MIL-E-5400T &##!#l&79 MIL-E-5400R 31 October 1975 Supersession (see 6.8) data MILITARY SPECIFICATION ELECTRONICEQUIPMRNP,AIRBORNE,GSNERALSPECIFICATIONFOR This specificationis approvedfor use by all Departmentsand Agenciesof the Depart- ment of Defense. 1. SCOPE ,. 1.1 &9J2z. This specification covers the general re- quirements for airborne electronic eauipment for operation primarily in piloted aircraft. The detail perfo=suce and tes~ requirementsfor a particularequipmentshallbe as specifiedin the detail specificationfor that equipment. 1.2 Classification. The electronic equipment for which the general requirementsfor design and manufactureare.outlinedshallbe of the followingclasses,as specified(see6.2): class 1 - Equipmentdesignedfor 50,000 ft. altitude and contiguoussea level operationover the temperaturerange of -54° to +55°C (+71°Cintermittentoperation). Claas 1A - Equipmentdesignedfor 30,000 ft. altitude and continuoussea level operationover the temperaturerange of -548 to +55°C (+71°Cintermittentoperstioii) . Clsss lB - EauiDmentdesimed for 15,000 ft. altitude ,. ..,, .,, ., . . . and continuoussea level operationover”’ the temperaturerange of -40° to +55°C (+71°Cintermittentoperation). Beneficial cements (recommendations,additions,deletions)and anY pertinent data which ❑ ay be of use in imp.roviugthisdocnmentshould be addressed to Con&nding Officer, Naval Air Engineering Center, Engineering Specifications and Standards Depar~ent (COde.931!)! Lakehurat, NJ 0s733 by using the self-addressedStandardlzatlOn Document ImprovementProposal (DD Form 1426)appearingat the end of this documentor by letter. FSC GDRQ
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MIL-E-5400T - General Spec for Airborne Electronic Equipment
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This specificationis approvedfor use byall Departmentsand Agenciesof the Depart-ment of Defense.
1. SCOPE
,. 1.1 &9J2z. This specification covers the general re-quirements for airborne electronic eauipment for operation primarily inpiloted aircraft. The detail perfo=suce and tes~ requirementsfor aparticularequipmentshallbe as specifiedin the detail specificationforthat equipment.
1.2 Classification. The electronic equipment for whichthe general requirementsfor design and manufactureare.outlinedshallbeof the followingclasses,as specified(see 6.2):
class 1 - Equipmentdesignedfor 50,000 ft. altitudeand contiguoussea level operationoverthe temperaturerange of -54° to +55°C(+71°Cintermittentoperation).
Claas 1A - Equipmentdesignedfor 30,000 ft. altitudeand continuoussea level operationoverthe temperaturerange of -548 to +55°C(+71°Cintermittentoperstioii).
Clsss lB - EauiDmentdesimed for 15,000 ft. altitude
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.and continuoussea level operationover”’the temperaturerange of -40° to +55°C(+71°Cintermittentoperation).
Beneficial cements (recommendations,additions,deletions)and anYpertinent data which ❑ay be of use in imp.roviugthis docnmentshouldbe addressed to Con&nding Officer, Naval Air Engineering Center,Engineering Specifications and Standards Depar~ent (COde .931!)!Lakehurat, NJ 0s733 by using the self-addressedStandardlzatlOnDocument ImprovementProposal (DD Form 1426)appearingat the end ofthis documentor by letter.
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class2 - Equipmeutdesignedfor 70,000ft.altitudeaud continuoussea leveloperationoverthe temperaturerange of -54” to +71”c(+95°Cintermittentoperation).
class3 - Equipmeutdesignedfor 100,000ft. alti-tude and continuoussea level operationover the temperaturerauge of -54” to+95°C (+125°Cintermittentoperation).
class4 - Equipmentdesiguedfor 100,000ft. alti-tude and continuoussea leveloperationover the temperaturerauge of -54” to+125°C (+150°Cintermittentoperation).
1.2.1 Externalcooling. The addition of the letter ‘lX1’after the clasa number, e.g. (Clasa2X), will identifythe equipmeutasoperatiugin the ambientenvironmentof that class,but requiringcooling,froma sourceexternalto the equipment.
