Installing a KI 256 is not a simple "plug and play" task. To ensure the autopilot tracks correctly, a system alignment is typically required: Field Alignment : Alignment should ideally be done at the aircraft using a gyro tilt stand
: Specific updates, such as Service Bulletin KI 256-11 , may require replacing the internal PC board to reduce loading effects on pitch and roll outputs. Documentation & Resources ki 256 installation manual