---
title: "CS 26.304(a) CPCP — ADDITIONAL AIRWORTHINESS SPECIFICATIONS FOR OPERATIONS, Part-26 · Avioverse"
description: "Compliance with point 26.304 of Part26 is demonstrated by complying with CS 25.571 Amendment 19 or subsequent amendment, or with points (a) or (b) of…"
url: "https://avioverse.aero/regulations/easa/additional-airworthiness/additional-airworthiness-specifications-for/subpart-b/cs-26-304-a"
---

# CS 26.304(a) CPCP

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

IR Implementing rule

## CS 26.304(a) CPCP

Compliance with point 26.304 of Part26 is demonstrated by complying with CS 25.571 Amendment 19 or subsequent amendment, or with points (a) or (b) of this CS:

(a) A baseline CPCP is established according to AMC 2020A Paragraph 9 or equivalent means, which includes a statement that requires to control corrosion to Level 1 or better, and is submitted to EASA for approval.

(b) A baseline CPCP already exists for the type that is either approved by EASA through the maintenance review board (MRB) and industry steering committee (ISC) using existing procedures for EASA maintenance review board report (MRBR) approval or through an existing EASA AD.

\[Issue: 26/3]

\[Issue: 26/5]

IR · CS 26.304(a) — Regulation (EU) 2015/640 · ED Decision 2024/010/R · Part-26 Easy Access Rules · EAR revision 20 Mar 2026

[All rules in SUBPART B — AEROPLANES](https://avioverse.aero/regulations/easa/additional-airworthiness/additional-airworthiness-specifications-for/subpart-b)

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.