2. APPLICABLEDOCUMSNTS,..
* 2.1 Issuesof do&unents. The documeutalistedin Appendix “!A of the issuein effecton the date of invitationfor bida or requestfor.:proposala,form a psrt of this specificationto the extent specified‘herein.Requirementsof MIL-STD-454 invoked by this specificationarelimitedto thosedocm,entsappearingin AppendixA.
DOCUMENTS I
See AppendixA
(Copiesof specifications,standards,drawings,and publicationsre-:quired by contractorsin confectionwith apecific procurementfwnctiona.shouldbe obtsinedfrom the procuringactivityor aa directedby the con-tractingofficer.)
3. R2QUIRRMSNTS
* 3!1 Parts,materialsand processes. Parts,materials,andprocesses shall conform to applicable documents listed in Appemdix A.
* 3.1.1 Selectionof parts and materials. Partsand materialscoveredby documentslisted in AppendixA are standardand shall.be usedwhenever they ire suitablefor the purpose..Partsand materialashallbeprocuredfrom QPL sourceswhen qualificationis a requirementof the part
,. or materialapecification. Nonstandardparta and materialsmust be equiv- ~~alent to or better than similarstandardpsrts and materials. Parts se- ‘lection aud controlshallbe in accordancewith MIL-STD-454,Requirement
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22. ‘~When AppendixA failsto pr&ide an applicablematerialspecificationor standard,the contractorshall use other.establishedspecificationsorstandardsin the order of precedenceset forthin f’fIL-STD-143. Materialaselectedfrom otierthanAppendixA are not standard,and approvalmust.beobtainedprior to theiruse in equipment. Each vendor sourcefor a non-standard‘partor material,requiresapproval.
3.1.1.1 &roval of nonstandardpartsand.❑aterials. In con-sideringthe approvalof nonsumdard parts and.materials,,contractsforelectronicequipmentare dividedinto the folIotvingcategor~es:
CategoryI:
Category11:
CategoryIII:
Contractswhich are fundamentallyforthe purpose of investigationor studyand.not for the fabricationof equipment.
Contracts for one or more models of.equipmentdesignedto meet the perfor-mance requirementsof a specificationorto establishtechnicalrequirementsforproduction equipment. This categoryincludescontractsfor modelsto be“usedfor-test under setiice conditionsforthe evaluationof theirsuitability“andperformance.
Contractsforproductionequipment. Thesecontractawill usnillyincluderequire-ments for a prototypeor prepr?ductionmodel:
3:1.1.1.1 ContractsunderCategory1. Approval of nonstandardparts and materialsshallnot be requiredundercontractsor orderswhichfallnuder Category1.
* 3.1.1.1.2 Contractsfor equipment.whichfallunderCategoriesIIand III. A requestfor the approvalof the use of nonstandardpartsandm-is’, except‘formetals,shallbe”submittedin accordancewith appli-cable paragraphsherein. For a single contractcoveringlike”equipmentswhich fall in both “Categories11 and 111, parts and materials‘approvalshallbe requiredonly for thoseitemsused in Category.11equipments,andany new item sourcesor new nonstandardit”ms”used in CategoryIII equipments.Approvalof all nonstandardparts and materialsused in the equipmentshallbe obtainedby the contractor’.prior to deliveryof any equipmentrequiredby the contract.
* 3.1.1.1.3” Reorderedp~oductionequipment. A designreviewdirectedtoward replacementof nonstandard.parts and materialswith standardPartsand materials shall be .pe~fo~ed on contractsfor reorderedequipment,whetherreorderedfrom the origiualcontractor’or froma differentcontractor.
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Changesmust conformto interchangeabilityrequirements.The originalpartprocuredfrom the same source,when requiredby interchangeabilityor lackof a standardreplacementpart,may be used withoutreapproval.
3.1.1.1.3.1 Continuationof production. In thosecaseswhereinthereorderedproductionequipmentrepresentscontinuousproductionby the samecontractor,a review directedtoward nonstandardparts replacementwithstandardparta shallnot be required.
