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CS 26.1 Purpose and scope

ADDITIONAL AIRWORTHINESS SPECIFICATIONS FOR OPERATIONS · Regulation (EU) 2015/640 · EAR revision 20 Mar 2026

IRImplementing rule

CS 26.1Purpose and scope

This CS is the standard means to show compliance of products with the requirements of Annex I (Part-26) to Commission Regulation (EU) 2015/640. (See GM1 26.1 and GM2 26.1)

IR · CS 26.1 — Regulation (EU) 2015/640 · ED Decision 2015/013/R · Part-26 Easy Access Rules · EAR revision 20 Mar 2026

GMGuidance material

GM1 26.1JAR-26 / JAR/CS-25 / FAR-25+121 / OPS / Part-26 / CS-26 / GM-26 cross-reference table

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This table is intended to be a quick cross-reference table between those requirements that are contained on the one hand in Part-26, CS-26 and GM 26, and on the other hand their ‘parent’ airworthiness code, if one exists, i.e. JAR-26, the FAA’s FAR-25 and/or FAR Part 121, as well as the related EU-OPS and the new EASA Operational requirements. This table is only indicative, and it does not pre-empt compliance with the applicable requirements, which shall be assessed by the competent authority.

JAR-26JAR-25 / CS-25FAR-25/ Part 121OPSPart-26CS-26GM-26
N/An/an/an/a26.301CS 26.301n/a
N/An/an/an/a26.305CS 26.305 (a) and (c)n/a
N/An/an/an/a26.331CS 26.331n/a
N/An/an/an/a26.370CS 26.370GM1 26.370(a)(ii)
N/An/an/an/a26.400CS 26.400GM1 26.400b
N/AJAR 25.562 CS 25.562FAR 25.562 FAR 121.311(j) Amdt 121-315CAT.IDE.A.20526.60CS 26.60GM1 26.60
N/ACS/JAR 25.571FAR 25.571n/a26.300CS 26.300(c), 26.330(c) and (d)GM1 26.300(b) and 26.330(b); GM1 26.300(c) and 26.330(c)
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.302CS 26.302n/a
N/ACS 25.571 at Amendment 19FAR 25.571 at Amendment 132n/a26.303CS 26.303 (a) and (c)GM1 26.303(a)
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.304CS 26.304 (a)n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.306CS 26.306 (a) and (d)n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.307CS 26.307 (a)(i),(ii), and (b); CS 26.307(a)(iii)and (c)n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.308CS 26.308n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.309CS 26.309n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.330CS 26.300(c), 26.330(c) and (d)GM1 26.300(b) and 26.330(b); GM1 26.300(c) and 26.330(c)
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.332CS 26.332GM1 26.332(a)(iii); GM1 26.332(c)(ii) and 26.334
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.333CS 26.333 and 26.334n/a
N/ACS/JAR 25.571 (a) and (b)FAR 25.571 (a) and (b)n/a26.334CS 26.333 and 26.334GM1 26.332(c)(ii) and 26.334
N/ACS 25.705n/an/a26.205CS 26.205GM1 26.205
N/ACS 25.851(c)n/an/a26.170CS 26.170GM1 26.170(b)
N/ACS 25.856FAR 25.856 121.312(e)n/a26.156CS 26.156GM1 26.156(a)
N/ACS 25.857 (c) & (e) CS 25.858FAR 857(c) & (e) FAR 25.858 FAR 121.314(c)n/a26.157CS 26.157n/a
JAR 26.1n/an/an/an/an/an/a
JAR 26.2n/an/an/an/an/an/a
JAR 26.3n/an/an/a26.30(b)(2)n/an/a
JAR 26.5n/an/an/an/an/an/a
JAR 26.50JAR 25.785(h), (j) & (k) at Change 8, 30/11/81 CS 25.785(g)FAR 25.785(g), Amdt 25-51, 06/03/80 FAR 121.311 (d)(f) & (g) at Change 21, 17/02/98OPS 1.730 CAT.IDE.A.20526.50CS 26.50GM1 26.50(c)
JAR 26.100JAR 25.807(d)(7) at Change 13 and Amdt 93/1 08/03/93 CS 25.807121.310(m)n/a26.100CS 26.100n/a
JAR 26.105JAR 25.813(d) to (f) at Change 8, 30/11/81 CS 25.813121.310(f)OPS 1.735 CAT.IDE.A.21526.105CS 26.105n/a
JAR 26.110JAR 25.811(a) to (d) and (f) to (g) at Change 8, 30/11/81 JAR 25.811(e) at Change 14, 27/05/94 CS 25.811121.310(b)OPS 1.815 CAT.IDE.A.27526.110CS 26.110GM1 26.110(d); GM1 26.110 (e)(4)
JAR 26.120JAR 25.812 (b),(c),(d) & (h) at Change 8, 30/11/81 JAR 25.812 (a) & (e) at Change 12, 16/06/86 CS 25.812FAR 121.310 (b),(c) & (d) at Change 21, 17/02/98OPS 1.815(a)(1) CAT.IDE.A.275(b)26.120CS 26.120n/a
JAR 26.125JAR 25.812 (f) & (g) at Change 8, 30/11/81 CS 25.812FAR 121.310 (h)(1) at Change 21, 17/02/98OPS 1.185(a)(1)(iv) and (v) CAT.IDE.A.275(b)(4) and (5)n/an/an/a
JAR 26.130CS 25.810FAR 25.2 (a) at Amdt 25-72, 20/08/90 FAR 121.310 (a) & (h)(2) at Change 21, 17/02/98OPS 1.805 CAT.IDE.A.265n/an/an/a
JAR 26.150JAR 25.791 at Change 8, 20/11/81 JAR 25.853(a) to (d) at Change 14, 27/05/94 JAR 25.853(e) at Change 13 plus Amdt 91/1, 12/04/91 JAR 25.853(f) and Appendix F at Change 14, 27/05/94 Appendix F, Part I, at Amdt 93/1, 08/03/93 Appendix F, Part II, III, IV, V at Change 13 05/10/89 CS 25.853FAR 121.312OPS 1.731 CAT.IDE.A.21026.150CS 26.150 App. FGM1 26.150 (a); GM1 26.150 (c); GM1 26.150 (d)
JAR 26.155JAR 25.855 and Appendix F, Part III at Change.13 plus Amdt 93/1, 08/03/93 CS 25.855121.314n/a26.155CS 26.155 App. Fn/a
JAR 26.160JAR 25.854 at Change.13 at Amdt 93/1, 08/03/93 CS 25.854121.308n/a26.160CS 26.160n/a
JAR 26.200JAR 25.729 at Amdt 93/1, 08/03/93 CS 25.729121.289, Amdt 121-227n/a26.200CS 26.200n/a
JAR 26.250n/a121.313(j)(1)(ii)n/a26.250n/an/a
JAR 26.260CS 25.795121.313(j)(1)(ii)OPS 1.1255 ORO.SEC.100.An/an/an/a

