{"id":332401,"date":"2024-10-19T23:09:29","date_gmt":"2024-10-19T23:09:29","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-g-257-32004\/"},"modified":"2024-10-25T22:01:08","modified_gmt":"2024-10-25T22:01:08","slug":"bs-g-257-32004","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-g-257-32004\/","title":{"rendered":"BS G 257-3:2004"},"content":{"rendered":"

This part of BS G 257 is written to assist engineers working at all levels within companies involved in the aircraft industry to meet the applicable EMH requirements.<\/p>\n

This part of BS G 257 is intended to assist engineers with planning the certification process and to ensure that the correct processes are applied to the writing of procedures and plans, and that the presently recognized methods of test are appropriately used.<\/p>\n

The guide does not contain mandatory requirements, only guidance to assist in the solution of design problems.<\/p>\n

The guide does not cover:<\/p>\n

    \n
  1. the protection of the airframe against the structurally damaging, direct effects of lightning;<\/li>\n
  2. the design of communication systems in order to produce interference free operation since it is felt that these aspects of RF systems design are covered in adequate detail in other documents e.g. Minimum Operational Performance Specification<\/i> (MOPS). The problems of interaction between radio receivers and transmitters are still an important aspect of EMC problems;<\/li>\n
  3. electrostatic discharge.<\/li>\n<\/ol>\n

    PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
    1<\/td>\nBRITISH STANDARD AEROSPACE SERIES <\/td>\n<\/tr>\n
    2<\/td>\nCommittees responsible for this British\ufffdStandard <\/td>\n<\/tr>\n
    3<\/td>\nContents <\/td>\n<\/tr>\n
    5<\/td>\nIntroduction
    1 Scope
    2 Normative references <\/td>\n<\/tr>\n
    6<\/td>\n3 Certification process
    3.1 Planning
    3.2 Route to certification <\/td>\n<\/tr>\n
    7<\/td>\nRoute to certification <\/td>\n<\/tr>\n
    8<\/td>\n4 Functional criticality
    4.1 General
    4.2 Assessment of criticality
    5 Certification rationale
    5.1 General <\/td>\n<\/tr>\n
    9<\/td>\nFunctional criticality
    5.2 Whole aircraft test
    5.3 Equipment tests
    5.4 Analysis
    5.5 Similarity <\/td>\n<\/tr>\n
    10<\/td>\n6 Certification plan
    6.1 General
    6.2 Contents
    7 Test plan
    7.1 Test plan key elements
    7.2 Outline description of the operation of the systems to be tested
    7.3 Pass\/fail criteria for each of the systems <\/td>\n<\/tr>\n
    11<\/td>\n7.4 Methods of achieving testable system modes
    7.5 Methods of response measurement to be used
    7.6 Preparing the aircraft and\/or system prior to test <\/td>\n<\/tr>\n
    12<\/td>\n8 Equipment level testing
    8.1 General
    8.2 Magnetic effect
    8.3 Power\ufffdinput
    8.4 Voltage spike
    8.5 Audio frequency conducted susceptibility \u2014 Power outputs
    8.6 Induced susceptibility
    8.7 RF susceptibility (radiated and conducted)
    8.8 Emission of RF energy <\/td>\n<\/tr>\n
    13<\/td>\n8.9 Lightning-induced transient susceptibility
    9 Power supply disturbances
    9.1 Main areas of disturbance
    9.2 Transients
    9.3 Over and under voltages
    9.4 Harmonics
    10 Inter-system EMC
    10.1 General <\/td>\n<\/tr>\n
    14<\/td>\n10.2 Transceiver frequency matrix <\/td>\n<\/tr>\n
    15<\/td>\n10.3 Operational assessment
    10.4 Measurements of the EM environment due to on-board RF sources <\/td>\n<\/tr>\n
    17<\/td>\n11 HIRF
    11.1 General
    11.2 Development of the external environment <\/td>\n<\/tr>\n
    18<\/td>\n11.3 Environments
    11.4 Peak and average field strengths
    11.5 Time factor of incident RF energy and aircraft in flight <\/td>\n<\/tr>\n
    19<\/td>\n11.6 Certification requirements
    11.7 Major elements of conformity verification
    Test requirements <\/td>\n<\/tr>\n
    21<\/td>\nAircraft system function criticality <\/td>\n<\/tr>\n
    22<\/td>\nRoutes to conformity <\/td>\n<\/tr>\n
    24<\/td>\nRoutes to conformity \u2014 Expanded view of steps 7 to 9 <\/td>\n<\/tr>\n
    31<\/td>\n11.8 Maintenance, quality control, repair and modifications
    12 System susceptibility to lightning
    12.1 General <\/td>\n<\/tr>\n
    32<\/td>\n12.2 Certification for lightning protection <\/td>\n<\/tr>\n
    33<\/td>\n12.3 Certification Plan
    12.4 Lightning performance assessment <\/td>\n<\/tr>\n
    36<\/td>\n13 Certification report <\/td>\n<\/tr>\n
    37<\/td>\n(informative) Requirements of the airworthiness authorities
    (informative) Requirements of the airworthiness authorities
    Requirements
    Introduction
    Direct effects
    Indirect effects <\/td>\n<\/tr>\n
    38<\/td>\nStandards and specifications
    Approaches to conformity demonstration
    Routes
    Direct effects <\/td>\n<\/tr>\n
    39<\/td>\nIndirect effects <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    Design of electromagnetic hazard protection of civil aircraft – Guide to clearance and testing<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2004<\/td>\n42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":332408,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[624,2641],"product_tag":[],"class_list":{"0":"post-332401","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-100-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/332401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/332408"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=332401"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=332401"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=332401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}