Designation: F3231/F3231M − 17Standard Specif i cation forElectrical Systems in Small Aircraft 1This standard is issued under the f i xed 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 specif i cation covers international standards for theelectrical systems aspects of airworthiness and design for“small” aircraft.1.2 The applicant for a design approval must seek theindividual guidance of their respective CAA body concerningthe use of this specif i cation as part of a certif i cation plan. Forinformation on which CAA regulatory bodies have acceptedthis specif i cation (in whole or in part) as a means of compli-ance to their Small Aircraft Airworthiness regulations (herein-after referred to as “the Rules”), refer to ASTM F44 webpage(www.ASTM.org/COMMITTEE/F44.htm) which includesCAA website links.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 Following is a list of external standards referencedthroughout this specif i cation; 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: 2F3060 Terminology for AircraftF3061/F3061M Specif i cation for Systems and Equipment inSmall AircraftF3066/F3066M Specif i cation for Powerplant Systems Spe-cif i c Hazard MitigationF3117/F3117M Specif i cation for Crew Interface in AircraftF3235 Specif i cation for Electrical Storage Batteries in SmallAircraft2.3 FAA Standard:DOT/FAA/AR-00/12 Aircraft Materials Fire Test Hand-book 33. Terminology3.1 Terminology specif i c to this specif i cation is providedbelow. For general terminology, refer to Terminology F3060.3.2 Def i nitions of Terms Specif i c to This Standard:3.2.1 aircraft type code, n—an Aircraft Type Code (ATC) isdef i ned by considering both the technical considerations re-garding the design of the aircraft and the airworthiness levelestablished based upon risk-based criteria; the method ofdef i ning an ATC applicable to this specif i cation is def i ned inSpecif i cation F3061/F3061M.3.2.2 continued safe f l ight and landing, n—continued safef l ight and landing as applicable to this specif i cation is def i nedin Specif i cation F3061/F3061M.4. Electrical SystemsN OTE 1—Table 1 provides correlation between various Aircraft TypeCodes and the individual requirements contained within this section; referto 3.2.1. For each subsection, an indicator can be found under each ATCcharacter f i eld; three indicators are used:An empty cell ( ) in all applicable ATC character f i eld columnsindicates that an aircraft must meet the requirements of that subsection.A white circle (○) in multiple columns indicates that the requirementsof that subsection are not applicable to an aircraft only if all such ATCcharacter f i elds are applicable.A mark-out (×) in any of the applicable ATC character f i eld columnsindicates that the requirements of that subsection are not applicable to anaircraft if that ATC character f i eld is applicable.Example—An aircraft with anATC of 1SRLLDLN is being considered.Since all applicable columns are empty for 4.2.1, that subsection isapplicable to the aircraft. Since both the “L” stall speed column and the“D” meteorological column for 4.1.1 contain white circles, then thatsubsection is not applicable; however, for an aircraft with an ATC of1 This specif i cation 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 Feb. 15, 2017. Published March 2017. DOI: 10.1520/F3231_F3231M-17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.3 Available 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 Technical Barriers to Trade (TBT) Committee.1 Copyright by ASTM Int'l (all rights reserved); Fri Oct 6 11:25:55 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
