Installation of a dual Universal Avionics Systems Corporation AHS-525 Attitude and Heading Reference System (AHRS) in accordance with Pentastar Aviation Master Data List, Document No. A-16738-001, Rev. A, dated December 19, 2018, or later FAA approved revision. View PDF on drs.faa.gov ↗

The STC PDF is authoritative: installation instructions, ICA requirements and limitations.