ASTM_F_3231_-_F_3231M_-_19.pdf

Designation:F3231/F3231M19Standard Specification forElectrical Systems for Aircraft with Combustion EngineElectrical Power Generation1This standard is issued under the fixed designation F3231/F3231M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers electrical systems,electricalequipment,and electrical power distribution aspects of airwor-thiness and design for aeroplanes with combustion enginegeneration of electrical power.The material was developedthrough open consensus of international experts in generalaviation.This information was created by focusing on NormalCategory Aeroplanes.The content may be more broadlyapplicable;it is the responsibility of the applicant to substan-tiate broader applicability as a specific means of compliance.1.2 An applicant intending to propose this information asMeans of Compliance for a design approval must seek guid-ance from their respective oversight authority(for example,published guidance from applicable CAAs)concerning theacceptable use and application thereof.For information onwhich oversight authorities have accepted this specification(inwhole or in part)as an acceptable Means of Compliance totheir regulatory requirements(hereinafter“the Rules”),refer toASTMCommitteeF44webpage(www.astm.org/COMMITTEE/F44.htm).1.3 UnitsThis standard may present information in eitherSI units,English Engineering units,or both;the values statedin each system are not necessarily exact equivalents;therefore,to ensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 Following is a list of external standards referencedthroughout this specification;the earliest revision acceptablefor use is indicated.In all cases later document revisions areacceptable if shown to be equivalent to the listed revision,or ifotherwise formally accepted by the governing civil aviationauthority;earlier revisions are not acceptable.2.2 ASTM Standards:2F2490 Guide for Aircraft Electrical Load and Power SourceCapacity AnalysisF2639 Practice for Design,Alteration,and Certification ofAircraft Electrical Wiring SystemsF3060 Terminology for AircraftF3061/F3061M Specification for Systems and Equipment inSmall AircraftF3066/F3066M Specification for Aircraft Powerplant Instal-lation Hazard MitigationF3117/F3117M Specification for Crew Interface in AircraftF3235 Specification for Aircraft Storage BatteriesF3316/F3316M Specification for Electrical Systems for Air-craft with Electric or Hybrid-Electric Propulsion2.3 FAA Standard:3DOT/FAA/AR-00/12 Aircraft Materials Fire Test Handbook3.Terminology3.1 Terminology specific to this specification is providedbelow.For general terminology,refer to Terminology F3060.3.2 Definitions of Terms Specific to This Standard:3.2.1 aircraft type code,nan Aircraft Type Code(ATC)isdefined by considering both the technical considerations re-garding the design of the aircraft and the airworthiness levelestablished based upon risk-based criteria;the method of1This specification is under the jurisdiction ofASTM Committee F44 on GeneralAviation Aircraft and is the direct responsibility of Subcommittee F44.50 onSystems and Equipment.Current edition approved June 1,2019.Published June 2019.Originallyapproved in 2017.Last previous edition approved in 2017 as F3231/F3231M17.DOI:10.1520/F3231_F3231M19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Federal Aviation Administration(FAA),800 IndependenceAve.,SW,Washington,DC 20591,http:/www.faa.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Tec