ASD-STAN PREN 4697-2014 Aerospace series General and installation requirements for passenger seat fittings (Edition P 2).pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4697 Edition P 2 October 2014 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 Febr

2、uary 2011 and will supersede EN 4697:2012 Descriptors: ENGLISH VERSION Aerospace series General and installation requirements for passenger seat fittings Srie arospatiale Exigences gnrales et dinstallation pour sige passager Luft- und Raumfahrt Allgemeine und Einbau Anforderungen an die Sitzanbindun

3、g von Passagiersitzen This “Aerospace Series“ Prestandard 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 e

4、xperts of the concerned Domain following member comments. 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 revie

5、w by users and formal agreement of ASD-STAN, it will 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

6、the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st October 2014 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain Copyright 2014 by ASD-STAN prEN 4697:201

7、4 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Abbreviations . 4 4 Requirements . 4 5 Qualification .19 Annex A (informative) Standard evolution form .20 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and

8、 votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4697:2014 (E) 3 1 Scope This standard specifies the installation and removal requirements and the space envelopes for passenger seat fitt

9、ings on aircraft. The purpose is to reduce the installation time and the tooling required for seat installation by standardizing the seat attachment fasteners (fittings). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispen

10、sable 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. EN 9100, Aerospace series Quality Management Systems Requirements for Aviation, Space and Defence Organizations E

11、N 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts AMS 1424J, Aircraft Deicing/Anti-icing Fluids 1) AMS 1428F, Fluid, Aircraft De-icing/Anti-Icing, Non-Newtonian, (Pseudoplastic) 1) AMS 1550B, Cleaner, Water Base, Aircraft Interior Hard Surface M

12、aterials 1) AMS 1630C, Cleaner, Carpet, Shampoo Type 1) AMS 1631C, Cleaner, Carpet Water Extraction Type 1) AS8049B, Performance Standard for Seats in Civil Rotorcraft, Transport Aircraft and General Aviation A/C 1) CS-25 Amendment 5, 5 September 2008, Certification Specification for Large Aeroplane

13、s 2) FAR 25 Amendment 127, 28 October 2008, Airworthiness Standards: Transportation Category Airplanes 3) RTCA DO-160F 6 December 2007, Environmental Conditions and Test Procedures for Airborne Equipment 4) 1) Published by: SAE National (US) Society of Automotive Engineers http:/www.sae.org/ 2) Publ

14、ished by: European Aviation Safety Agency (EASA), Postfach 101253, D-50452 Koeln, Germany. 3) Published by: FAA National (US) Federal Aviation Administration http:/www.faa.gov/ 4) Published by: Radio Technical Commission for Aeronautics (RTCA), 1828 L Street, NW, Suite 805 Washington, DC 20036, USA.

15、 prEN 4697:2014 (E) 4 3 Abbreviations For the purposes of this standard, the following abbreviations apply. A/C Aircraft. Acc. According. Fwd Forward. SLD Shear Locking Device. 4 Requirements 4.1 General The fitting design shall fit within the given space envelope, according to Figure 1 and Figure 6

16、. Key 1 Monument 2 Fitting body 3 Carpet 4 Floor panel 5 Seat rail 6 Raceway Figure 1 Fitting environment 1 All fittings attached to seat legs shall be pre-set to the correct seat track dimensions with fine adjustment of the fitting during installation not being necessary. Minimum front to rear fitt

17、ing distance shall be 482,6 mm (19”) between the extreme studs of each fitting. Figure 2 Aircraft Coordinate System prEN 4697:2014 (E) 5 The front attachment fasteners shall cover the tolerances in X-direction (see Figure 2) that might occur due to installation tolerances (of the seat leg and of the

18、 A/C structure). The fitting weight shall be according to Table 1. Table 1 Fitting classes Fitting class Fitting Weight g A Rear triple stud fitting 150 B 250 C Rear quadruple stud fitting 200 D 290 E Forward single stud fitting 50 F 90 Maintenance or repair work on the seat track shall be taken int

19、o account during fitting design. Details see Figure 3. Dimensions in millimetres Figure 3a Seat track top view Figure 3b Seat track 3 D view continued prEN 4697:2014 (E) 6 Figure 3c Damage repair cross section 1 Figure 3d Damage repair cross section 2 Figure 3e Damage repair top view Key 1 If the am

20、ount of material removed on one side of a seat track exceeds 0,3 mm (0,012 inch) maximum in depth, it is necessary to remove the same amount from the other side, so that a level surface is achieved 2 Minimum remaining thickness after rework 3 Maximum rework depth as reference to nominal thickness Fi

