ASTM_F_2339_-_06_2009.pdf

Designation:F233906(Reapproved 2009)Standard Practice forDesign and Manufacture of Reciprocating Spark IgnitionEngines for Light Sport Aircraft1This standard is issued under the fixed designation F2339;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers minimum requirements for thedesign and manufacture of reciprocating spark ignition enginesfor light sport aircraft,VFR use.1.2 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.Significance and Use2.1 This practice provides designers and manufacturers ofengines for light sport aircraft design references and criteria touse in designing and manufacturing engines.2.2 Declaration of compliance is based on testing anddocumentation during the design and testing or flight testing ofthe engine type by the manufacturer or under the manufactur-ers guidance.3.Engine Model Designation3.1 Engine Parts ListA parts list is required for eachengine model qualified in accordance with this specification.3.2 New Engine Model Designations:3.2.1 Each new engine model must be qualified in accor-dance with this practice.3.2.2 Design or configuration changes that impact the in-stallation interface,performance,or operability of the enginerequire a new engine model designation.3.3 Design Changes of PartsEach design change of a partor component of an engine model qualified to this specificationshould be evaluated relative to the requirements of thisspecification.4.Data Requirements4.1 Retained DataThe following data and informationshould be retained on file at the manufacturers facility for at aminimum of 18 years after production is discontinued.4.1.1 Drawings that define the engine configuration.4.1.2 Material and process specifications referenced in theparts drawings.4.1.3 Engineering analyses and test data prepared for quali-fication with this specification.4.2 Delivered DataThe following data should be deliv-ered to the airplane manufacturer to support design andoperation of the applicable airplane.4.2.1 An engine performance specification that defines theengine performance under all anticipated operating environ-ments.4.2.2 An installation manual that defines all functional andphysical interface requirements of the engine.This shouldinclude an engine outline/installation drawing.4.2.3 An operating manual that defines normal and abnor-mal operating procedures and any applicable operating limita-tions.4.2.4 A maintenance manual that defines periodic installedmaintenance,major inspection,overhaul intervals,and anyother maintenance limitations.4.2.5 An overhaul manual that provides instruction fordisassembling the engine to replace or repair,or both,parts asrequired to return the engine to airworthy condition that is safefor operation until the next major overhaul.5.Design Criteria5.1 MaterialsThe materials used in the engine must beadequate for the intended design conditions of the engine.5.2 Fire PreventionThe design and construction of theengine and the materials used must minimize the probability ofthe occurrence and spread of fire by:5.2.1 Using fire-resistant lines,fittings,and other compo-nents that contain a flammable liquid when supplied with theengine;and5.2.2 Shielding or locating components to safeguard againstthe ignition of leaking flammable fluid.5.3 Engine CoolingThe engine design must include pro-visions for cooling;the installation manual must specify engineand component temperature limitations.5.4 Engine MountingAttach points on the engine musthave data for the correct design of mounting structures to the1This practice is under the jurisdiction of ASTM Committee F37 on Light SportAircraft and is the direct responsibility of Subcommittee F37.70 on Cross Cutting.Current edition approved Jan.1,2009.Published March 2009.Originallyapproved in 2004.Last previous edition approved in 2006 as F2339 06.DOI:10.1520/F2339-06R09.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 airframe.The maximum allowable limit and ultimate loads forthe engine mounting attachments and related structure must bespecified.5.5 Ignition SystemsEach spark ignition engine must havea dual-ignition system with at least two spark plugs for eachcylinder and two separate electric circuits with separate sourcesof electrical energy,or have an ignition system of equivalentin-flight reliability.System maintenance must be specifiedunder the maintenance manual supplied by the manufacturer.5.5.1 Engines used in aircraft where the engine is notrequired for fl