IRImplementing rule
21.A.117Changes to that part of a product covered by a supplemental type-certificate
(a)Minor changes to that part of a product, an UAS or a CMU that is covered by a supplemental type-certificate shall be classified and approved in accordance with Subpart D.
(b)Each major change to that part of a product, an UAS or a CMU that is covered by a supplemental type- certificate shall be approved as a separate supplemental type-certificate in accordance with this Subpart.
(c)By way of derogation from point (b), a major change to that part of a product, an UAS or a CMU that is covered by a supplemental type-certificate submitted by the supplemental type-certificate holder itself may be approved as a change to the existing supplemental type-certificate.
IR · 21.A.117 — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025