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BS G 257-3:2004

BS G 257-3:2004

$167.15

Design of electromagnetic hazard protection of civil aircraft – Guide to clearance and testing

Published By Publication Date Number of Pages
BSI 2004 42
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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.

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.

The guide does not contain mandatory requirements, only guidance to assist in the solution of design problems.

The guide does not cover:

  1. the protection of the airframe against the structurally damaging, direct effects of lightning;
  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 (MOPS). The problems of interaction between radio receivers and transmitters are still an important aspect of EMC problems;
  3. electrostatic discharge.

PDF Catalog

PDF Pages PDF Title
1 BRITISH STANDARD AEROSPACE SERIES
2 Committees responsible for this Britishļæ½Standard
3 Contents
5 Introduction
1 Scope
2 Normative references
6 3 Certification process
3.1 Planning
3.2 Route to certification
7 Route to certification
8 4 Functional criticality
4.1 General
4.2 Assessment of criticality
5 Certification rationale
5.1 General
9 Functional criticality
5.2 Whole aircraft test
5.3 Equipment tests
5.4 Analysis
5.5 Similarity
10 6 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
11 7.4 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
12 8 Equipment level testing
8.1 General
8.2 Magnetic effect
8.3 Powerļæ½input
8.4 Voltage spike
8.5 Audio frequency conducted susceptibility ā€” Power outputs
8.6 Induced susceptibility
8.7 RF susceptibility (radiated and conducted)
8.8 Emission of RF energy
13 8.9 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
14 10.2 Transceiver frequency matrix
15 10.3 Operational assessment
10.4 Measurements of the EM environment due to on-board RF sources
17 11 HIRF
11.1 General
11.2 Development of the external environment
18 11.3 Environments
11.4 Peak and average field strengths
11.5 Time factor of incident RF energy and aircraft in flight
19 11.6 Certification requirements
11.7 Major elements of conformity verification
Test requirements
21 Aircraft system function criticality
22 Routes to conformity
24 Routes to conformity ā€” Expanded view of steps 7 to 9
31 11.8 Maintenance, quality control, repair and modifications
12 System susceptibility to lightning
12.1 General
32 12.2 Certification for lightning protection
33 12.3 Certification Plan
12.4 Lightning performance assessment
36 13 Certification report
37 (informative) Requirements of the airworthiness authorities
(informative) Requirements of the airworthiness authorities
Requirements
Introduction
Direct effects
Indirect effects
38 Standards and specifications
Approaches to conformity demonstration
Routes
Direct effects
39 Indirect effects

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BS G 257-3:2004
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