S-tec 55x Installation Manual Review

Using a tensiometer, technicians must verify the servo slip-clutch settings. This ensures the pilot can "overpower" the autopilot in an emergency.

The S-TEC System 55X is one of the most popular high-performance autopilots for general aviation. Known for its reliability and smooth handling, it is a rate-based system that integrates seamlessly with many flight decks. However, the performance of the 55X is entirely dependent on a precise installation. S-tec 55x Installation Manual

Once the hardware is in, the manual guides the technician through a series of "bench tests" while the aircraft is still on the ground: Using a tensiometer, technicians must verify the servo