---
title: "ETSO-2C500a — CS-ETSO · Avioverse"
description: "Multi-mode Receiver (ILS/MLS/GPS) 1 Applicability This ETSO gives the requirements which multi-mode receivers (ILS/MLS/GPS) that are manufactured on or…"
url: "https://avioverse.aero/regulations/easa/cs-etso/subpart-b/etso-2c500a"
---

# ETSO-2C500a

European Technical Standard Orders (CS-ETSO) · CS-ETSO · EAR revision 1 Oct 2026

IR Implementing rule

## ETSO-2C500a

Multi-mode Receiver (ILS/MLS/GPS)

1 Applicability

This ETSO gives the requirements which multi-mode receivers (ILS/MLS/GPS) that are manufactured on or after the date of this ETSO must meet in order to be identified with applicable ETSO marking.

2 Procedures

2.1 General

Applicable procedures are detailed in CS-ETSO Subpart A.

2.2 Specific

None.

3 Technical Conditions

3.1 Basic

3.1.1 Minimum Performance Standard

Standards set forth in EUROCAE document ED-88 dated August 1997.

3.1.2 Environmental Standard

See CS-ETSO Subpart A paragraph 2.1

3.1.3 Computer Software

See CS-ETSO Subpart A paragraph 2.2

3.2 Specific

None

4 Marking

4.1 General

Marking is detailed in CS-ETSO Subpart A paragraph 1.2

4.2 Specific

None.

5 Availability of Referenced Document

See CS-ETSO Subpart A paragraph 3.

IR · ETSO-2C500a — CS-ETSO · ED Decision 2003/10/RM · CS-ETSO Easy Access Rules · EAR revision 1 Oct 2026

[All rules in SUBPART B – LIST OF ETSOs](https://avioverse.aero/regulations/easa/cs-etso/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 1 Oct 2026, 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.