Airworthiness Approval of Attitude Heading Reference System (AHRS) Equipment
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.
Airworthiness Approval of Synthetic Vision Guidance System
In this advisory circular (AC), the Federal Aviation Administration (FAA) provides applicants with guidance for obtaining airworthiness approval for equipment installation of a Synthetic Vision Guidance System (SVGS) in aircraft. This AC only provides airworthiness guidance to applicants for eligible SVGS for use on Special Authorization (SA) Category (CAT) I Instrument Landing System (ILS) approaches. Operational approval must still be obtained from the Flight Standards Service.