Skip to content

A gradual release of Avioverse begins in October 2026. Request early access →

CHAPTER E — OBSTACLE LIMITATION SURFACES AND REQUIREMENTS

Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1 · Aerodromes · Regulation (EU) No 139/2014 · CS HPT-DSN.E.400 – CS HPT-DSN.E.430

On this page
  1. CS HPT-DSN.E.400 Applicability

    The purpose of the obstacle limitation surfaces is to define the airspace around heliports so as to permit intended helicopter operations to be conducted…

  2. GM1 HPT-DSN.E.400 Applicability

    Intentionally left blank

  3. CS HPT-DSN.E.410 Approach surface

    Applicability: The purpose of an approach surface is to protect a helicopter during the final approach to the FATO by defining an area that should be…

  4. GM1 HPT-DSN.E.410 Approach surface

    Consultations with helicopter operators could assist the aerodrome operator in determining the appropriate slope category to apply according to the…

  5. CS HPT-DSN.E.420 Take-off climb surface

    Applicability: The purpose of the take-off climb surface is to protect a helicopter on take-off and during climb-out.

  6. GM1 HPT-DSN.E.420 Take-off climb surface

    Helicopter take-off performance is reduced in a curve, so a straight portion along the take-off climb surface prior to the start of the curve allows for…

  7. CS HPT-DSN.E.430 Obstacle limitation requirements

    General: The following obstacle limitation surfaces should be established for a FATO:

  8. GM1 HPT-DSN.E.430 Obstacle limitation requirements

    Intentionally left blank

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

Ask Metis about CS HPT-DSN.E.400 – CS HPT-DSN.E.430 →

Metis opens with Avioverse in October 2026 · request early access.

ShareLinkedInX