- Airworthiness Approval of Attitude Heading Reference System
- Date issued
- Office of Primary Responsibility
- AIR-130, Aviation Safety - Aircraft Certification Service, Aircraft Engineering Division
This advisory circular (AC) supplements existing airworthiness approval guidance for attitude heading reference system (AHRS) articles approved under technical standard order (TSO)?C201, Attitude Heading Reference System, or later revisions. TSO-C201 includes performance standards for non-gimbaled attitude, heading, and turn and slip systems.
- AC 20-181 (PDF)