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21L.A.86 Requirements for approval of a supplemental type certificate

Annex Ib · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

IRImplementing rule

21L.A.86Requirements for approval of a supplemental type certificate

(a)In order to be issued with a supplemental type certificate, the applicant shall:

1.demonstrate their design capability in accordance with point 21L.A.83;

2.demonstrate that the change to a type certificate and the areas affected by the change comply with the type-certification basis and the applicable environmental protection requirements, as established by the Agency in accordance with point 21L.B.101;

3.demonstrate compliance in accordance with point 21L.A.85;

4.if the applicant has specified that they provided certification data on the basis ofan arrangement with the owner of the type-certification data in accordance with point 21L.A.84(b), demonstrate that the type-certificate holder:

(i)has no technical objection to the information submitted under point 21L.A.65; and

(ii)has agreed to collaborate with the applicant to ensure the discharge of all the obligations for continued airworthiness of the changed product through compliance with points 21L.A.28 and 21L.A.88;

5.demonstrate that there are no unresolved issues from the physical inspection of the first article of that product in the final changed configuration carried out by the Agency in accordance with point 21L.A.85(e)(3).

(b)A supplemental type certificate shall be limited to the specific configuration(s) in the type certificate to which the related major change relates.

IR · 21L.A.86 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1358 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMCAcceptable means of compliance

AMC1 21L.A.86Requirements for approval of a supplemental type certificate

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(a)For supplemental type certificates (STCs) approved by EASA, the AMC and GM to point 21L.A.25 should be followed by the applicant.

(b)In accordance with point 21L.A.86(b), the compliance-demonstration process must always cover the specific configuration(s) in the type certificate (TC) to which the STC under approval is applied. This (these) configuration(s) should be defined by the change to the type certificate considering the type certificate data sheet (TCDS) and the relevant optional installations. The demonstration of compliance covers this (these) applicable specific configuration(s). Consequently, the approval of the STC excludes any other configurations, in particular those that already exist, but are not considered in the compliance-demonstration process, as well as those that may be certified in the future.

(c)For STCs approved by the design organisation approval (DOA) holder under its privilege as per point 21.A.263(c)(9) of Annex I (Part 21), the process described under AMC No 2 to 21.A.263(c)(5), (8) and (9) applies.

AMC · AMC1 21L.A.86 — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMCAcceptable means of compliance

AMC1 21L.A.86(a)(5)Requirements for approval of a supplemental type certificate

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For the demonstration by the applicant that there are no unresolved issues, see AMC1 21L.A.27(d).

AMC · AMC1 21L.A.86(a)(5) — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

All rules in SECTION A - TECHNICAL REQUIREMENTS

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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