---
title: "NCO.IDE.H.135 Flight crew interphone system — Part-NCO · Avioverse"
description: "Rotorcraft operated by more than one flight crew member shall be equipped with a flight crew interphone system, including headsets and microphones for…"
url: "https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-d/nco-ide-h-135"
---

# NCO.IDE.H.135 Flight crew interphone system

ANNEX VII (Part-NCO) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-air-operations) · [EUR-Lex 2012/965 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R0965)

IR Implementing rule

## NCO.IDE.H.135 Flight crew interphone system

[Rotorcraft](https://avioverse.aero/glossary/easa/rotorcraft) operated by more than one [flight crew member](https://avioverse.aero/glossary/easa/flight-crew-member) shall be equipped with a flight crew interphone system, including headsets and microphones for use by all flight crew members.

IR · NCO.IDE.H.135 — Regulation (EU) No 965/2012 · Regulation (EU) 2025/133 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

AMC Acceptable means of compliance

## AMC1 NCO.IDE.H.135 Flight crew interphone system

GENERAL

(a) The flight crew interphone system should not be of a handheld type.

(b) A headset consists of a communication device which includes two earphones to receive and a microphone to transmit audio signals to the [rotorcraft](https://avioverse.aero/glossary/easa/rotorcraft)’s communication system. To comply with the minimum performance requirements, the earphones and microphone should match the communication system’s characteristics and the flight crew compartment environment. The headset should be adequately adjustable in order to fit the pilot’s head. Headset boom microphones should be of the noise-cancelling type.

(c) If the intention is to utilise noise-cancelling earphones, the pilot-in-command should ensure that the earphones do not attenuate any aural warnings or sounds necessary for alerting the flight crew on matters related to the safe operation of the rotorcraft.

AMC · AMC1 NCO.IDE.H.135 — Regulation (EU) No 965/2012 · ED Decision 2025/023/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

GM Guidance material

## GM1 NCO.IDE.H.135 Flight crew interphone system

HEADSET

The term ‘headset’ includes any aviation helmet incorporating headphones and microphone worn by a [flight crew member](https://avioverse.aero/glossary/easa/flight-crew-member).

GM · GM1 NCO.IDE.H.135 — Regulation (EU) No 965/2012 · ED Decision 2014/016/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in SUBPART D: INSTRUMENTS, DATA AND EQUIPMENT](https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-d)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.