---
title: "Appendix O Supercooled Large Drop icing conditions — CS-25 · Avioverse"
description: "Appendix O consists of two parts. Part I defines Appendix O as a description of supercooled large drop (SLD) icing conditions in which the drop median…"
url: "https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25/appendix-o"
---

# Appendix O Supercooled Large Drop icing conditions

Large Aeroplanes (CS-25) · CS-25 · EAR revision 26 Jan 2023

Appendix Appendix

## Appendix O Supercooled Large Drop icing conditions

Appendix O consists of two parts. Part I defines Appendix O as a description of supercooled large drop (SLD) icing conditions in which the drop median volume diameter (MVD) is less than or greater than 40 μm, the maximum mean effective drop diameter (MED) of Appendix C continuous maximum (stratiform clouds) icing conditions. For Appendix O, SLD icing conditions consist of freezing drizzle and freezing rain occurring in and/or below stratiform clouds. Part II defines ice accretions used to show compliance with CS-25 specifications.

\[Amdt 25/16]

APPENDIX · Appendix O — CS-25 · ED Decision 2015/008/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in APPENDICES TO CS-25](https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25)

Consolidated from the EASA Easy Access Rules (revision 26 Jan 2023, 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.