1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AIR6448AEROSPACEINFORMATIONREPORTAIR6448 Issued 2011-06 Gaining Approval for Seats with Integra
5、ted Electronics in Accordance with AC21-49 Option 7b TABLE OF CONTENTS 1.SCOPE 22.REFERENCES 33.DEFINITIONS . 44.ACRONYMS . 55.ELECTRONICS MANUFACTURER RESPONSIBILITIES* . 76.SEAT SUPPLIER RESPONSIBILITY* 87.SEAT INTALLER RESPONSIBILITY* 98.CONCLUSION 9APPENDIX A KEY CHARACTERISTICS 10A.1QUESTIONS A
6、ND CLARIFICATIONS . 16FIGURE A1 TYPICAL INTEGRATION OF ELECTRONIC COMPONENTS 14FIGURE A2 ELECTRONIC COMPONENT EXAMPLES 15TABLE A1 KEY CHARACTERISTICS (TO MEET AC21-49 TABLE 1 CRITERIA) TYPICAL ITEMS 10TABLE A2 (REF. AC21-49, TABLE 1) 16SAE AIR6448 Page 2 of 171. SCOPE This document provides an indus
7、try recommended framework for establishing a multi-party agreement to support approval of electronic components (e.g., actuation system, reading light, inflatable restraint, IFE, etc.) integrated in aircraftseats and provide a framework that allows seat manufacturers to build and ship completed, int
8、egrated, and approved seat assemblies with electronics included. The primary purpose of this document is to provide roles, responsibilities and accountabilities to meet AC 21-49 Section 7.b Type Certification using TSO-approved seat with electronic components defined in TSO design. This document may
9、 be applied to all applicable seat TSOs (C39(), C127()etc). The approval for the integration of the electronics will fall, in part or in full, under the type design authority of the Seat Installer rather than the Seat Supplier shipping the integrated seat. The defined responsibilities, areas of auth
10、ority and accountability of each party, as well as necessary communication protocols, must ensure configuration management, design control and quality control. These definitions, controls and protocols are agreed (thru normal commerical agreements and binding contracts) and adhered to by all parties
11、 ensuring all parts in the supply chain remain approved (e.g. certified and conformed). Table A1 of Appendix A of this document contains information which details the key characteristics of electronic equipment that require review to ensure proper compliance with the TSO requirements per Table 1 of
12、AC 21-49. 1.1 Regulatory and Business Model It is important to recognize that industry and the FAA have different needs when it comes to getting a seat with electronics approved for use in an aircraft. The FAA looks at certification strictly from a regulatory point of view and to whom they issue the
13、 various approvals. The FAA holds the approval holder responsible for ensuring all aspects under that approval are met, regardless of how industry establishes the business arrangements. For industry, we have to meet regulatory obligations under each approval, but have the flexibility of establishing
14、 business arrangements to achieve those obligations. This document will define the responsibilities from both a regulatory perspective and a business perspective. Without commitment to establish and maintain these business arrangements, success will not be achieved in meeting regulatory responsibili
15、ties.There are many different ways a seat with electronic components can be approved for use in an aircraft. However, the guidance that follows is based on one acceptable model that has widespread use and involves three entities - a Seat Installer, a Seat Supplier, and an Electronics Manufacturer as
16、 defined below. Seat Supplier: The party that attains a TSO approval for the seat with integrated electronic components. A TSO approval can be either a TSO authorization (TSOA) or letter of TSO design approval (LODA). Seat Installer: The party that attains a TC (or STC) for the installation and acti
17、vation of the seat with integrated electroniccomponents in the aircraft. The TC/STC approval covers the seats installation into the aircraft and the installation and activation of the electronic components into the aircraft. Electronics Manufacturer: The party that manufacturers electronic component
18、s to be used in the installation and collaborates with both the Seat Supplier and the Seat Installer. The Electronics Manufacturer may be a production approval holder. SAE AIR6448 Page 3 of 171.1.1 Overview of Responsibilities (Post AC 21-49 Business Practice) 2. REFERENCES The following publication
19、s form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of the other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references ci
