SIST EN 4888:2024

Aerospace Series - Commercial aircraft passenger seats - Reliability testing

This document specifies minimum reliability test requirements for sub-components of commercial
aircraft passenger seats. Test procedures including in-service load cases regarding passenger behaviour
for sub-seat components are specified. Abuse loads are excluded. This document is applicable to the
sub-seat components such as but not limited to backrest, headrest, armrest, table, literature pocket and
control elements.
This document does not apply to belts, Inflight-Entertainment, seat dress cover and cushions.
Additional environmental influences like temperature, radiation, gases and liquids may also alter the
reliability of the aircraft passenger seats and their sub-components over their lifetime but are not taken
into consideration in this document.
Tests on abrasion and surface durability are specified in EN 4860, EN 4864 and EN 4876.

Luft- und Raumfahrt - Fluggastsitze für die zivile Luftfahrt - Zuverlässigkeitstests

Série aérospatiale - Sièges passagers d’avions commerciaux - Essais de fiabilité

Le présent document spécifie les exigences minimales des essais de fiabilité pour les sous-composants des sièges passagers des aéronefs commerciaux. Des procédures d'essai comprenant des cas de charge en service concernant le comportement des passagers pour les sous-composants de sièges sont définies. Les charges excessives sont exclues. Ce document est applicable aux sous-composants de sièges tels que, sans toutefois s'y limiter, le dossier, l’appuie-tête, les accoudoirs, la tablette, la pochette à documentation et les organes de commande.
Le présent document ne s’applique pas aux ceintures, systèmes de divertissement à bord, housses et rembourrages de siège.
D'autres éléments environnementaux tels que la température, les rayonnements, les gaz et les liquides peuvent également avoir un impact sur la fiabilité des sièges passagers d’aéronefs et de leurs sous-composants au cours de leur vie, mais ils ne sont pas pris en compte dans le présent document.
Des essais d'abrasion et de durabilité des surfaces sont définis dans l’EN 4860, l’EN 4864 et l’EN 4876.

Aeronavtika - Potniški sedeži v komercialnih letalih - Preskušanje zanesljivosti

General Information

• Status: Published
• Public Enquiry End Date: 17-Jan-2023
• Publication Date: 16-Sep-2024
• ICS: 49.095 - Passenger and cabin equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Sep-2024
• Due Date: 21-Nov-2024
• Completion Date: 17-Sep-2024
• Ref Project: EN 4888:2024 - Aerospace Series - Commercial aircraft passenger seats - Reliability testing

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2024
Aeronavtika - Potniški sedeži v komercialnih letalih - Preskušanje zanesljivosti
Aerospace Series - Commercial aircraft passenger seats - Reliability testing
Luft- und Raumfahrt - Fluggastsitze für die zivile Luftfahrt - Zuverlässigkeitstests
Série aérospatiale - Sièges passagers d’avions commerciaux - Essais de fiabilité
Ta slovenski standard je istoveten z: EN 4888:2024
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 4888
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2024
EUROPÄISCHE NORM
ICS 49.095
English Version
Aerospace Series - Commercial aircraft passenger seats -
Reliability testing
Série aérospatiale - Sièges passagers d'aéronefs Luft- und Raumfahrt - Fluggastsitze für die zivile
commerciaux - Essais de fiabilité Luftfahrt - Zuverlässigkeitsprüfung
This European Standard was approved by CEN on 22 April 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4888:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Abbreviated terms . 7
5 Reliability testing of aircraft sub-seat components . 8
5.1 Failure behaviour . 8
5.2 Reliability characteristics and their conversion . 8
5.3 Aspect test cycle time versus flight time and range . 9
5.4 Determination of reliability characteristics . 10
5.5 Degradation . 13
6 General test conditions . 13
6.1 General. 13
6.2 ATD . 13
6.3 Loading devices . 15
6.3.1 Loading device for applied loads. 15
6.3.2 Loading device for impact . 15
6.3.3 Loading device for literature pockets . 16
6.3.4 Loading device for backrest . 16
6.3.5 Loading device for seat pan . 17
7 Reliability testing of backrest . 18
7.1 Test requirements . 18
7.2 Test procedure . 20
7.2.1 General. 20
7.2.2 Test procedure for load case A. 20
7.2.3 General note for test procedure for load case B to H . 21
7.2.4 Test procedure for load case B. 21
7.2.5 Test procedure for load case C and D . 22
7.2.6 Test procedure for load case E . 23
7.2.7 Test procedure for load case F . 24
7.2.8 Test procedure for load case G . 25
7.2.9 Test procedure for load case H . 26
7.3 Failure criteria . 27
8 Reliability testing of moveable headrest . 28
8.1 Test requirements . 28
8.2 Test procedure . 29
8.2.1 Test procedure for load case A . 29
8.2.2 Test procedure for load case B . 30
8.2.3 Test procedure for load case C . 31
8.2.4 Test procedure for load case D1 and D2 . 31
8.2.5 Test procedure for load case E . 33
8.2.6 Test procedure for load case F . 33
8.3 Failure criteria . 34
9 Reliability testing of armrest. 34
9.1 Test requirements . 34
9.2 Test procedure . 36
9.2.1 Test procedure for load case A . 36
9.2.2 Test procedure for load case B . 36
9.2.3 Test procedure for load case C . 37
9.2.4 Test procedure for load case D . 38
9.2.5 Test procedure for load case E . 39
9.2.6 Test procedure for load case F . 39
9.2.7 Test procedure for load case G . 40
9.2.8 Test procedure for load case H . 40
9.2.9 Test procedure for load case I . 41
9.2.10 Test procedure for load case J . 42
9.3 Failure criteria . 43
10 Reliability testing of table . 44
10.1 Test requirements . 44
10.2 Test procedure . 45
10.2.1 General . 45
10.2.2 Test procedure for load case C . 47
10.2.3 Test procedure for load case D . 48
10.3 Failure criteria . 49
11 Reliability testing of literature pocket . 49
11.1 Test requirements . 49
11.2 Test procedure . 50
11.2.1 Test procedure for load case A . 50
11.2.2 Test procedure for load case B. 51
11.3 Failure criteria . 51
Annex A (informative) Random failure behaviour rate . 53
Bibliography . 54

European foreword
This document (EN 4888:2024) has been prepared by the 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 nationa
...