Published date: 12 August 2022


This Advisory Circular (AC) describes an acceptable means of compliance with Civil Aviation Rule Part 43 General Maintenance Rules and Part 21 Certification of Products when applying for approval of and/or embodying modifications and repairs.

This material is intended for those persons wishing to have technical data approved and to perform modifications and repairs.

Related rules

This AC relates specifically to Part 43 Subpart E, and Part 21 Subparts C, M, and N.

Change notice

Revision 5 updates terminology and advice on Acceptable Technical Data (ATD) throughout.

Cancellation notice

This AC cancels AC43-9, Rev 4, dated 4 April 2019.