--- title: "CS 26.1 Purpose and scope — ADDITIONAL AIRWORTHINESS SPECIFICATIONS FOR OPERATIONS, Part-26 · Avioverse" description: "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." url: "https://avioverse.aero/regulations/easa/additional-airworthiness/additional-airworthiness-specifications-for/subpart-a/cs-26-1" --- # CS 26.1 Purpose and scope ADDITIONAL AIRWORTHINESS SPECIFICATIONS FOR OPERATIONS · Regulation (EU) 2015/640 · EAR revision 20 Mar 2026 IR Implementing rule ## CS 26.1 Purpose 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 GM Guidance material ## GM1 26.1 JAR-26 / JAR/CS-25 / FAR-25+121 / OPS / Part-26 / CS-26 / GM-26 cross-reference table 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-26 | JAR-25 / CS-25 | FAR-25/ Part 121 | OPS | Part-26 | CS-26 | GM-26 | | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------- | ----------- | -------------------------------------------------------- | -------------------------------------------------------- | | N/A | n/a | n/a | n/a | 26.301 | CS 26.301 | n/a | | N/A | n/a | n/a | n/a | 26.305 | CS 26.305 (a) and (c) | n/a | | N/A | n/a | n/a | n/a | 26.331 | CS 26.331 | n/a | | N/A | n/a | n/a | n/a | 26.370 | CS 26.370 | GM1 26.370(a)(ii) | | N/A | n/a | n/a | n/a | 26.400 | CS 26.400 | GM1 26.400b | | N/A | JAR 25.562 CS 25.562 | FAR 25.562 FAR 121.311(j) Amdt 121-315 | CAT.IDE.A.205 | 26.60 | CS 26.60 | GM1 26.60 | | N/A | CS/JAR 25.571 | FAR 25.571 | n/a | 26.300 | CS 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/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.302 | CS 26.302 | n/a | | N/A | CS 25.571 at Amendment 19 | FAR 25.571 at Amendment 132 | n/a | 26.303 | CS 26.303 (a) and (c) | GM1 26.303(a) | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.304 | CS 26.304 (a) | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.306 | CS 26.306 (a) and (d) | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.307 | CS 26.307 (a)(i),(ii), and (b); CS 26.307(a)(iii)and (c) | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.308 | CS 26.308 | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.309 | CS 26.309 | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.330 | CS 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/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.332 | CS 26.332 | GM1 26.332(a)(iii); GM1 26.332(c)(ii) and 26.334 | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.333 | CS 26.333 and 26.334 | n/a | | N/A | CS/JAR 25.571 (a) and (b) | FAR 25.571 (a) and (b) | n/a | 26.334 | CS 26.333 and 26.334 | GM1 26.332(c)(ii) and 26.334 | | N/A | CS 25.705 | n/a | n/a | 26.205 | CS 26.205 | GM1 26.205 | | N/A | CS 25.851(c) | n/a | n/a | 26.170 | CS 26.170 | GM1 26.170(b) | | N/A | CS 25.856 | FAR 25.856 121.312(e) | n/a | 26.156 | CS 26.156 | GM1 26.156(a) | | N/A | CS 25.857 (c) & (e) CS 25.858 | FAR 857(c) & (e) FAR 25.858 FAR 121.314(c) | n/a | 26.157 | CS 26.157 | n/a | | JAR 26.1 | n/a | n/a | n/a | n/a | n/a | n/a | | JAR 26.2 | n/a | n/a | n/a | n/a | n/a | n/a | | JAR 26.3 | n/a | n/a | n/a | 26.30(b)(2) | n/a | n/a | | JAR 26.5 | n/a | n/a | n/a | n/a | n/a | n/a | | JAR 26.50 | JAR 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, 17/02/98 | OPS 1.730 CAT.IDE.A.205 | 26.50 | CS 26.50 | GM1 26.50(c) | | JAR 26.100 | JAR 25.807(d)(7) at Change 13 and Amdt 93/1 08/03/93 CS 25.807 | 121.310(m) | n/a | 26.100 | CS 26.100 | n/a | | JAR 26.105 | JAR 25.813(d) to (f) at Change 8, 30/11/81 CS 25.813 | 121.310(f) | OPS 1.735 CAT.IDE.A.215 | 26.105 | CS 26.105 | n/a | | JAR 26.110 | JAR 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 25.811 | 121.310(b) | OPS 1.815 CAT.IDE.A.275 | 26.110 | CS 26.110 | GM1 26.110(d); GM1 26.110 (e)(4) | | JAR 26.120 | JAR 25.812 (b),(c),(d) & (h) at Change 8, 30/11/81 JAR 25.812 (a) & (e) at Change 12, 16/06/86 CS 25.812 | FAR 121.310 (b),(c) & (d) at Change 21, 17/02/98 | OPS 1.815(a)(1) CAT.IDE.A.275(b) | 26.120 | CS 26.120 | n/a | | JAR 26.125 | JAR 25.812 (f) & (g) at Change 8, 30/11/81 CS 25.812 | FAR 121.310 (h)(1) at Change 21, 17/02/98 | OPS 1.185(a)(1)(iv) and (v) CAT.IDE.A.275(b)(4) and (5) | n/a | n/a | n/a | | JAR 26.130 | CS 25.810 | FAR 25.2 (a) at Amdt 25-72, 20/08/90 FAR 121.310 (a) & (h)(2) at Change 21, 17/02/98 | OPS 1.805 CAT.IDE.A.265 | n/a | n/a | n/a | | JAR 26.150 | JAR 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 25.853 | FAR 121.312 | OPS 1.731 CAT.IDE.A.210 | 26.150 | CS 26.150 App. F | GM1 26.150 (a); GM1 26.150 (c); GM1 26.150 (d) | | JAR 26.155 | JAR 25.855 and Appendix F, Part III at Change.13 plus Amdt 93/1, 08/03/93 CS 25.855 | 121.314 | n/a | 26.155 | CS 26.155 App. F | n/a | | JAR 26.160 | JAR 25.854 at Change.13 at Amdt 93/1, 08/03/93 CS 25.854 | 121.308 | n/a | 26.160 | CS 26.160 | n/a | | JAR 26.200 | JAR 25.729 at Amdt 93/1, 08/03/93 CS 25.729 | 121.289, Amdt 121-227 | n/a | 26.200 | CS 26.200 | n/a | | JAR 26.250 | n/a | 121.313(j)(1)(ii) | n/a | 26.250 | n/a | n/a | | JAR 26.260 | CS 25.795 | 121.313(j)(1)(ii) | OPS 1.1255 ORO.SEC.100.A | n/a | n/a | n/a | \[Issue: 26/2] \[Issue: 26/3] GM · GM1 26.1 — Regulation (EU) 2015/640 · ED Decision 2020/023/R · Part-26 Easy Access Rules · EAR revision 20 Mar 2026 GM Guidance material ## GM2 26.1 Demonstration of compliance 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. \[Issue: 26/2] \[Issue: 26/5] 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](https://avioverse.aero/regulations/easa/additional-airworthiness/additional-airworthiness-specifications-for/subpart-a) Consolidated from the EASA Easy Access Rules (revision 20 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.