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SLOVENSKI STANDARD
oSIST prEN 4888:2022
01-december-2022
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: prEN 4888
ICS:
49.095 Oprema za potnike in Passenger and cabin
oprema kabin equipment
oSIST prEN 4888:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 4888:2022
oSIST prEN 4888:2022
DRAFT
EUROPEAN STANDARD
prEN 4888
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2022
ICS
English Version
Aerospace Series - Commercial aircraft passenger seats -
Reliability testing
Série aérospatiale - Sièges passagers d'avions Luft- und Raumfahrt - Fluggastsitze für die zivile
commerciaux - Essais de fiabilité Luftfahrt - Zuverlässigkeitstests
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4888:2022 E
worldwide for CEN national Members.
oSIST prEN 4888:2022
prEN 4888:2022 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Abbreviated terms . 7
5 Reliability testing of aircraft sub-seat components . 7
5.1 Failure behaviour . 7
5.2 Reliability characteristics and their conversion . 8
5.3 Aspect test cycle time versus flight time and range . 8
5.4 Determination of reliability characteristics . 9
5.5 Degradation . 12
6 General test conditions . 12
6.1 General. 12
6.2 ATD . 12
6.3 Loading devices . 14
6.3.1 Loading device for applied loads. 14
6.3.2 Loading device for impact . 14
6.3.3 Loading device for literature pockets . 15
6.3.4 Loading device for backrest . 15
6.3.5 Loading device for seat pan . 16
7 Reliability testing of backrest . 18
7.1 Test requirements . 18
7.2 Test procedure . 19
7.2.1 General. 19
7.2.2 Test procedure for load case A. 19
7.2.3 General note for test procedure for load case B to H . 20
7.2.4 Test procedure for load case B. 20
7.2.5 Test procedure for load case C and D . 21
7.2.6 Test procedure for load case E . 22
7.2.7 Test procedure for load case F . 23
7.2.8 Test procedure for load case G . 24
7.2.9 Test procedure for load case H . 25
7.3 Failure criteria . 27
8 Reliability testing of moveable headrest . 27
8.1 Test requirements . 27
8.2 Test procedure . 29
8.2.1 Test procedure for load case A. 29
8.2.2 Test procedure for load case B. 29
8.2.3 Test procedure for load case C . 30
8.2.4 Test procedure for load case D1 and D2 . 30
oSIST prEN 4888:2022
prEN 4888:2022 (E)
8.2.5 Test procedure for load case E . 32
8.2.6 Test procedure for load case F . 33
8.3 Failure criteria . 34
9 Reliability testing of armrest. 35
9.1 Test requirements . 35
9.2 Test procedure . 36
9.2.1 Test procedure for load case A . 36
9.2.2 Test procedure for load case B . 37
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 . 38
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 . 50
11.1 Test requirements . 50
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
oSIST prEN 4888:2022
prEN 4888:2022 (E)
European foreword
This document (prEN 4888:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardiza
...