---
title: "ETSO-C85b — CS-ETSO · Avioverse"
description: "Survivor Locator Lights 1 Applicability This ETSO gives the requirements which survivor locator lights that are designed and manufactured on or after the…"
url: "https://avioverse.aero/regulations/easa/cs-etso/subpart-b/etso-c85b"
---

# ETSO-C85b

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

IR Implementing rule

## ETSO-C85b

Survivor Locator Lights

1 Applicability

This ETSO gives the requirements which survivor locator lights that are designed and manufactured on or after the date of this ETSO must meet in order to be identified with the 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 Society of Automotive Engineers, Inc. (SAE), Aerospace Standard (AS) 4492, „Survivor Locator Lights,“ dated January 1995, reaffirmed November 18, 2004, as amended by Appendix 1 of this ETSO.

3.1.2 Environmental Standard

See CS-ETSO Subpart A paragraph 2.1

3.1.3 Computer Software

None

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.

\[Amdt ETSO/12]

IR · ETSO-C85b — CS-ETSO · ED Decision 2016/029/R · CS-ETSO Easy Access Rules · EAR revision 1 Oct 2026

Appendix Appendix

## Appendix 1 to ETSO-C85b MPS for Survivor Locator Lights

The applicable standard is SAE AS4492, Survivor Locator Lights, dated January 1995, reaffirmed November 18, 2004 which shall be modified by adding the following:

(a) Locator light and battery pack must be constructed of materials that comply with CS-25, Appendix F, Part I (a)(1)(v) or Appendix F, Part I (a)(1)(ii) instead.

(b) Insulation on electrical wire connected to the locator light and battery pack must be self-extinguishing in compliance with CS 25.869(a)(4) respectively CS-25, Appendix F part I (a)(3).

\[Amdt ETSO/12]

APPENDIX · Appendix 1 to ETSO-C85b — CS-ETSO · ED Decision 2016/029/R · 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.