Published date: 30 September 2015


This Advisory Circular (AC) describes an acceptable means of compliance with the special category airworthiness certification requirements under Civil Aviation Rule Part 21 Subpart H.

Related rules

This AC relates specifically to Civil Aviation Rule Part 21 Subpart H Airworthiness Certificates.

Change notice

Revision 3 makes the following changes to this AC.

  • Introduces the additional subcategories of special category to align with the updated requirements of Part 21.
  • Deletes reference to special flight permits which are now covered in AC21-9.
  • Re-numbers headings and subheadings as part of a systematic update to standardise the formatting of all ACs. The renumbering is intended to clarify the content of the AC.