> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/autopilot-guide/yaw-damper-yd.md).

# Yaw Damper (YD)

The yaw damper is automatically engaged after power-up of either hydraulic system 1 or 3. The yaw damper is automatically disengaged after shutdown of both hydraulic system 1 and 3. The yaw damper may also be disengaged/engaged by pressing the YD button on the AFCS guidance control panel.