Published date: 18 January 2022


This AC describes an acceptable means of compliance with Part 21 Certification of Products and Parts.

Related rules

This AC relates specifically to Civil Aviation Rule Part 21 Subpart H – Airworthiness Certificates, Rule 21.173(5) Special category–amateur-built airworthiness certificate, and Rule 21.197 Special category–amateur-built certification requirements.

Change notice

Revision 3 is a complete re-issue with many updated sections to reflect the latest CAA and Federal Aviation Authority (FAA) interpretations and guidelines.