---
title: "MODULE 3. ELECTRICAL FUNDAMENTALS — Part-66 · Avioverse"
description: "MODULE 3. ELECTRICAL FUNDAMENTALS LEVEL A B1 B2 B2L B3 3.1 Electron theory 1 1 1 3.2 Static electricity and conduction 1 2 1 3.3 Electrical terminology 1…"
url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66/module-3-electrical-fundamentals"
---

# MODULE 3. ELECTRICAL FUNDAMENTALS

Annex III (Part-66) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025

IR Implementing rule

## MODULE 3. ELECTRICAL FUNDAMENTALS

| MODULE 3. ELECTRICAL FUNDAMENTALS                             |                          | LEVEL |           |    |
| ------------------------------------------------------------- | ------------------------ | ----- | --------- | -- |
|                                                               |                          | A     | B1 B2 B2L | B3 |
| 3.1 Electron theory                                           |                          | 1     | 1         | 1  |
| 3.2 Static electricity and conduction                         |                          | 1     | 2         | 1  |
| 3.3 Electrical terminology                                    |                          | 1     | 2         | 1  |
| 3.4 Generation of electricity                                 |                          | 1     | 1         | 1  |
| 3.5 Sources of DC electricity                                 |                          | 1     | 2         | 2  |
| 3.6 DC circuits                                               |                          | 1     | 2         | 1  |
| 3.7 Resistance/resistor                                       |                          |       |           |    |
|                                                               | (a) Resistance;          | —     | 2         | 1  |
|                                                               | (b) Resistors.           | —     | 1         | —  |
| 3.8 Power                                                     |                          | —     | 2         | 1  |
| 3.9 Capacitance/capacitor                                     |                          | —     | 2         | 1  |
| 3.10 Magnetism                                                |                          |       |           |    |
|                                                               | (a) Theory of magnetism; | —     | 2         | 1  |
|                                                               | (b) Magnetomotive force. | —     | 2         | 1  |
| 3.11 Inductance/inductor                                      |                          | —     | 2         | 1  |
| 3.12 DC motor/generator theory                                |                          | —     | 2         | 1  |
| 3.13 AC theory                                                |                          | 1     | 2         | 1  |
| 3.14 Resistive (R), capacitive (C) and inductive (L) circuits |                          | —     | 2         | 1  |
| 3.15 Transformers                                             |                          | —     | 2         | 1  |
| 3.16 Filters                                                  |                          | —     | 1         | —  |
| 3.17 AC generators                                            |                          | —     | 2         | 1  |
| 3.18 AC motors                                                |                          | —     | 2         | 1  |

IR — Regulation (EU) No 1321/2014 · Regulation (EU) 2023/989 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

[All rules in APPENDICES TO ANNEX III (Part-66)](https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66)

Consolidated from the EASA Easy Access Rules (revision 2 Sep 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.