---
title: "CS HPT-DSN.C.210 Helicopter air taxiways and helicopter air taxi-routes — Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1, Aerodromes · Avioverse"
description: "General: A helicopter air taxiway should be designed so as to permit the movement of a helicopter above the surface at a height normally associated with…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-c-helicopter-taxiways-and-taxi-routes/cs-hpt-dsn-c-210"
---

# CS HPT-DSN.C.210 Helicopter air taxiways and helicopter air taxi-routes

Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

IR Implementing rule

## CS HPT-DSN.C.210 Helicopter air taxiways and helicopter air taxi-routes

(a) General: A [helicopter air taxiway](https://avioverse.aero/glossary/easa/helicopter-air-taxiway) should be designed so as to permit the [movement](https://avioverse.aero/glossary/easa/movement) of a helicopter above the surface at a height normally associated with ground effect and at ground speed less than 37 km/h (20 kt).

(b) Characteristics:

(1) The width of a helicopter air taxiway should be at least two times the largest width of the undercarriage (UCW) of the helicopters that the helicopter air taxiway is intended to serve (see Figure C-2).

(2) The surface of a helicopter air taxiway should be static load-bearing.

(3) The slopes of the surface of a helicopter air taxiway should not exceed the slope landing limitations of the helicopters the helicopter air taxiway is intended to serve.

(4) The transverse slope of a helicopter air taxiway should not exceed 10 per cent.

(5) The longitudinal slope of a helicopter air taxiway should not exceed 7 per cent.

(6) A helicopter air taxiway should be centred on a helicopter air taxi-route.

(7) A helicopter air taxi-route should extend symmetrically on each side of the centre line for a distance at least equal to the largest overall width of the helicopters it is intended to serve.

(8) No fixed object should be permitted above the surface on an air taxi-route, except for frangible objects, which, because of their function, must be located there.

(9) No mobile object should be permitted on an air taxi-route during helicopter movements.

(10) Objects above ground level whose function requires them to be located on a helicopter air taxi route should not:

(i) be located at a distance of less than 1 m from the edge of the helicopter air taxiway, or at a distance of less than 0.5 times the largest overall width of the helicopter for which the helicopter air taxi-route is designed from the centre line of the helicopter air taxiway, whichever is greater; and

(ii) penetrate a plane originating at a height of 25 cm above the plane of the helicopter air taxiway, and sloping upwards and outwards at a gradient of 5 per cent, at a distance of 1 m from the edge of the helicopter air taxiway, or at a distance of 0.5 times the largest overall width of the helicopter for which the helicopter air taxi-route is designed from the centreline of the helicopter air taxiway, whichever is lower.

(11) The surface of a helicopter air taxi-route should be resistant to the effect of rotor downwash.

(12) The surface of a helicopter air taxi-route should provide ground effect.

(13) For simultaneous operations, the helicopter air taxi-routes should not overlap.

\[Figure or form omitted from this preview — available in the Avioverse workspace library.]

Figure C-2. Helicopter air taxi-route/[taxiway](https://avioverse.aero/glossary/easa/taxiway)

IR · CS HPT-DSN.C.210 — Regulation (EU) No 139/2014 · ED Decision 2019/012/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER C — HELICOPTER TAXIWAYS AND TAXI-ROUTES](https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-c-helicopter-taxiways-and-taxi-routes)

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.