3,1.1.1.4 Time scheduleof msterialapprovalrequests. Therequest for approvaiof nonstandardmaterialsshall be made at the .tirs~that the material ia selectedfor uae in the equipment, The Governmentretains the right to requestchangesto the material,if the performsnce,description,teat data, or inspectionof the materialindicatesthat thematerialwill not performita intendedfunction,
3.1,1.1.5 Samplesrequiredfor partsand materialapprovals.Sampleaof nonstandardpartaand materi.alamay be requiredby the procuringactivity.These samplesshallbe submittedin quantitiesand to the destina-tion apecified by the procuringactivityfor testsand examination, Samplequantitiesto be specifiedwill not exceed 1 ounce or 6 squareinchesofany materislor 3 feet of wire or 3 units of any otherpart, excepttransform- ;ers, microcircuits,delaylines,blowers,and power tubessuch aa magnetrons .and klystrons,where1 unit is aufficient. Sampleparts and materialsmaybe testedto destructionby the procuringactivityand will not be returnedto the contractor,When there ia more than one supplierfor a part orinaterial,parta or materialafrom each suppliershallbe consideredforseparatesubmission.
3.1.1.2 Uae of militarypart identifiers.Partswhich requireQPL approval,but whichhave no qualifiedvendors,shallnot be identifiedwith militarypart numbers.
3.1.1.3 Choiceof parts and materials. Wheneveran applicablespecificationprovidea❑ore than one characteristicor tolerancefor anitem, the equipmentmanufacturershall use in the equipment,items ofbroadestcharacteristicsand of the grestestallowabletolerance thatwillfulfill the performancerequirementsof the equipment. When acceptableitamaof higherthanmiuinnuaqualityare readilyavailable,the utilizationof which wouldnot increasethe initialor life cyclecoat to tbe procnringactivity,they may be used. When ❑aximumphysicaldimensionsof an‘itemare indicatedin the applicablespecificationfor the item,all new equipmentshall be designedto accommodatethe maximumphysicalsize specifiedinorder that all parts having the same type designationwill be physicallyinterchangeablein the equipmeut.
3.1.1.4 Replaceabilityby standardparts and materiala. When- .everpermissionis grantedby the procuringactivityfor a contractorto useitems not in accordancewith standardspecificationsfor which approved
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because of nonavailabilityof standard items, the;ontractorsha~l arr~ngethe equipmentto permitreplacementin the fieldof the nonstandardby the standarditems. The standard item shall belistedin the technicalmanualsas the preferredreplacement.
3.1.1.5 Equipmentperformance. The requirementsof this speci-ficationwith regardto the use of parts,materials,and procesae$,eitherstandardor approvednonstandard,shall not relievethe contractorof theresponsibilityfor complyingwith all equipmentperformanceand otherre-quirementsset forth in the detail equipmentspecification,or contract.Approvalsfor nonstandardparts and materialsare contingent.on Subsequentsatisfactoryperformanceduringpreproductionand qualityconformancetestsand other requiredequipmenttests.
3.1.1.6 Substitutionof parts. The selectionand applicationof substituteparts shall be h accordancewith MIL-STD-454,Requirement72.
3.1.2 Capacitors: Capacitorsshall be in accordancewithHIL-STD-454,Requirement2.
3,1.3 Metal castings. Metal castingsshallbe in accordancewith MIL-STD-454,Requirement21.
>3.1.4.1 Mountingof electricreceptacles. Where practical,
when receptaclesare mounted.on a verticalsurfacethe largestpolarizing.or prime key or keywayof the receptacleshallbe at the top centerof theshell of the receptacle.
3.,1.4.2 Adjscent locations. The use of identicalconnectorsinadjscent locationsshall be avoided. When the:use of comectors of thesame shell size.in adjscent locationscannotbe avoided,differencesinkeyingarrangementshallbe used to preventmismating.
3.1.5 Controls Controlsshall be in accordancewith MIL-STD-454,Requirement~”
3.1.5.1 Deleted.—.
3.1.5.2 Tuningdials. ~uningdialskhaIlbe in accordancewithMIL-STD-454;Requirement42.
3.1.5.3 Controlpanels. Controlpanels.shallconformto MIL-C-6781. The design shall be approvedby the procuringactivityprior tofabdication.“Thisdesign approval’appliesto panel layontonly and doesnot authorizeuse of nonstandardparts on the panel.
