---
title: "CS 26.156 Thermal/acoustic insulation materials — ADDITIONAL AIRWORTHINESS SPECIFICATIONS FOR OPERATIONS, Part-26 · Avioverse"
description: "Compliance with point 26.156(a) of Part-26 is demonstrated by complying with CS 25.856(a), or its equivalent."
url: "https://avioverse.aero/regulations/easa/additional-airworthiness/additional-airworthiness-specifications-for/subpart-b/cs-26-156"
---

# CS 26.156 Thermal/acoustic insulation materials

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

IR Implementing rule

## CS 26.156 Thermal/acoustic insulation materials

(a) Compliance with point 26.156(a) of Part-26 is demonstrated by complying with CS 25.856(a), or its equivalent.

(b) Compliance with point 26.156(b) of Part-26 is demonstrated by complying with CS 25.856(a), or its equivalent.

(c) Compliance with point 26.156(c) of Part-26 is demonstrated by complying with CS 25.856(b), or its equivalent.

\[Issue: 26/2]

\[Issue: 26/3]

IR · CS 26.156 — Regulation (EU) 2015/640 · ED Decision 2020/023/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.