---
title: "GM2 Annex I Abbreviations — Annex I, Initial Airworthiness · Avioverse"
description: "For the purpose of the AMC and GM to Part 21, the following abbreviations apply:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/general/gm2-annex-i-abbreviations"
---

# GM2 Annex I Abbreviations

Annex I · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

GM Guidance material

## GM2 Annex I Abbreviations

For the purpose of the AMC and GM to [Part 21](https://avioverse.aero/glossary/easa/part-21), the following abbreviations apply:

| AFM                                               | Aircraft flight manual                                                                                                                                    |
| ------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| AMC                                               | Acceptable means of compliance                                                                                                                            |
| APU                                               | Auxiliary power unit                                                                                                                                      |
| CEO                                               | Chief executive officer                                                                                                                                   |
| CMR                                               | Certification maintenance requirement                                                                                                                     |
| CofA                                              | Certificate of airworthiness                                                                                                                              |
| CRI                                               | Certification review item                                                                                                                                 |
| CS                                                | Certification specification                                                                                                                               |
| CS-CCD                                            | Certification Specifications for Cabin Crew Data                                                                                                          |
| CS-FCD                                            | Certification Specifications for [Operational Suitability Data (OSD)](https://avioverse.aero/glossary/easa/operational-suitability-data) Flight Crew Data |
| CS-GEN-MMEL                                       | Certification Specifications for Generic Master Minimum Equipment List                                                                                    |
| CS-MMEL                                           | Certification Specifications for Master Minimum Equipment List                                                                                            |
| CS-MCSD                                           | Certification Specifications for Maintenance Certifying Staff Data                                                                                        |
| CS-SIMD                                           | Certification Specifications for Simulator Data                                                                                                           |
| DAH                                               | Design approval holder                                                                                                                                    |
| DO                                                | Design organisation                                                                                                                                       |
| DOA                                               | Design organisation approval                                                                                                                              |
| EDTO                                              | Extended diversion time operation                                                                                                                         |
| ELOS                                              | Equivalent level of safety                                                                                                                                |
| ESF                                               | Equivalent safety finding                                                                                                                                 |
| [ETSO](https://avioverse.aero/glossary/easa/etso) | European technical standard order                                                                                                                         |
| FOD                                               | Foreign object damage                                                                                                                                     |
| HDO                                               | Head of the design organisation                                                                                                                           |
| ICAO                                              | International Civil Aviation Organization                                                                                                                 |
| ICA                                               | Instructions for continued airworthiness                                                                                                                  |
| OP                                                | Other party                                                                                                                                               |
| OSD                                               | Operational suitability data                                                                                                                              |
| PAH                                               | Production approval holder                                                                                                                                |
| PO                                                | Production organisation                                                                                                                                   |
| POA                                               | Production organisation approval                                                                                                                          |
| POATL                                             | Production organisation approval team leader                                                                                                              |
| POE                                               | Production organisation exposition                                                                                                                        |
| GM                                                | Guidance material                                                                                                                                         |
| MoC                                               | Means of compliance                                                                                                                                       |
| RCofA                                             | Restricted certificate of airworthiness                                                                                                                   |
| RTC                                               | Restricted type certificate                                                                                                                               |
| SC                                                | Special condition                                                                                                                                         |
| SMS                                               | Safety management system                                                                                                                                  |
| STC                                               | Supplemental type certificate                                                                                                                             |
| TC                                                | Type certificate                                                                                                                                          |
| TCDS                                              | Type certificate data sheet                                                                                                                               |

GM — Regulation (EU) No 748/2012 · ED Decision 2022/021/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in General provisions](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/general)

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, 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.