---
title: "GM1 ADR-DSN.R.870 Unserviceable areas — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Unserviceable area lights are frangible. Their height is sufficiently low to preserve clearance for propellers and for engine pods of jet aircraft."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-r-visual-aids-for-denoting-restricted-use/gm1-adr-dsn-r-870"
---

# GM1 ADR-DSN.R.870 Unserviceable areas

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

GM Guidance material

## GM1 ADR-DSN.R.870 Unserviceable areas

Unserviceable area lights are frangible. Their height is sufficiently low to preserve clearance for propellers and for engine pods of jet [aircraft](https://avioverse.aero/glossary/easa/aircraft).

\[Issue: ADR-DSN/7]

GM · GM1 ADR-DSN.R.870 — Regulation (EU) No 139/2014 · ED Decision 2025/004/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER R — VISUAL AIDS FOR DENOTING RESTRICTED USE AREAS](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-r-visual-aids-for-denoting-restricted-use)

Consolidated from the EASA Easy Access Rules (revision 13 Mar 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.