ASD-STAN PREN 4727-2015 Aerospace series Standardized passenger seat weight information (Edition P 2).pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4727 Edition P 2 December 2015 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition P 1 of Apr

2、il 2014 and will supersede EN 4727:2015 Descriptors: ENGLISH VERSION Aerospace series Standardized passenger seat weight information Srie arospatiale Dfinition standardise du poids dun sige passager Luft- und Raumfahrt Standardisierte Sitzgewichtsangaben fr Passagiersitze This “Aerospace Series“ Pre

3、standard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member c

4、omments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it w

5、ill be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by w

6、ithdrawing any national standards conflicting with the EN. Edition approved for publication 1st December 2015 Comments should be sent within six months after the date of publication to ASD-STAN Engineering Procedures Domain Copyright 2015 by ASD-STAN prEN 4727:2015 (E) 2 Contents Page Foreword 2 1 S

7、cope 3 2 Normative references 3 3 Abbreviations . 3 4 Requirements . 4 5 Template of seat weight lists 7 Annex A (informative) Standard evolution form . 8 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Engineering Procedures Domain. After inquiries and votes car

8、ried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4727:2015 (E) 3 1 Scope The weight for cabin equipment is an important topic in the aviation business. The cabin equipment weight has a direct impa

9、ct on the payload of the aircraft, operation cost and revenue of the airlines. Due to the number of aircraft seats, seats are one of the major weight drivers in the cabin. At this time a lot of seat weights are used without any clear definition, e.g. allowable max. weight, certified weight, defined

10、weight. For the definition of each customer specific cabin definition it is important to get comparable seat weights. Aircraft seats are very different with regard to seat envelope dimensions and integrated features and options. For a weight calculation and product comparison it is very helpful to g

11、et comparable weight information based on a standard weight. The aim of this standard is to define a clear definition for the different weight information and a baseline for a seat weight calculation to get comparable seat weights for set brochures and marketing reasons. 2 Normative references The f

12、ollowing documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. CS-25, Certi

13、fication Specification for Large Aeroplances 1) 3 Abbreviations For the purposes of this document, the following abbreviations apply. A/C Aircraft B/C Business class E/C Economy class F/C First class FAI First article inspection IAT in-armrest table IFE Inflight-entertainment IIL Installation Instru

14、ctions and Limitations OEMs original equipment manufacturer PCU Power control unit P/N Part number SEB Seat electronic box Std. Standard 1) Published by: European Aviation Safety Agency (EASA), Postfach 101253, D-50452 Koeln, Germany. prEN 4727:2015 (E) 4 4 Requirements 4.1 General Aircraft seats ar

15、e highly customized and the final seat weight always depends on the specific customer requests. In order to get a clear weight definition and to cover all needs of the OEMs, airlines and seat suppliers, following seat weights needs to be clearly defined: a) Catalogue seat weight; b) Estimated seat w

16、eight; c) Calculated seat weight; d) Actual seat weight empty; e) Maximum seat weight loaded; f) Maximum certified seat weight; g) Defined seat weight. 4.2 Catalogue seat weight 4.2.1 Economy class (E/C) seats The catalogue seat weight is a theoretical seat weight, evaluated based on a pre-defined s

17、eat definition. The catalogue seat weight shall be used for marketing reasons in seat catalogues and seat brochures. The catalogue weight according to this document ensures the availability of comparable weight information for the seat models offered on the market. The catalogue seat weight shall be

18、 evaluated for a Std. triple and front row triple seat with a seat width of 62 in (1 575 mm) measured from the most inboard to the most outboard point and installed on two (2) straight seat legs. Following parts need to be considered: a) Primary structure: 1) Two (2) seat legs, including two (2) fro

19、nt and two (2) rear fittings; 2) Base members / seat track covers between front and rear fittings; 3) Baggage bar under all three (3) seat places; 4) Beams (front and rear if two (2) beams); 5) Seat spreaders; 6) Seat pans; 7) Seat belt attachments. b) Secondary structure: 1) One (1) fixed armrest s

20、tructure outboard; 2) Two (2) armrest structures for foldable centre armrest (for front row seats two (2) fixed armrests with integrated in-armrest tables); prEN 4727:2015 (E) 5 3) One (1) armrest structure for a foldable armrest aisle side for handicapped people (for front row seats one (1) fixed a

21、rmrest with integrated in-armrest table); 4) Three (3) backrest structures; 5) Three (3) recline mechanisms (if a seat is offered only with no recline it needs to be indicated); 6) One (1) aisle side stewardess step; 7) All smaller structure items needed, e.g. gap closures. c) Seat cushion assemblie

22、s: Std. as offered by the seat supplier including fire blocking layer if needed. d) Backrest cushion assemblies: Std. as offered by the seat supplier including fire blocking layer if needed. e) Seat belts: Three (3) Std. seat belts, weight: 315 g / seat belt. f) Backrest tables: Three (3) standard b

23、ackrest table kits this includes the table itself, table latch and any optional functions e.g. sliding mechanism and each related means of attachment to seat structure (if a seat table is offered only with no sliding mechanism it shall be indicated). g) Literature pockets: One (1) on each backrest,

