed both dampers at altitude or it was a wild ride. If one of the dampers in the 727 failed, you slowed down and go down right now.

Lou