21、gure 3 Seat track allowable damage limits and repair solutions The fitting design shall show no evidence of any movement/rattling of the fitting-track combination. A continuous load path shall be ensured at all times. A shear-locking device should only be incorporated in the rear fitting. Fitting de

22、sign and performance shall be validated incorporating the fitting-seat combination. prEN 4697:2014 (E) 7 4.2 Interface The fitting shall be compatible with the standard seat track concept, see Figure 4 and Figure 5 including the tolerances of the installed seat tracks see Figure 6 and Figure 7. Dime

23、nsion A Tolerance of 0,1 mm (0,004 inch) on 1 pitch Tolerance of 0,5 mm (0,020 inch) on 100 pitches Figure 4 Seat rail top view Detailed seat rail dimensions, see Table 2. Figure 5 Seat rail cross section prEN 4697:2014 (E) 8 Table 2 Seat rail dimensions Dimensions in millimetres (in inches) A B C D

24、 E H R1 R2 R3 min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max. 25,3 25,5 19,7 20,0 10,7 11,0 20,5 21,0 7,8 8,0 2,3 2,7 13,75 14,25 0 1,0 0,8 1,8 Full 1,0040,996 0,7870,776 0,4330,421 0,8270,807 0,3150,307 0,1060,091 0,0390 0,0710,031 Full NOTE 1 Diameter B an

25、d slot centerline D shall be coincident with slot centerline C to within 0,13 mm (0,005 inch). NOTE 2 All faces shall be within 0,5 of the specified position relative to the upper surface of the rail. Figure 6 Location tolerances of separate tracks prEN 4697:2014 (E) 9 Key 1 Seat track on section 1

26、2 Junction seat rail 3 Centerline of A1 A2 4 Seat track on section 2 A1 Last hole of seat track section 1 A2 Last hole of seat track section 2 Figure 7 Track splice tolerance in x The fitting shall be compatible with the currently marketed seat concepts. Therefore several clevis positions of the fit

27、ting should be available. The rear fitting shall have dimensions according to Figure 8 and Figure 9 and a compact design without any sharp edges or corners. The front fitting shall have dimensions according to Figure 10 and a compact design without any sharp edges or corners. Dimensions in millimetr

28、es Key 1 Shear pin 2 Stud 3 Fitting body Figure 8 Design example rear fitting bottom side prEN 4697:2014 (E) 10 Dimensions in millimetres Key 1 Bolt 2 Fitting body 3 Floor panel 4 Carpet 5 Seat rail 6 Reference only, 35 to 45 is the best angle for the load introduction Figure 9 Dimensions 2 rear fit

29、ting side view It shall be possible to route seat-to-seat cables by/alongside/near the fitting, which in turn shall not damage or squeeze the cables when the seats are shifted inside the rail. Therefore the width shall not exceed max. 25,4 mm (max. 1 inch), according to Figure 8 and Figure 10. Parti

30、cular attention shall be paid to galvanic corrosion between seat tracks and fitting materials. The seat track fitting material shall be corrosion resistant, considering not only the potential action of water/humidity, but also fluids and materials present in the normal seat environment, as well as p

31、assenger activity. 4.3 Installation Requirements The fitting shall be quickly lockable by one person without the need for any tools. A single tool Allen Key 3/16, or 5/16 shall be used for unlocking of the attachments fasteners. The maximum force for the locking operation shall not exceed (5 1) daN,

32、 respecting ergonomic aspects. The (pure) seat installation time, comprising two (2) Fwd and two (2) aft fittings, shall not exceed one (1) minute. The last seat row may have a longer installation time due to restricted accessibility of a monument installation (e.g. Doghouses, partitions, etc.). The

33、 SLD shall not include parts that have to be disassembled or removed from the device for seat position shifting, removal and installation. The locking motions of the fitting shall not damage the seat track, floor panels or any other component and their surfaces. A clear and reliable visible indicati

34、on for the SLD in locked position shall be incorporated in order to guarantee correct installation and engagement of the fitting. The SLD engagement/disengagement to the track shall be directly visible to personnel (e.g. quality inspector) standing in the longitudinal passenger aisle. prEN 4697:2014

35、 (E) 11 Unhindered access to the attachment fitting shall be considered, e.g. without the need to disassemble any parts of the seat or any adjacent components as stowages, doghouses, etc. The shifting of seats (movement of the seat in x-direction) fwd and aft shall be possible without having to remo

