1、Designation:F3227/F3227M17Standard Specification forEnvironmental Systems in Small Aircraft1This standard is issued under the fixed designation F3227/F3227M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A
2、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 international standards for theenvironmental system aspects of airworthiness and design for“small”aircraft.1.2 T
3、he applicant for a design approval must seek theindividual guidance of their respective CAA body concerningthe use of this specification as part of a certification plan.Forinformation on which CAA regulatory bodies have acceptedthis specification(in whole or in part)as a means of compli-ance to thei
4、r Small Aircraft Airworthiness regulations(herein-after referred to as“the Rules”),refer to the ASTM F44webpage(www.ASTM.org/COMMITTEE/F44.htm)which in-cludes CAA website links.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ine
5、ach 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 there
6、sponsibility 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 specification;the earliest revision ac
7、ceptablefor 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/F30
8、61M Specification for Systems and Equipment inSmall AircraftF3083/F3083M Specification for Emergency Conditions,Occupant Safety and AccommodationsF3230 Practice for Safety Assessments of Systems andEquipment in Small AircraftF3233/F3233M Specification for Instrumentation in SmallAircraft2.3 SAE Stan
9、dards:3SAE AIR825/4,Rev A Chemical Oxygen Systems3.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 conside
10、ring both the technical considerations re-garding the design of the aircraft and the airworthiness levelestablished based upon risk-based criteria;the method ofdefining an ATC applicable to this specification is defined inSpecification F3061/F3061M.3.2.2 BTPS,nBTPS stands for“Body Temperature andPre
11、ssure,Saturated;”this is defined to be a temperature of37C and a pressure equal to the ambient pressure to which thebody is exposed minus 6.27 kPa 47 mmHg;this is thetracheal pressure displaced by water vapor pressure when thebreathed air becomes saturated with water vapor at 37C.3.2.3 chemical oxyg
12、en generator,na chemical oxygengenerator is defined as a device which produces oxygen bychemical reaction;for more detailed information,refer to SAEAIR825/4.3.2.4 continued safe flight and landing,ncontinued safeflight and landing as applicable to this specification is definedin Specification F3061/
13、F3061M.3.2.5 probable,adjprobable means that the event is an-ticipated to occur one or more times during the entire opera-tional life of each aircraft.1This specification is under the jurisdiction ofASTM Committee F44 on GeneralAviation Aircraft and is the direct responsibility of Subcommittee F44.5
14、0 onSystems and Equipment.Current edition approved Feb.15,2017.Published March 2017.DOI:10.1520/F3227_F3227M-17.2For 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 stand
15、ards Document Summary page onthe ASTM website.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in acc
16、ordance 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 3.2.6 STPD,nSTPD stands for“Standard Temperatureand Pressure,Dry.”This is defined to be a temperature of 0 Cand a pressure equal to 101.33 kPa(760 mmHg)with no watervapor.4.VentilationNOTE1Table 1 provides correlation between variou