20、ted herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-
21、7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AS8049 Seat Performance Standard 2.2 FAA Publications Available from Federal Aviation Administration, 800 Independence Avenue, SW, Washington, DC 20591, Tel: 866-835-5322, www.faa.gov.AC 21-49 Gaining Approval of Electronic Comp
22、onents in Seats AC25.562-1 FAA Advisory Circular - Dynamic Evaluation of Seat Restraint Systems and Occupant Protection on Transport Airplanes AC25.853-1 FAA Advisory Circular - Flammability Requirements for Aircraft Seat Cushions AC25.785-1 FAA Advisory Circular - Flight Attendant Seat and Torso Re
23、straint System Installations AC25-17 FAA Advisory Circular - Transport Airplane Cabin Interiors Crashworthiness Handbook Major/Minor Change Memo: Classification of Design Changes to TSO-C39b, TSO-C127, however, final formulationisidentical x Polymers- Alterationsdue onlytoin-process changes; however
24、,final formulationisidentical Physical Properties- x Improved impact resistanceortoughness basedonindustry standardsConstruction-x Location changesofinternal structure,joints, compositepart layouts whichdonot bridgeorsupportmainhousingx Minor changesincross section x Minor changesinshape andsizeSAE
25、AIR6448 Page 11 of 17Attributesaffecting TSO per Table 1 of AC21-49Changes which require detail evaluation to complywithTSO requirements Changes which require review, however, maynot require detail evaluation Flammability requirements asapplicabletoeachTSO Item 4 See Figure A1&A2 Flammability Chemic
26、al Properties Traditional parts x Significant materialtype, construction and/orformulation changesrequiringcompliance to 14 CFRPart25.853ASmallParts x Significant size and/ornumber changes requiringcompliance to 14 CFR Part 25.853a andwould haveinitiallybeenclassifiedas“smallparts“ LargeParts x Soft
27、warechanges (TTL Position only) which alter the exposureofmaterials classifiedasnon-exposedtothe cabin x Changes to materials usedtomanufacture largepanels requiredtomeet 14CFRPart25.853D&E(SeeApplicable SpecialConditions for Flammability for additional guidance)Flammability Chemical properties Trad
28、itional parts x Minor material type, construction and/orformulation changesrequiring compliance to 14 CFRPart25.853ASmallpartsx Size andnumber continuingtomeet 14 CFRPart25.853A“small parts“ requirements LargeParts x Softwarechanges (TTL Position only) which do not alter theexposure of materials cla
29、ssifiedasnon-exposedtothe cabin x (SeeApplicable SpecialConditions for Flammability for additional guidance)Mass, location, and centerofgravity of electroniccomponents onseat under dynamic loading Item 5 See Figure A1&A2 Significant changes in accordancewiththe Evaluation Criterion andDefinitionsMin
30、or changesinaccordance withthe Evaluation Criterion andDefinitions Effect on head injury criteria forelectroniccomponents mountedinseat backs or armrests Item 6 See Figure A 1&A2 Samerequirementslistedfor delethalizationattributes Significant changes in accordancewiththe Evaluation Criterion andDefi
31、nitionsSamerequirementslistedfor delethalizationattributes Minor changesinaccordance withthe Evaluation Criterion andDefinitions Effect on lumbar loads for electronic components mountedunder seat Item 7 See Figure A1&A2 Significant changes in accordancewiththe Evaluation Criterion andDefinitionsNote
32、:Only weight andattachments must beconsideredfor componentsoutsideofthe contact zonesfor the pelvic regionasdefinedinAC25.562-1.Minor changesinaccordance withthe Evaluation Criterion andDefinitions SAE AIR6448 Page 12 of 17Attributesaffecting TSO per Table 1 of AC21-49Changes which require detail ev
33、aluation tocomply withTSO requirements Changes which require review, however, maynot require detail evaluation Evaluation Criterion and Definitions Significant changes in mass, location, CG or software(controlling seat dimensionsonly)MassSub-component changes which elevates thetotalassembledweight b
34、eyondqualified weights(including drawingtolerances) LocationShiftsinlocation in anydirection which createshigher loadsonthe matingstructural components and/or final assemblySoftware Changes which alter the seat featuresinthe TTLpositionCGShift in CGwhich will raisethe CG of mating structuralcomponen
