CS 26.303(a) and (c) Limit of validity

• ED Decision 2020/023/R found in: CS-26 Additional Airworthiness Specifications for Operations (No 2015/640) Part-26 (Mar 2023)
• ED Decision 2024/010/R found in: CS-26 Additional Airworthiness Specifications for Operations (Part-26) (Oct 2025)

CS 26.303(a) and (c) Limit of validity ED Decision 2020/023/R Compliance with points [26.303(a) and (c)](#_DxCrossRefBm881534093) of Part-26 is demonstrated by complying with CS 25.571 Amendment 19, or subsequent amendment, or with the following: (a) The evaluation supporting the LOV required by point [26.303](#_DxCrossRefBm881534093) of Part-26 includes a substantiation that WFD will not occur in the aeroplane structure. An ALS exists and includes the LOV of each aeroplane structural configuration required by point [26.303](#_DxCrossRefBm881534093) of Part-26 and each LOV is supported by sufficient test evidence, analysis and, if available, service experience and teardown inspection results of high-time aeroplanes of similar structural design, accounting for differences in operating conditions and procedures. Where the certification basis of the aeroplane includes mixed requirements with respect to the CS/CFR Part 25/JAR 25.571 amendment status, the earliest amendment is used to define the compliance times. (b) A list is established of all the maintenance actions upon which the LOV is dependent. The list identifies existing mandated actions, existing actions that have not been mandated at the date of entry into force of the rule and any new maintenance actions required. A schedule for the development and submission of the maintenance actions to EASA is agreed by EASA prior to the approval of the LOV. For compliance times, refer to points [26.303(b) or 26.303(d) and 26.303(e)](#_DxCrossRefBm881534093) of Part-26, as applicable. The new maintenance actions are established, and, together with the existing non-mandated actions, are submitted to EASA for approval according to the schedule agreed by EASA. (c) Additional means of compliance are provided by Paragraph 8 of and Appendix 2 to AMC 20-20A. [Issue: 26/3] #### CS 26.303(a) and (c) Limit of validity *ED Decision 2024/010/R* Compliance with points [26.303(a) and (c)](#_DxCrossRefBm783605493) of Part‑26 is demonstrated by complying with CS 25.571 Amendment 19, or subsequent amendment, or with the following: (a) The evaluation supporting the LOV required by point [26.303](#_DxCrossRefBm783605493) of Part‑26 includes a substantiation that WFD will not occur in the aeroplane structure. An ALS exists and includes the LOV of each aeroplane structural configuration required by point [26.303](#_DxCrossRefBm783605493) of Part‑26 and each LOV is supported by sufficient test evidence, analysis and, if available, service experience and teardown inspection results of high-time aeroplanes of similar structural design, accounting for differences in operating conditions and procedures. Where the certification basis of the aeroplane includes mixed requirements with respect to the CS/CFR Part 25/JAR 25.571 amendment status, the earliest amendment is used to define the compliance times. (b) A list is established of all the maintenance actions upon which the LOV is dependent. The list identifies existing mandated actions, existing actions that have not been mandated at the date of entry into force of the rule and any new maintenance actions required. A schedule for the development and submission of the maintenance actions to EASA is agreed by EASA prior to the approval of the LOV. For compliance times, refer to points [26.303(b) or 26.303(d)](#_DxCrossRefBm783605493) of Part‑26, as applicable. The new maintenance actions are established, and, together with the existing non-mandated actions, are submitted to EASA for approval according to the schedule agreed by EASA. (c) Additional means of compliance are provided by Paragraph 8 of and Appendix 2 to AMC 20‑20A. [Issue: 26/3] [Issue: 26/5]