---
title: "21.A.151 Terms of approval — Annex I, Initial Airworthiness · Avioverse"
description: "The terms of approval shall identify the scope of work, the products or the categories of parts and appliances, or both, the CMUs or the CMU components…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-151"
---

# 21.A.151 Terms of approval

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

IR Implementing rule

## 21.A.151 Terms of approval

The terms of approval shall identify the scope of work, the products or the categories of parts and appliances, or both, the CMUs or the CMU components, or both, for which the holder is entitled to exercise the privileges under point 21.A.163.

Those terms shall be issued as part of a production organisation approval.

IR · 21.A.151 — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GM Guidance material

## GM 21.A.151 Terms of approval – Scope and categories

Terms of approval document(s) will be issued by the competent authority under 21.A.135 to identify the scope of work, the products, and/or categories for which the holder is entitled to exercise the privileges defined in 21.A.163.

The codes shown against each scope of work item are intended for use by the competent authority for purposes such as managing, administering and filing details of approvals. It may also assist in the production and publication of a list of approval holders.

The scope of work, the Products, Parts, or Appliances for which the POA holder is entitled to exercise the privileges defined in 21.A.163 will be described by the competent authority as follows:

FOR PRODUCTS:

1\. General area, similar to the titles of the corresponding certification codes.

2\. Type of Product, in accordance with the type-certificate.

FOR PARTS AND APPLIANCES:

1\. General area, showing the expertise, e.g., mechanical, metallic structure.

2\. Generic type, e.g., wing, landing gear, tyres.

| SCOPE OF WORK                                                                                                                                                                                                                | PRODUCTS/CATEGORIES                                                                                                                                                                                                                                                                                                                                                                                       |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| A1 Large Aeroplanes A2 Small Aeroplanes A3 Large Helicopters A4 Small Helicopters A5 Gyroplanes A6 Sailplanes A7 Motor Gliders A8 Manned Balloons A9 Airships A10 Light Sport Aeroplanes A11 Very Light Aeroplanes A12 Other | State types ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘                                                                                                                                                                                                                                                                                                                                                                         |
| B1 Turbine Engines B2 Piston Engines B3 APU’s B4 Propellers                                                                                                                                                                  | ‘ ‘ ‘                                                                                                                                                                                                                                                                                                                                                                                                     |
| C1 Appliances: C2 Parts:                                                                                                                                                                                                     | State appliance generic types (e.g., Tyres, Altimeter, etc.) Examples include: Avionic, Com/Nav/Pulse Computer System, Aircraft/Engine/Avionic Instruments, Mechanical/Electrical/Gyroscopic/Electronic Mechanical/Hydraulic/Pneumatic State part generic types (e.g., Wing, Landing Gear, etc.) Examples include: Structural, Metallic/non-metallic Mechanical/Hydraulic/Pneumatic Electrical Electronic |
| D1 Maintenance D2 Issue of permit to fly                                                                                                                                                                                     | State aircraft types State aircraft types                                                                                                                                                                                                                                                                                                                                                                 |

GM · GM 21.A.151 — Regulation (EU) No 748/2012 · ED Decision 2012/020/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION A — TECHNICAL REQUIREMENTS](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements)

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.