---
title: "MODULE 13. AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMS — Part-66 · Avioverse"
description: "C/N: Communication & Navigation; Ins.: Instruments; A/F: Autoflight;"
url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66/module-13-aircraft-aerodynamics-structures-and-systems"
---

# MODULE 13. AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMS

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

IR Implementing rule

## MODULE 13. AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMS

C/N: Communication & Navigation; Ins.: Instruments; A/F: Autoflight; Sur.: Surveillance; A/S: Airframe & Systems

| MODULE 13. [AIRCRAFT](https://avioverse.aero/glossary/easa/aircraft) AERODYNAMICS, STRUCTURES AND SYSTEMS |                                                                                                   |                                 | LEVEL |           |         |          |         |          |         |
| --------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | ------------------------------- | ----- | --------- | ------- | -------- | ------- | -------- | ------- |
|                                                                                                           |                                                                                                   |                                 | B2    | B2L Basic | B2L C/N | B2L Ins. | B2L A/F | B2L Sur. | B2L A/S |
| 13.1 Theory of Flight                                                                                     |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) [Aeroplane](https://avioverse.aero/glossary/easa/aeroplane) Aerodynamics and Flight Controls; |                                 | 1     | 1         | —       | —        | —       | —        | —       |
|                                                                                                           | (b) Rotary Wing Aerodynamics.                                                                     |                                 | 1     | 1         | —       | —        | —       | —        | —       |
| 13.2 Structures – General Concepts (ATA 51)                                                               |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) General concept;                                                                              |                                 | 2     | 2         | —       | —        | —       | —        | —       |
|                                                                                                           | (b) Fundamentals of structural systems;                                                           |                                 | 1     | 1         | —       | —        | —       | —        | —       |
| 13.3 Autoflight (ATA 22)                                                                                  |                                                                                                   |                                 | 3     |           |         |          |         |          |         |
|                                                                                                           | (a) Fundamentals of automatic flight control;                                                     |                                 | —     |           | —       | —        | 3       | —        | —       |
|                                                                                                           | (b) Autothrottle systems and automatic landing systems.                                           |                                 | 3     | —         | —       | —        | 3       | —        | —       |
| 13.4 Communication/Navigation (ATA 23/34)                                                                 |                                                                                                   |                                 | 3     |           |         |          |         |          |         |
|                                                                                                           | (a) Fundamentals of communication and navigation systems;                                         |                                 | —     |           | 3       | —        | —       | —        | —       |
|                                                                                                           | (b) Fundamentals of aircraft surveillance systems.                                                |                                 | 3     | —         | —       | —        | —       | 3        | —       |
| 13.5 Electrical power (ATA 24)                                                                            |                                                                                                   |                                 | 3     | 3         | —       | —        | —       | —        | —       |
| 13.6 Equipment and furnishings (ATA 25)                                                                   |                                                                                                   |                                 | 3     | —         | —       | —        | —       | —        | —       |
| 13.7 Flight Controls                                                                                      |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) Primary and secondary flight controls (ATA 27);                                               |                                 | 2     | —         | —       | —        | 2       | —        | —       |
|                                                                                                           | (b) Actuation and protection;                                                                     |                                 | 2     | —         | —       | —        | 2       | —        | —       |
|                                                                                                           | (c) System operation;                                                                             |                                 | 3     | —         | —       | —        | 3       | —        | —       |
|                                                                                                           | (d) [Rotorcraft](https://avioverse.aero/glossary/easa/rotorcraft) flight controls (ATA 67).       |                                 | 2     | —         | —       | —        | 2       | —        | —       |
| 13.8 Instruments (ATA 31)                                                                                 |                                                                                                   |                                 | 3     | —         | —       | 3        | —       | —        | —       |
| 13.9 Lights (ATA 33)                                                                                      |                                                                                                   |                                 | 3     | 3         | —       | —        | —       | —        | —       |
| 13.10 On-board [maintenance](https://avioverse.aero/glossary/easa/maintenance) systems (ATA 45)           |                                                                                                   |                                 | 3     | —         | —       | —        | —       | —        | —       |
| 13.11 Air conditioning and cabin pressurisation (ATA 21)                                                  |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           |                                                                                                   | (a) Pressurisation;             | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           |                                                                                                   | (b) Air supply;                 | 1     | —         | —       | —        |         | —        | 1       |
