All,
Miles Majister has it correct.
The Lear 40/45 Flight Controls System Chapter issued by Flight Safety, and based on information obtained from the aircraft manufacturer's Pilot Manuals and Maintenance Manuals, states the following on page 15-10;
"With the yaw damper engaged, the yaw servo generates small automatic rudder inputs to reduce and/or eliminate unwanted yaw oscillations in flight. Though not a specific callout in the crew checklist, the yaw damper should be disengaged prior to landing to eliminate undesired yaw damper feedback."
regards,
Bruce Waddington
Last edited by Bruce Waddington; 18th Jul 2009 at 18:18.