24、minimum size DIN A4. Detailed design up to seat supplier. h) Life vest pockets: Three (3) life vest pockets, one (1) under each seatplace, designed for a life vest size of 240 mm 240 mm 90 mm and a weight of 600 g / life vest. i) Trim and finish: 1) Seat cover fabric, uni colour / no pattern: 750 g/

25、m2; 2) All plastic fairings for armrests need to be included; 3) Trolley guard strip (rub strips) on aisle side; 4) Armrest covers; 5) Backrest fairings. j) Trim strips (e.g. edge protection tape, hook and loop tapes, ) All non-metallic components and materials shall fulfil the criteria of CS 25. Th

26、e weight impact of any offered option like ashtrays, cup holders, coat hooks, leg or footrest, floatation cushions, IFE or IFE provisions (like shroud or swivel mechanism, etc.) shall be indicated in a separate table. IFE shall be considered with following baseline definition: a) IFE monitor (if in-

27、seat video is offered); b) One (1) SEB; c) Three (3) PCUs; prEN 4727:2015 (E) 6 d) Needed in-seat cables. As the specific weight of IFE equipment is varying, following classification in Table 1 shall be used for total IFE weight per triple seat as defined in this paragraph: Table 1 Classification fo

28、r total IFE weight per pax Classification Total IFE weight per pax Class A 500 g Class B 501 g to 1 000 g Class C 1 001 g to 1 500 g Class D 1 501 g to 2 000 g Class E 2 000 g 4.2.2 First class (F/C) and Business class (B/C) seats F/C and B/C seat concepts are very different and often highly customi

29、zed. The definition of the calculated seat weight is up to the seat supplier. The weight information shall be based on the same fabric, seat belt and life vest information as defined for the economy class seat. The rest of the detailed design is up to the seat supplier, but a clear list of considere

30、d features and options including IFE and monitor size is to be provided by the seat supplier with the calculated seat weight. 4.3 Estimated seat weight The estimated seat weight is the estimated seat weight empty for each seat part number (P/N) (single, double, triple quadruple) as estimated during

31、the pre-design phase according to the specific customer request including customer specific trim and finish and all accessories. e.g. IFE, seat actuation, reading lights, seat belts etc. (but without any life vests). In general for a detailed weight list the component break down as listed in 4.2 can

32、 be used. The estimated weight is based on estimated weight of single parts and estimations on previous designs. 4.4 Calculated seat weight The calculated seat weight is the calculated seat weight empty for each seat part number (P/N) (single, double, triple quadruple) as calculated based on drawing

33、s/models released for manufacturing during the design phase according to the specific customer request including customer specific trim and finish and all accessories. e.g. IFE, seat actuation, reading lights, seat belts etc. (but without any life vests). In general for a detailed weight list the co

34、mponent break down as listed in 4.2 can be used. The calculated seat weight is based on the weight of the single parts. 4.5 Actual seat weight empty The actual seat weight empty is the weight of each seat part number (P/N) (single, double, triple quadruple) as designed according to the specific cust

35、omer request including customer specific trim and finish and all accessories. e.g. IFE, seat actuation, reading lights etc. In general for a detailed weight list the component break down as listed in 4.2 can be used. Consider the seat as ready for aircraft installation. The weight will be finally ch

36、ecked during first article inspection (FAI). The seat unit will be weighed empty as delivered to the OEM fully equipped with seat belts, cushions, dress covers, IFE but without any life vest and other weight of contents for any stowage compartments or literature pockets. The actual weight empty need

37、s to be shown in the seat delivery documentation like drawings and weight reports. prEN 4727:2015 (E) 7 4.6 Maximum seat weight loaded The maximum seat weight loaded is the actual seat weight empty as defined in 4.5 plus. a) Maximum weight for content of literature pockets (magazines); b) Maximum we

38、ight for life vests; c) Maximum weight for content of other stowage compartment. The maximum seat weight loaded shall be mentioned in addition to the actual seat weight empty on the seat supplier drawings. 4.7 Certified seat weight The certified seat weight is the maximum seat weight loaded as defin

39、ed in 4.6 plus. a) Weight for under-seat baggage of 9,1 kg (20 lb) per seat place; b) Weight for passengers 77,0 kg (170 lb) per seat place; c) Additional weight for any item of mass in order to cover any additional seat option with the seat certification; The certified seat weight shall be listed i

40、n the certification documentation like static and dynamic test reports, installation instructions and limitations (IIL). 4.8 Defined seat weight The defined seat weight is to be negotiated between the seat supplier and the purchaser. If not otherwise agreed as guideline the defined seat weight is th

41、e actual seat weight empty with a tolerance of 3 %. 5 Template of seat weight lists The following attached seat weight template shall be used for weight information on seat brochures, weight reports, drawings, and qualification / certification documents. NOTE The template is an Excel file attached t

42、o the PDF. prEN 4727:2015 (E) 8 Annex A (informative) Standard evolution form The main changes with respect to the previous edition are listed in Table A.1. Table A.1 Main changes to previous edition prEN/EN Number Edition Publication Date Modification Reason and validation 4727 P1 04/2014 Calculate

43、d seat weight in P1 re-named in catalogue seat weight in P2 Was in contradiction to the seat weight definition used in the aircraft industries Estimated seat weight added Used in the aviation industry during the design phase Calculated seat weight added Used in the aviation industry during the design phase Text updated accordingly Some minor wording corrections Attached weight templates updated accordingly