to Resource Topics
of Canadian Aircraft
is a design change
The maintenance release for a modification
The AC 43.13 as specified data for
Approved data for major modifications
specified data (ie. SRM or AC 43.13) is not available for the major
modification or major repair, approved data will have to be used.
This means an approval document such as an;
(Repair Design Certificate)
An approval for a repair to a specific aircraft(s).
(Limited Supplemental Type Certificate)
An approval for a modification to a specific aircraft(s).
(Supplemental Type Certificate)
An approval for a modification applicable to any aircraft of a
(Parts Design Approval)
A Transport Canada approval record of a type design for a replacement
part of the same fit, form and function.
approvals are approved by Transport Canada, a delegated individual
(DAR) or delegated company (DAO). The approval can be though of
as an extension or alteration of the original aircraft type data
certificate and type design. The purpose of the approval is to show
that the modification “complies” with all pertinent
certification requirements. This is an important distinction between
mechanics (AME’s) and engineering. The purpose of the AME
is to ensure “conformity”. That is, whatever work that
is done is accomplished in accordance with some type of appropriate
data or procedures. Engineering on the other hand ensures “compliance”.
This means that the data that is being approved “complies”
with all the applicable certification requirements.
do you obtain a design change approval
is a DAR and a DAO
Why use a DAR or DAO
Standards and Approvals
Mechanics, Engineers and good design
Whose responsibility is the aircraft
Change Product Rule and the basis