This AC describes and acceptable means of compliance with Civil Aviation Rule Part 21 Certification of Products and Parts in respect of the approval of aircraft ferry fuel systems and overweight operation modifications. Each reference to a number in this AC, such as 21.505, is a reference to a specific rule within Part 21.
This AC relates specifically to Part 21 Certification of Products and Parts, Subpart C – Design Changes, the approval of aircraft modifications, and also to Part 91 General Operation and Flight Rules.
Revision 1 re-numbers this AC from AC21-05 to AC21-5 as part of a project to standardise the numbering of all ACs.
