Why go through the trouble of using the AFL Library? Because X-Plane 11’s default failure model is a toy by comparison.
While X-Plane 11 has its own failure menu, the AFL Library overrides it. You can set: Afl Library X Plane 11
The (often associated with the developer Antonio Folco Library ) is a comprehensive collection of 3D objects, ground textures, and static aircraft designed to be used by scenery developers. Why go through the trouble of using the AFL Library