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GM · GM1 26.1 — Regulation (EU) 2015/640 · ED Decision 2020/023/R · Part-26 Easy Access Rules · EAR revision 20 Mar 2026

GMGuidance material

GM2 26.1Demonstration of compliance

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For the initial issue of Part-26, which is a transposition of existing JAR-26 requirements, the operators will be responsible for showing compliance. In most cases this can be done by referring to the certification basis of the aircraft or the approved changes in which the amendment level of the certification specification will indicate compliance. In any case, the JAR-26 requirements should have been implemented already by EU operators and since the CS-26 text is equivalent to the JAR-26 text, compliance with JAR-26 means also compliance with Part-26. See also Article 5 of the Commission Regulation (EU) 2015/640. In the rare case where the above possibilities are not sufficient, showing compliance by the operator directly to the NAA will be difficult. They will need to involve the design approval holder of the aircraft or the approved change as relevant. This design approval holder should then apply to the EASA for certification that the design complies with the relevant CS-26 or CS-25 paragraph, special condition or equivalent safety case. With that approval information the operator can show compliance to the NAA.

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GM · GM2 26.1 — Regulation (EU) 2015/640 · ED Decision 2024/010/R · Part-26 Easy Access Rules · EAR revision 20 Mar 2026

All rules in SUBPART A — GENERAL PROVISIONS

Consolidated from the EASA Easy Access Rules (revision 20 Mar 2026, 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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