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3.1,!5.4 Ranges of adjustablecomponents. The electroniccir-cuitry shallbe designedto providea reservein the adjustmentrange fromthe nozmal adjustmentsetting of all variable componentsthat requireadjustmentduringoperationor maintenance. This adjustmentrange shallbesufficientto compensatefor compositevariationswhich may developiu theassocistedcircuitrybecsuse of normal changes in part values during tieapecified life cycleof the equipment. The adjustmentrangeshall alsobecapable of compensatingfor variationsresulting”from replacementwithparts within the tolerance apecified.
3.1.6 Corrosionresistance. Materialashallbe of corrosion-resistanttypesor shallbe processedto resistcorrosion.
3.1.6.2 Ferrousalloys. Ferrousalloys shallhe in accordancewith MIL-STD-454,Requirement15,
3.1.6.3 Aluminumalloy.
3.1.6.3.1 Surface,general. Parts fabricatedfrom aluminum1100,alloya 3003, 5052, 6053, 6061, 6063, or 7072 shall be cleanedwith a de-oxidizingsolution,otherthan an uninhibitedcausticdip, aod may be usedwith or withontother surfacetreatment. Other aluminumalloys shall beanodizedin accordancewith MIL-A-S625or be given a chemical.treatmentinaccordancewith MIL-C-5541.
3.1.6.3.2 Surfaces,bondedand grounded. Wherebondingor ground-ing ia neccsaary,aluminum1100,alloys3003,5052, 6053,6061,6063, 7072,or equally corrosion-resistantalloys, shall be used. They may be usedwithoutother snrface treatment.
3.1,6,3.3 Aluminumsurfaces,extremewear resistant. Wherebonding or groundingia not necessacy,hard anodic finiaheaconformingtonumbersE514, E515, or E516 of MIL-F-14072may be appliedto obtainextremewear-rasiatantsurfaceaunder Type II (MIL-F-14072)erposure on desiredareas of aluminumalloys not aubject to repeatedhigh tensilestresses.
* 3.1.6.4 Cadmium-plating.Cadmiumplatingshallbe in accordancewith MIL-STD-454,Requirement15,
3.1,6.5 Magneaiumand ma~neaiumalloya. Magnesiumand magnesiumalloysshallnot be used exceptwhen approvedor specifiedby the procuringactivity. The requestfor use of magneaiumand ita alloysshouldincludethe total environmentespoaure,the weight reductionand Otheradvantagesachieved, the proposed surface treatment,and the applicationdetaila.
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3.1.6.6 Zinc and zinc-platedparts. Zinc and zinc-platedpartsshallbe givena bichromatetreatmentin accordancewith QQ-Z-325,Type II,class 2.
3.1.7 Dissimilarmetals. Selectionand protectionof dissimilarmetal combinationsshallbe in accordancewith llIL-STD-454,Requirement16.
3.1.8 Finishes. Unless containedin a hermetically“seale”dunit, part finishes~ing hardwareitemsof equipmentnot coveiedbysubsidiaryspec’ifications),shallbe resistantto corrosion. Finishesshallbe capableof withstandinga 48”hour Salt Spray (Fog)test in accordancewith ASTM B-117 withoutshowingsignsof corrosionbeyondthoseestablishedfor the particularpart, material,or finishspecification.Whereappli-cable, these parts shall have finishesprovidingsnitablerates of heattransfer. Parts which are lubricatedin equipmentmay be tested in alubricatedcondition. Lusterlessfinishesshallbe ‘usedon all surfacesvisible to operatingperson.uel.Where cleaningoperationson metslpartsare not specifiedin detail,they shall.be in accordancewith MIL-S-5002.It is not the intentthat parts procuredto the specificationslistedinAppendixA must be refinished.
3.1.8.1 Casesand frontpanels. Equipment installed in thecockpitarea shallbe LusterlessBlack,.Color‘No.37038 in accordancewithFED-STD-595. Finishof all otherequipmentshallbe LusterlessGrayColorNo. 36231,in accordancewith FED-8TD-.595.