36、ve them from the seat rail. The fitting design shall prevent jamming in the seat rail, neither during changing the seat position nor during seat installation/removal. The fitting design shall allow seat reconfiguration within five (5) min (e.g. unlock, shift, re-lock of a seat group). For unfastenin

37、g operations of the fitting the environment shall be considered (e.g. floor panels, carpet, raceways, monuments), as per Figure 10. Dimensions in millimetres Key 1 Stud 2 Front seat leg 3 Shear pins 4 Rear seat leg 5 Fitting 6 Seat to seat cables 7 Seat track 8 Clearance fitting monument no tool acc

38、ess feasible 9 Monument Figure 10 Fitting Environment 2 prEN 4697:2014 (E) 12 4.4 Performance and Safety In order to avoid unfastening by unauthorized persons, unlocking shall only be possible by use of a tool, see 4.3. SLD Locking function/ device shall not require the use of safety wire. The front

39、 and rear fitting shall be protected against abuse loading from passenger feet and luggage. The fitting design shall avoid passenger injuries. The SLD shall be designed for positive engagement in the seat track. This positive engagement can be gravity, spring loading or self-locking under forward or

40、 downward inertia load factors or a combination of these. The SLD shall lock itself in the engaged position by an approved means to sustain flight, landing, abuse and ground test loads. Three (3) life cycle/performance tests shall be performed according to the following procedure: a) Operation of th

41、e locking device: The design shall consider a minimum use of 1 000 cycles operating of the locking device. 1) Fit into the seat track. 2) Lock. 3) Unlock. 4) Lift out of the seat rail. Pass/Fail criteria: Rattling. Friction. Play. Force for locking operation is still 1 daN of initial force. b) Movem

42、ent along the seat track: The design shall consider a minimum of 100 cycles movement along the seat track. Test rig with two (2) seat legs, distance 527 mm (two (2) front fittings, two (2) rear fittings) loaded weight 180 kg. 1) Movement along the seat track by 8”. 2) Lock. 3) Unlock. Pass/Fail crit

43、eria: Surface treatment not damaged so that the track material becomes visible c) Movement along the seat track, environmental conditions considered: The design shall consider a minimum of 100 cycles movement along the seat track. Test rig with two (2) seat legs, distance 527 mm (two (2) front fitti

44、ngs, two (2) rear fittings) loaded weight 180 kg. Environmental conditions: Sand, dust, fluids (anti- and de-icing agents according to AMS 1424J); AMS 1428F, coke, alcohol, distilled vinegar (10 % concentrated), cleaning agents according; prEN 4697:2014 (E) 13 AMS 1550B (normal), AMS 1630C and AMS 1

45、631C (carpet). 1) Movement along the seat track by 8”. 2) Lock. 3) Unlock. Pass/Fail Criteria: Fitting still operable. Test rig still movable. Test cycle duration shall not exceed five (5) minutes. Refer to the following chapters from: CS-25:2008, Amendment 5/FAR 25:2008, Amendment 127: 25.603 Mater

46、ials; 25.605 Fabrication methods; 25.607 Fasteners; 25.609 Protection of structure; 25.613 Material strength properties and Material Design Values; 25.621 Casting factors; 25.785 Seats, berths, safety belts and harnesses. 4.5 Stress requirements 4.5.1 Static requirements The seat rail attachment fit

47、ting shall be designed for the values stated in the Table 3 and Figure 11. Table 3 Interface Loads Stud Direction With fitting factor 1,33 incl. With fitting factor 1,33 incl. Fx Fy Fz daN daN daN daN Rear double, triple, quadruple Fx 2 700 Fy 1 600 Fz 3 500 Rxz 4 400 2 700 0 3 500 Ryz 3 800 0 1 600

48、 3 500 Rxyz 4 423 2 700 1 600 3 500 Front single Fx 2 700 Fy 1 600 Fz up 1 828 Fz down 3 500 Ryz 2 430 0 1 600 1 828 prEN 4697:2014 (E) 14 Dimensions in millimetres Key 1 Load application point 2 35 to 45 3 Resultant load a NOTE 30 mm recommended Figure 11 Load application rear fitting Interface loads not exceeding Fx 3 000 daN (incl. fitting factor) shall be supported without further investigation. For the fitting, it shall be ensured, that a combination of the stated loads can act simultaneously on the fitting at one point. Load application point, see Figure 12. Key 1 Load Fz 2 Load Fy 3 Lo