Aerospace series - Rotorcraft Emergency Breathing Systems (EBS) - Requirements, testing and marking

This document specifies requirements for Emergency Breathing Systems (EBS) for use by helicopter crew and passengers in the event of a ditching or water impact, to ensure minimum levels of performance. It applies to EBS capable of being successfully and reliably deployed in air and underwater, for use by adults only.
This document is applicable to compressed air and hybrid rebreather designs of EBS. It does not apply to EBS that cannot be successfully and reliably deployed underwater.

Luft-und Raumfahrt - Drehflügler Notfallbeatmungssystem (EBS) - Anforderungen, Prüfung und Kennzeichnung

Série aérospatiale - Systèmes de ventilation d'urgence (EBS) de giravion - Exigences, essais et marquage

Le présent document spécifie les exigences relatives aux systèmes de ventilation d'urgence (EBS) destinés à être utilisés par l'équipage et par les passagers des hélicoptères en cas d'amerrissage forcé ou d'impact avec un plan d'eau, afin de garantir des niveaux minimaux de performance. Il s’applique aux EBS pouvant être correctement déployés à l’air libre et sous l'eau, destinés à être utilisés uniquement par des adultes.
Le présent document s'applique aux modèles d'EBS à air comprimé ainsi qu’à masque à recirculation hybride. Il ne s’applique pas aux EBS ne pouvant pas être correctement déployés sous l'eau.

Aeronavtika - Rotoplani - Sistem prezračevanja v sili (EBS) - Zahteve, preskušanje in označevanje

Ta dokument določa zahteve za sisteme prezračevanja v sili (EBS), ki jih uporabljajo helikopterske posadke in potniki v primeru pristanka v sili ali vdora vode, da se zagotovi minimalna raven zahtevanih lastnosti. Velja za sisteme EBS, ki jih je mogoče uspešno in zanesljivo uvede v zraku in pod vodo ter so namenjeni samo odraslim osebam.
Ta dokument se uporablja za modele EBS dihalnih aparatov na stisnjen zrak in hibridne dihalne aparate z zaprtim krogom. Ne velja za sisteme EBS, ki jih ni mogoče uspešno in zanesljivo uvesti pod vodo.

General Information

Status
Published
Publication Date
07-Feb-2023
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
08-Feb-2023
Completion Date
08-Feb-2023

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SLOVENSKI STANDARD
01-april-2023
Aeronavtika - Rotoplani - Sistem prezračevanja v sili (EBS) - Zahteve, preskušanje
in označevanje
Aerospace series - Rotorcraft - Emergency Breathing Systems (EBS) - Requirements,
testing and marking
Luft-und Raumfahrt - Drehflügler - Notfallbeatmungssystem (EBS) - Anforderungen,
Prüfung und Kennzeichnung
Série aérospatiale - Giravion - Système de ventilation d'urgence (EBS) - Exigences,
essais et marquage
Ta slovenski standard je istoveten z: EN 4856:2023
ICS:
49.095 Oprema za potnike in Passenger and cabin
oprema kabin equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4856
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 49.095 Supersedes EN 4856:2018
English Version
Aerospace series - Rotorcraft Emergency Breathing
Systems (EBS) - Requirements, testing and marking
Série aérospatiale - Systèmes de ventilation d'urgence Luft-und Raumfahrt - Drehflügler
(EBS) de giravion - Exigences, essais et marquage Notfallbeatmungssystem (EBS) - Anforderungen,
Prüfung und Kennzeichnung
This European Standard was approved by CEN on 18 December 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4856:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Design types . 11
4.1 Compressed air EBS . 11
4.2 Hybrid rebreather EBS . 11
5 Performance requirements . 11
5.1 General. 11
5.2 Design . 12
5.3 Materials . 13
5.4 Breathing performance . 13
5.4.1 General. 13
5.4.2 Work of breathing . 14
5.4.3 Respiratory pressures. 14
5.4.4 Hydrostatic imbalance . 14
5.4.5 Extreme cold water temperatures . 14
5.5 Safety devices . 14
5.6 Deployment . 15
5.7 Ease of use and manoeuvrability in water . 15
5.8 Buoyancy . 15
5.9 Cold water performance . 16
5.10 Compatibility . 16
5.10.1 General. 16
5.10.2 Performance of equipment combination(s) . 16
6 Testing . 19
6.1 Visual inspection . 19
6.2 Nominal values and tolerances . 19
6.3 Magnetic properties testing . 19
6.4 Temperature cycling. 19
6.5 Breathing performance . 20
6.6 Breathable volume of counterlung . 22
6.7 Buoyancy. 23
6.8 Ergonomic performance . 23
6.8.1 General . 23
6.8.2 Test subjects . 24
6.8.3 Deployment. 26
6.8.4 Ease of use, manoeuvrability and helicopter escape . 26
6.9 Cold water performance . 28
6.10 Compatibility and performance of equipment combination(s) . 28
6.10.1 General . 28
6.10.2 Test subjects . 28
6.10.3 Clothing . 28
6.10.4 Compatibility and equipment combination performance testing . 29
6.10.5 Donning and fit . 29
6.10.6 Ride-up . 29
6.10.7 Helicopter underwater escape . 30
6.10.8 Jump into water . 30
6.10.9 Freeboard . 31
6.10.10 Turning . 31
6.10.11 Self-righting . 31
6.10.12 In-water stability . 32
6.10.13 Freedom of movement and use of accessories . 32
6.10.14 Life raft boarding . 33
6.10.15 Rescue and recovery . 33
6.10.16 Escape buoyancy . 33
6.11 Crew equipment compatibility . 34
6.12 Reporting . 36
7 Marking . 36
8 Information supplied by the manufacturer . 37
Annex A (normative) Rating of breathing effort . 38
A.1 Instruction . 38
Annex B (informative) Evolution sheet. 39
Bibliography . 40

European foreword
This document (EN 4856:2023) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 4856:2018.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, I
...

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