S-tec — 55x Installation Manual

Use bridle cables and extension attachments to connect servos to the aircraft's primary flight control and trim systems.

Verify the yoke-mounted disconnect button kills power to the servos immediately. 🛩️ Flight Calibration

The is the definitive technical reference for certified avionics installers and maintenance personnel responsible for integrating the S-TEC 55X two-axis autopilot into general aviation aircraft. Originally developed by S-TEC and now supported by Genesys Aerosystems, this manual provides comprehensive, FAA-acceptable data for the physical and electrical installation of one of the most popular rate-based autopilots in the industry. S-tec 55x Installation Manual

Confirm that a "Left" command on the programmer actually moves the ailerons to initiate a left turn.

The S-TEC System Fifty Five X is a two-axis, digital autopilot system widely used in the retrofit market for general aviation aircraft ranging from single-engine pistons to light twins. Unlike older analog systems, the 55X utilizes a digital computer to process attitude and heading information, offering features such as altitude hold, vertical speed selection, GPS steering (GPSS), and precision approach coupling. Use bridle cables and extension attachments to connect

This 42-page manual dated October 29, 2013, includes parts lists for the main wire harness, turn coordinator, pressure transducer, and servo kits.

A guide to common issues that might arise and steps to resolve them. Originally developed by S-TEC and now supported by

The unit is designed for standard radio stack mounting. The manual specifies the "keep-out" zones to avoid electromagnetic interference (EMI) from other avionics, like high-power COM radios. Servo Installation This is the most labor-intensive part of the manual.