---
title: "STCs in GROUP 1 AEROPLANES — Part-66 · Avioverse"
description: "GROUP 1 AEROPLANES (STC) STC holder Model Com. Part-66 type rating endorsement Note AEROSERVIS s.r.o."
url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-amc-to-annex-iii-part-66/stcs-in-group-1-aeroplanes"
---

# STCs in GROUP 1 AEROPLANES

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

IR Implementing rule

## STCs in GROUP 1 AEROPLANES

| GROUP 1 AEROPLANES (STC)                 |                   |           |                                  |                          |
| ---------------------------------------- | ----------------- | --------- | -------------------------------- | ------------------------ |
| STC holder                               | Model             | Com. des. | Part-66 type rating endorsement  | Note                     |
| AEROSERVIS s.r.o.                        | L 410 UVP-E       |           | Let-410 (PWC PT6)                | STC not yet released.    |
| AEROSERVIS s.r.o.                        | L 410 UVP-E9      |           | Let-410 (PWC PT6)                | STC not yet released.    |
| AEROSERVIS s.r.o.                        | L 410 UVP-E20     |           | Let-410 (PWC PT6)                | STC not yet released.    |
| GOMOLZIG FLUGZEUG-UND MASCHINENBAU (STC) | Dornier DO 28 D-2 |           | Dornier Do 28 (Walter M601)      | STC No 10015031          |
| JET AVIATION AG (STC)                    | Fan Jet Falcon E  |           | Falcon 20E (Honeywell TFE731)    |                          |
| NEXTANT AEROSPACE L.L.C. (STC)           | Beech 400A        |           | Beech 400A (Williams FJ44)       | STC No 10042353          |
| Sierra Industries Ltd.                   | 501               | Citation  | Cessna 501 (Williams FJ44)       | STC No EASA.IM.A.S.01937 |
| THE MONROE COMPANY, LLC (STC)            | Cessna 550        |           | Cessna 550/S550 (Williams FJ 44) | STC No 10053014          |
| THE MONROE COMPANY, LLC (STC)            | Cessna S550       |           | Cessna 550/S550 (Williams FJ 44) | STC No 10053014          |

IR — Regulation (EU) No 1321/2014 · ED Decision 2019/024/R · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

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