35、ts and/or final assembly. Minor changesinmass, location, CG or software(controlling seat dimensionsonly)MassSub-component changes which are equivalent or lower than thetotalassembledweight fora qualified design(including drawingtolerances)LocationShiftsinlocation in anydirection which createsequival
36、ent or lower loadsonthe matingstructural components and/or final assemblySoftware Changes which do not alter theseat featuresinthe TTLpositionCGShiftin CGwhich will lower theCG of mating structuralcomponents and/or final assembly. Allchanges must be documentedwiththe level of data necessarytosubstan
37、tiate that the changedarticle(s) continuestomeet TSO. Detail evaluationsare as extensiveasnecessarytoshowcompliance to therequirementsand must be supported by product development history, in-depthanalysisand/or additional testingusedtosupportthe original certificationactivity. In allcases, detailede
38、valuations require morethaninspection or simpleanalysistoaddresschange. SAE AIR6448 Page 13 of 17FIGURE A1 TYPICAL INTEGRATION OFELECTRONIC COMPONENTSTableA1 andFigures A1 andA2areonly intended to be aguideand donot address all electroniccomponents requiredtomeet Table1 attributesidentifiedinAC 21-4
39、9.SAE AIR6448 Page 14 of 17FIGURE A2 ELECTRONICCOMPONENTEXAMPLES SAE AIR6448 Page 15 of 17SAE AIR6448 Page 16 of 17A.1 QUESTIONS AND CLARIFICATIONS A.1.1 What is the purpose of Table A1? Table A1 provides guidance on the appropriate means of meeting design and quality control requirements for electr
40、onic equipment as outlined in Table 1 of AC21-49. Table A1 specifically addresses the means for establishing key characteristics of electronic components (including IFE, actuation systems, inflatable restraint system, PC power, reading light, etc) that, if changed, would impact the seat TSO and woul
41、d affect the design and quality control of the TSO approved article. Please note that to ensure the Seat Installers continued airworthiness responsibility a notification process must be established between the Seat Installer, the Seat Supplier and the Electronics Manufacturer to properly review and
42、address change control. A.1.2 What do the current regulations say regarding “Design & Quality Control” as defined in Part 21? 14CFR 21.601(b)(5): An article manufacturer is the person who controls the design and quality of the article produced (or to be produced, in the case of an application), incl
43、uding the parts of them and any processes or services related to them that are procured from an outside source. With the release of AC21-49, the FAA has established one method for meeting the requirements of 14 CFR Part 21.601(b)(5). In order to meet design and quality control requirements for the T
44、SO approved articles, the specific attributes listed below in Table 1 of AC21-49 must be properly documented in qualification reports, product monitored by the quality assurance system and control measures in place to address change. TABLE A2 (REF. AC21-49, TABLE 1) Item TSO-C39 TSO-C127 Strength of
45、 attachment of electronic components to seatYes YesMass, location, and center of gravity (cg) of electronic components on seat under static loadingYes YesSharp edges (delethalization) Yes YesFlammability* Yes YesMass, location, and cg of electronic components on seat under dynamic loadingN/A YesEffe
46、ct on head injury criteria (HIC) for electronic components mounted in seat backs or arm restsN/A YesEffect on lumbar loads for electronic components mounted under the seat N/A Yes* See specific TSO for flammability requirements. Each seat TSO is different A.1.3 What are examples of the specific key
47、characteristics for each attribute listed in Table 1 of AC21-49? Table A1 has been created for addressing this question. SAE AIR6448 Page 17 of 17A.1.4 Why is Table A1 needed? In order to ensure proper design and quality control of electronic components listed in Table 1 of AC21-49, Table A1 is inte
48、nded to identify and address key characteristic of each attribute to establish standard design review process for the initial design and design changes. In addition, with the key characteristics identified in Table A1, the Seat Suppliers quality control system can be aligned to ensure the proper ins
49、pections to maintain conformity. A.1.5 Will only meeting Table A1 key characteristics satisfy proper design and quality control? It is our intention that the Table A1 contents have been constructed based on the knowledge of the design and construction techniques commonly integrated in todays electronic components and will satisfy regulatory requirements. However, i
