---
title: "MODULE 15. GAS TURBINE ENGINE — Part-66 · Avioverse"
description: "MODULE 15. GAS TURBINE ENGINE LEVEL A1 A3 B1.1 B1.3 15.1 Fundamentals 1 2 15.2 Engine performance — 2 15.3 Inlet 2 2 15.4 Compressors 1 2 15.5 Combustion…"
url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66/module-15-gas-turbine-engine"
---

# MODULE 15. GAS TURBINE ENGINE

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

IR Implementing rule

## MODULE 15. GAS TURBINE ENGINE

| MODULE 15. GAS TURBINE ENGINE                | LEVEL |           |
| -------------------------------------------- | ----- | --------- |
|                                              | A1 A3 | B1.1 B1.3 |
| 15.1 Fundamentals                            | 1     | 2         |
| 15.2 Engine performance                      | —     | 2         |
| 15.3 Inlet                                   | 2     | 2         |
| 15.4 Compressors                             | 1     | 2         |
| 15.5 Combustion section                      | 1     | 2         |
| 15.6 Turbine section                         | 2     | 2         |
| 15.7 Exhaust                                 | 1     | 2         |
| 15.8 Bearings and seals                      | —     | 2         |
| 15.9 Lubricants and fuels                    | 1     | 2         |
| 15.10 Lubrication systems                    | 1     | 2         |
| 15.11 Fuel systems                           | 1     | 2         |
| 15.12 Air systems                            | 1     | 2         |
| 15.13 Starting and ignition systems          | 1     | 2         |
| 15.14 Engine indication systems              | 1     | 2         |
| 15.15 Alternate turbine constructions        | —     | 1         |
| 15.16 Turboprop engines                      | 1     | 2         |
| 15.17 Turboshaft engines                     | 1     | 2         |
| 15.18 Auxiliary power units (APUs)           | 1     | 2         |
| 15.19 Power plant installation               | 1     | 2         |
| 15.20 Fire protection systems                | 1     | 2         |
| 15.21 Engine monitoring and ground operation | 1     | 3         |
| 15.22 Engine storage and preservation        | —     | 2         |

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.