|                                                                                                           |                                                                                                   | (c) Air conditioning;           | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           |                                                                                                   | (d) Safety and warning devices. | 3     | —         | —       | —        | —       | —        | 3       |
| 13.12 Fire protection (ATA 26)                                                                            |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) Fire and smoke detection system and fire-extinguishing systems;                               |                                 | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           | (b) Portable fire extinguisher.                                                                   |                                 | 1     | —         | —       | —        | —       | —        | 1       |
| 13.13 Fuel systems (ATA 28, ATA 47)                                                                       |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) System layout;                                                                                |                                 | 1     | —         | —       | —        | —       | —        | 1       |
|                                                                                                           | (b) Fuel handling;                                                                                |                                 | 2     | —         | —       | —        | —       | —        | 2       |
|                                                                                                           | (c) Indications and warnings;                                                                     |                                 | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           | (d) Special systems;                                                                              |                                 | 1     | —         | —       | —        | —       | —        | 1       |
|                                                                                                           | (e) Balancing                                                                                     |                                 | 3     | —         | —       | —        | —       | —        | 3       |
| 13.14 Hydraulic power (ATA 29)                                                                            |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) System layout;                                                                                |                                 | 1     | —         | —       | —        | —       | —        | 1       |
|                                                                                                           | (b) System operation (1);                                                                         |                                 | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           | (c) System operation (2);                                                                         |                                 | 3     | —         | —       | —        | —       | —        | 3       |
| 13.15 Ice and rain protection (ATA 30)                                                                    |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) Principles;                                                                                   |                                 | 2     | —         | —       | —        | —       | —        | 2       |
|                                                                                                           | (b) De-icing;                                                                                     |                                 | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           | (c) Anti-icing;                                                                                   |                                 | 2     | —         | —       | —        | —       | —        | 2       |
|                                                                                                           | (d) Wiper systems;                                                                                |                                 | 1     | —         | —       | —        | —       | —        | 1       |
|                                                                                                           | (e) Rain repellent                                                                                |                                 | 1     | —         | —       | —        | —       | —        | 1       |
| 13.16 Landing gear (ATA 32)                                                                               |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) Description;                                                                                  |                                 | 1     | —         | —       | —        | —       | —        | 1       |
|                                                                                                           | (b) System;                                                                                       |                                 | 3     | —         | —       | —        | —       | —        | 3       |
|                                                                                                           | (c) Air-ground sensing.                                                                           |                                 | 3     | —         | —       | —        | —       | —        | 3       |
| 13.17 Oxygen (ATA 35)                                                                                     |                                                                                                   |                                 | 3     | —         | —       | —        | —       | —        | 3       |
| 13.18 Pneumatic/vacuum (ATA 36)                                                                           |                                                                                                   |                                 | 2     |           | —       | —        | —       | —        | 2       |
| 13.19 Water/waste (ATA 38)                                                                                |                                                                                                   |                                 | 2     | —         | —       | —        | —       | —        | 2       |
| 13.20 Integrated modular avionics (ATA 42)                                                                |                                                                                                   |                                 |       |           |         |          |         |          |         |
|                                                                                                           | (a) Overall system description and theory;                                                        |                                 | 3     | -         | —       | —        | —       | —        | —       |
|                                                                                                           | (b) Typical system layouts.                                                                       |                                 | 3     | -         | —       | —        | —       | —        | —       |
| 13.21 Cabin systems (ATA 44)                                                                              |                                                                                                   |                                 | 3     | —         | —       | —        | —       | —        | —       |
| 13.22 Information systems (ATA 46)                                                                        |                                                                                                   |                                 | 3     | —         | —       | —        | —       | —        | —       |

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.