---
title: "CS ADR-DSN.T.915 Siting of equipment and installations on operational areas — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Equipment and installations should be sited as far away from the runway and taxiway centre lines as practicable."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-915"
---

# CS ADR-DSN.T.915 Siting of equipment and installations on operational areas

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

IR Implementing rule

## CS ADR-DSN.T.915 Siting of equipment and installations on operational areas

(a) Equipment and installations should be sited as far away from the [runway](https://avioverse.aero/glossary/easa/runway) and [taxiway](https://avioverse.aero/glossary/easa/taxiway) centre lines as practicable.

(b) Unless its function requires it to be there for air navigation or for [aircraft](https://avioverse.aero/glossary/easa/aircraft) safety purposes, no equipment or installation endangering an aircraft should be located:

(1) on a [runway strip](https://avioverse.aero/glossary/easa/runway-strip), a runway end [safety area](https://avioverse.aero/glossary/easa/safety-area), a [taxiway strip](https://avioverse.aero/glossary/easa/taxiway-strip), or within the following distances:

| Code Letter | Distance between taxiway, other than [aircraft stand taxilane](https://avioverse.aero/glossary/easa/aircraft-stand-taxilane), centre line to object (metres) |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| A           | 15.5                                                                                                                                                         |
| B           | 20                                                                                                                                                           |
| C           | 26                                                                                                                                                           |
| D           | 37                                                                                                                                                           |
| E           | 43.5                                                                                                                                                         |
| F           | 51                                                                                                                                                           |

if it would endanger an aircraft, or

(2) on a [clearway](https://avioverse.aero/glossary/easa/clearway) if it would endanger an aircraft in the air.

(c) Any equipment or installation required for air navigation or for aircraft safety purposes which should be located:

(1) on that portion of a runway strip within:

(i) 75 m of the runway centre line where the code number is 3 or 4; or

(ii) 45 m of the runway centre line where the code number is 1 or 2; or

(2) on a runway end safety area, a taxiway strip, or within the distances specified in Table D-1; or

(3) on a clearway and which would endanger an aircraft in the air;

should be frangible and mounted as low as possible.

(d) Unless its function requires it to be there for air navigation or for aircraft safety purposes, or if after a safety assessment, it is determined that it would not adversely affect the safety or significantly affect the regularity of operations of aeroplanes, no equipment or installation should be located within 240 m from the end of the strip and within:

(1) 60 m of the extended centre line where the code number is 3 or 4; or

(2) 45 m of the extended centre line where the code number is 1 or 2;

of a precision approach runway Category I, II or III.

(e) Any equipment or installation required for air navigation or for aircraft safety purposes, which should be located on or near a strip of a precision approach runway Category I, II, or III and which:

(1) is situated within 240 m from the end of the strip and within:

(i) 60 m of the extended runway centre line where the code number is 3 or 4; or

(ii) 45 m of the extended runway centre line where the code number is 1 or 2; or

(2) penetrates the inner approach surface, the inner transitional surface, or the [balked landing](https://avioverse.aero/glossary/easa/balked-landing) surface;

should be frangible and mounted as low as possible.

(f) Any equipment or installation required for air navigation or for aircraft safety purposes that is an [obstacle](https://avioverse.aero/glossary/easa/obstacle) of operational significance in accordance with CS ADR-DSN.J.470(d), CS ADR-DSN.J.475(e), CS ADR-DSN.J.480(g), or CS ADR-DSN.J.485(e) should be frangible and mounted as low as possible.

(g) Any equipment or installation required for air navigation or for aircraft safety purposes which should be located on the non-graded portion of a runway strip should be regarded as an obstacle and should be frangible and mounted as low as possible.

\[Issue: ADR-DSN/2]

\[Issue: ADR-DSN/3]

\[Issue: ADR-DSN/6]

IR · CS ADR-DSN.T.915 — Regulation (EU) No 139/2014 · ED Decision 2022/006/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER T — AERODROME OPERATIONAL SERVICES, EQUIPMENT AND INSTALLATION](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment)

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.