![](https://butlernational.com/wp-content/uploads/2023/10/DSC0028-1024x683.jpg)
Trim Coupler board for the FC-110 Autopilot.
Butler National provides FAA-approved obsolescence engineering solutions from board-level designs to complete aircraft system retrofits. The Trim Coupler was cost-effectively redesigned, manufactured, and recertified for certain Learjet autopilots.