---
title: "CAT.IDE.H.175 Crew member interphone system — Part-CAT · Avioverse"
description: "Helicopters shall be equipped with a crew member interphone system when carrying a crew member other than a flight crew member."
url: "https://avioverse.aero/regulations/easa/air-ops/part-cat/subpart-d/cat-ide-h-175"
---

# CAT.IDE.H.175 Crew member interphone system

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

IR Implementing rule

## CAT.IDE.H.175 Crew member interphone system

Helicopters shall be equipped with a [crew member](https://avioverse.aero/glossary/easa/crew-member) interphone system when carrying a crew member other than a [flight crew member](https://avioverse.aero/glossary/easa/flight-crew-member).

IR · CAT.IDE.H.175 — Regulation (EU) No 965/2012 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

AMC Acceptable means of compliance

## AMC1 CAT.IDE.H.175 Crew member interphone system

SPECIFICATIONS

The [crew member](https://avioverse.aero/glossary/easa/crew-member) interphone system should:

(a) operate independently of the public address system except for handsets, headsets, microphones, selector switches and signalling devices;

(b) in the case of helicopters where at least one [cabin crew member](https://avioverse.aero/glossary/easa/cabin-crew-member) is required, be readily accessible for use at required cabin crew stations close to each separate or pair of floor level emergency exits;

(c) in the case of helicopters where at least one cabin crew member is required, have an alerting system incorporating aural or visual signals for use by flight and cabin crew;

(d) have a means for the recipient of a call to determine whether it is a normal call or an emergency call that uses one or a combination of the following:

(1) lights of different colours;

(2) codes defined by the operator (e.g. different number of rings for normal and emergency calls); or

(3) any other indicating signal specified in the operations manual;

(e) provide a means of two-way communication between the flight crew compartment and each crew member station; and

(f) be readily accessible for use from each required flight crew station in the flight crew compartment.

AMC · AMC1 CAT.IDE.H.175 — Regulation (EU) No 965/2012 · ED Decision 2014/015/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

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

Consolidated from the EASA Easy Access Rules (revision 27 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.