---
title: "Appendix 6 Acronyms and definitions — CS-25 · Avioverse"
description: "AC Advisory Circular AFM Aeroplane Flight Manual ATTCS Automatic Takeoff Thrust Control System FAA Federal Aviation Administration ICTS Ice-Contaminated…"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-b/appendix-6"
---

# Appendix 6 Acronyms and definitions

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

Appendix Appendix

## Appendix 6 Acronyms and definitions

| AC    | Advisory Circular                                                                                                                                                                                    |
| ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| AFM   | Aeroplane Flight Manual                                                                                                                                                                              |
| ATTCS | Automatic Takeoff Thrust Control System                                                                                                                                                              |
| FAA   | Federal Aviation Administration                                                                                                                                                                      |
| ICTS  | Ice-Contaminated Tailplane Stall.                                                                                                                                                                    |
| LWC   | Liquid Water Content                                                                                                                                                                                 |
| MED   | Mean Effective Diameter                                                                                                                                                                              |
| MVD   | Median Volume Diameter                                                                                                                                                                               |
| CL    | Lift Coefficient                                                                                                                                                                                     |
| CLMAX | Maximum Lift Coefficient                                                                                                                                                                             |
| Trim  | A flight condition in which the aerodynamic moment acting about the axis of interest is zero. In the absence of an external disturbance no control input is needed to maintain the flight condition. |

\[Amdt 25/16]

APPENDIX · Appendix 6 — CS-25 · ED Decision 2015/008/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART B – FLIGHT](https://avioverse.aero/regulations/easa/cs-25/subpart-b)

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.