3.1.8.2 .Fastenersand assimblyscrews. Exposed surfaces ofexternalfastenersand assemblyscrewsused in areasotherthan the cockpitwhich are manipulated,loosened,or removedin the normal processesofservicingand installingthe equipmentshallbe finished,preferablyin anoncorrosiveblack or brightfinish,,so as to providestrongcOntraStwiththe color of the surfaceupon which they appear. Exposedsurfacesof ex-ternalfastenersand assemblyscrews“usedin the aircraftcockpitshrillbefinishedin accordancewith 3.1.g.1. Otherexternalfastenersand assemblySCGWS used for securingthe’internalparts,to the chassisshallbe SiMilarin colorto the surfaceupon which they appear.
3.1.8.3 Otherstandardfinishes. Type I finishesin accordancewith MIL-F-14072are approvedas alternatesto any differingrequirementsspecifiedunder the paragraphs.on finishes,except thnt colorsspecifiedshallbe used. . .....
3.1.9 Groundin&. Grounding’shallbe in accordancewithMIL-STD-454,Requirement1...
3.1.10 Fastenerhardware. Zasteriertia:dwareand tecbuiques ,.shallbe in accordancewith MIL-STD-454;Requirement12.-
3.1.12 Fuses, fuse holders,and associatedhardware. Fuses,fuse holders,and associatedhardwareshallbe in accordancewith MIL-STD-454, Requirement39, The insulatingcap of a non-indicatingfuse postshall have a hole 0.078*O.002 inch in diameterand a maximumdepthof 7/16inch for contactwith the metallic frame holdingone end of the fuse topermit the insertionof a test prod. The fuse shall be wired so thatvoltage appearingat the test point will indicatethat the fuse ia good,
3.1.13 Insulators,insulating,and dielectricmateriala. In-sulators,insulating,and dielectricmaterialsshallbe in accordancewithMIL-STD-454,Requirement11,
3.1.14 Arc-resistantmaterials, Arc-reaiatantmaterialsshallbe in accordancewith MIL-STD-454,Requirement26.
3.1.15 Jacks. Microphonejacks shall be type M641/5-l andHeadaetjacka shall~~e M641/6-lconformingto MIL-J-641, Use of thesejacka for other thsn microphone and hesdaet nse ia prohibitedin areasaccessibleto flightpersonnel.
3.1.16 HI. Items shallbe ❑arkedin accordancewith MIL-STD-454, Requirement67. Msrking shall not adverselyaffect the leakagepath between condnctoraor any other factor of equipmentperformance.
3.1.16.1 Engineeringdesignchan~ea. To identifyproperly,de-viationsin articleaof equipmentresultingfrom engineeringchangeproposalspreparedby tbe contractorand approvedby the procuringactivity,markingOf one of the followingcategoriesshallbe aasignedfor use on each majoror minor assemblyin which the changehaa been incorporated:
a. A changein the type designationof the articleaaincludedin a nameplateor other❑arking.
b. The uae of a modificationsymbol imprintedoraffixed adjscent to but never on or to the rightof the nameplate. A seriesof ❑edificationsymbolsshall be used for successiveminor engineeringchangeanot justifyinga changein type’designation.
3.1.16.2 _Labels. Labela showingwiringand schematicdiagrama,of parta, lubricatingand operatinginstructions,safetynotices,list oftools, list o! contents,snd similar informationshall be providedwherespacepermits, LabelsahalIbe designedto remainlegibleand affixedforthe servicelife of the equipmenton which they are mounted,
* 3.1,16.3 Wire coding. Wires used for internalwiring shallbecoded in accordancewith MIL-STD-454,Requirement20. Flat cable conductorsmay be identifiedat terminationpoints. Hot or cold stampingshall be
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allowed only on insulatedwire which will not accept ink. Markingshallnot be used on wireswhere the dielectriccapabilityof the wire is reducedby such ❑arking. Wire used,for externalwiring between units shallbecodedin accordancewith MIL-W-5088(see3.1.34).
3.1.17 Meters (electricalindicatin~and accessories).Metersshall be in accordancewith MIL-STU-454,Requirement.51. Externalmetershunts shall be in accordancewith MIL-STD-454,Requirement40. Metersother than those in accordancewith MIL-M-10304,coIor’schemesW, B, Y, Fand P, requireprocuringactivityapproval.
