Always refer to the specific, revision-controlled installation manual provided with the specific Supplemental Type Certificate (STC) for your aircraft model.
Ensure the yoke-mounted Autopilot Disconnect (AP DISC) switch instantly breaks power to the servo clutches under all flight regimes.
: This system is rate-based and requires a compatible S-TEC turn coordinator to function as the primary sensor. 🛠️ Component Overview The typical installation includes: S-tec 55x Installation Manual
The panel-mounted control head that contains the microprocessor, mode selectors, and internal pressure sensors for altitude hold.
The installation process is not complete until a functional flight check is conducted and logged. The manual outlines specific tracking tests: : Detailed pre-flight and in-flight procedures for the
The primary sensor for roll axis control.
: Detailed pre-flight and in-flight procedures for the System 55X can be found at Pacific Flying Club Arrow Aviation Troubleshooting Guide Absolute Pressure Transducer
The S-TEC 55X installation manual is a highly specialized technical document that is by the manufacturer, Genesys Aerosystems . It is only provided to authorized S-TEC dealers as part of a mandatory STC (Supplemental Type Certificate) documentation package . Manual Access and Procurement
With the aircraft perfectly level on the ground and the controls centered, the installer must perform a "null adjustment." This ensures that when the autopilot commands zero movement, the servos receive exactly zero volts, preventing the system from drifting or creeping on its own. 6. Ground Testing and Pre-Flight Checks
While primarily for operation, the POH includes essential Pre-Flight and Power-Up Tests (Section 2) required to verify a successful installation.
Roll and Pitch Servos, Absolute Pressure Transducer, and an A/P Disconnect switch.