Originally Posted by
Gysbreght
I would think that virtually ANY change to an approved type design requires an amendment to the Type Certificate. See the B737 Type Certification Data Sheet (TCDS) on the FAA website:
Yes, of course.
But the poster's point was that having to amend an existing TC is greatly preferable to the FAA/EASA saying that the manufacturer has changed so much that it's essentially a new type and has to be certificated from scratch.