Installation Manual Repack — S-tec 55x

Install a dedicated, pull-type autopilot circuit breaker (typically 5-Amp for 14V systems or 3-Amp for 28V systems).

The servo output arm must be perfectly aligned with the aircraft’s control linkages to prevent over-centering.

The S-TEC 55X is a rate-based, fully integrated flight control system. Unlike position-based autopilots that rely primarily on attitude indicators, a rate-based system derives its roll information from a turn coordinator. This makes the system highly reliable, as it remains operational even in the event of a vacuum system or primary attitude indicator failure. S-tec 55x Installation Manual

Turn the heading bug to the left. The control wheel should rotate smoothly to the left. Push the pitch control forward; the trim system should respond appropriately to compensate for the perceived pressure. 5. Troubleshooting Common Installation Errors

The final, and legally binding, phase of the installation is completing the required paperwork and aircraft documentation updates. The control wheel should rotate smoothly to the left

Installed in the wings or fuselage to control the ailerons.

: Includes a pressure transducer for altitude hold functions. CWS (Control Wheel Steering)

: Pitch and Roll servos with specific mounting brackets for your airframe.

Adjusts how aggressively the autopilot responds to deviations from the heading bug.

: External switches for AP Disconnect, CWS (Control Wheel Steering), and Trim Master. 🔌 Wiring & Pinout Essentials

Install safety wire on all turnbuckles and critical attachment points.