21.A.91 Classification of changes to a type-certificate
Regulation
(EU) 2019/897
Changes to a type-certificate are
classified as minor and major. A “minor change” has no appreciable effect on
the mass, balance, structural strength, reliability, operational
characteristics, operational suitability data, or other characteristics affecting
the airworthiness of the product or its environmental characteristics. Without
prejudice to point 21.A.19, all other
changes are “major changes” under this Subpart. Major and minor changes shall
be approved in accordance with points 21.A.95
or 21.A.97, as appropriate, and shall
be adequately identified.