The system is "Rate Based." The installation manual emphasizes that the Turn Coordinator must be isolated from the aircraft’s vacuum system (if equipped) as it is electrically powered to ensure autopilot functionality even during vacuum system failures.
Procedures to test the system after installation to ensure it operates correctly.
S-TEC 55X Installation Manual: A Comprehensive Guide for Avionics Technicians
If integrating with glass cockpits (e.g., Garmin GNS 430 or Sandel HSI), refer to the System 55X Troubleshooting Guide for correct ARINC 429 configuration and internal settings. AP-S-TEC-Fifty-Five-X-Manual.pdf - Pacific Flying Club