* 3.1.18 -.’ Relays shall be in accordancewith MIL-STU-454,Requirement57. Relaysother thanhermeticallysealedtypesshallnotbe used. The selectionand applicationof teedrelaysrequiresprocuringactivityapproval.
3.1:19 Resistors. Resistorsshallbe in accordance“withMIL-STD-454,Requirement33.
3.1.19.1 Tappedresistors. The use of fixedand variableresist- .,.’ors havingfixedtaps,requiresprocuringactivity.approval.
3.1.20 Soldering. Solderingshallbe in accordancewith MIL-STD-454,Requirement5.
3.1.20.1 Mechanicalassemblies. Unlessspecificallyapprovedbythe procuringactivity,no assembly‘shalldependsolelyon soft solderformechanicalstrength,exceptfor variablecapacitorplates and sectionsandother relativelylight parts that are in acceptedcommercialdesign andthat have,by actualuse, provedto be generallysuitablefor use in elec-tronicequipment.
3.1.21 Springs. Springsshallbe in accordancewithMIL-STD-454,Requirement41:
* 3.1.22 Switches. Switchesshall be in accordancewith MIL-—STD-454,Requirement58.
3.1.22.1 Rotaryswitches.
3.1.22.1.1 Indexingmechanism. Rotary switches shall have apositivemechanicalindex,locatingeach contactposition. When operatednormally,the switch indexingmechanismshallpreventthe ❑ovablecontactfrom comingto resE,betweencontactpositions.
,. 3.1.22.1.2 Materials. Materials used in the constructionofrotaryswitchesshallbe as follows:.
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a. Contactsshall be silver alloy or silverplated,and shallbe self-cleaning.Contactsusing othermetala are aubject to approvalof the procuringactivity.
b. Shafts shall be aluminum or corrosion-resistant❑aterial.
c. Metalparts,otherthan contsctsand shafts,shallbe made of corrosion-reaiatant material,exceptthat bushing and bearing assembliesmay be brasssuitablytreatedto preventcorrosion.
* 3.1.22.1.3 Mounting. Rotary switcheswith thru-panelshaftsshallbe designedfor mountingto the panelby means of a singlethreadedbushingconcentricwith the shaft. A positivemechanicalmeans, in additiontolock washers, shall be providedto prevent rotationof the switchbody.
3.1.22.2 Toggleswitches. The mouutingof toggleswitchesshallbe such thAt the handle of the switchoperatesin a verticaldirection.The “off”positionshallbe in the centerpositionon three-positionswitches “and in the bottompositionon two-positionswitches. When clarificationofa controlfunctionor convenienceof operationwould result (forexample,aInleft-righl?lfunctioncontrol),toggleswitchesmay be so mountedthat thehandleof the switchoperatesin a horizontaldirection.
3.1.23 Terminala. Terminalashallbe in accordancewith MIL-STD-454,Requirement19.
3.1.24 Deleted.
3.1.25 Tools (special). Specialtools shallbe in accordancewith MIL-STD-454,Requirement63.
3.1.26 Setscrewwrenches. Oue wrench for each sizeand typesetscrewhead employedfor operationaladjustmentsshallbe securelymountedwithin the equipmentin a readilyaccessiblelocation. Each wrenchshallbe processedto resistcorrosion.
3.1.27 Deleted.
* 3.1.28 Transformersand inductors. Transformer and inductorsshallbe in accordancewith MIL-STD-454,.Requirement14.
3.1.29.2 Electrontubes. Electrontubesshallbe in accordancewith MIL-STD-454,Requirement29.
3.1.30 Deleted:
3.”1.31 Structuralwelding. Structuralwelding shall be inaccordancewith MIL-STD-454~ Requirement13.
3.1.32 Wire (hookup). Hookupwire shallbe in accordancewithMIL-sTD-454,Requirement20.
ante2i3&D45?~: .Intern@ wiling shallbe in acccird-
3.1.33.1 Printedwiring. Printedwiring shallbe in accordancewith MIL-sTD-454,Requirement.17.” PrintedwiringbOards shallbe cOmecCedinto the equipmentby ❑eans of comectors. ‘Printedwiringboardsutilizingthe conductorpatternas the directcontactwith the mating cotiectorshallnot be used.
3.1.3f4 Wiring (extirnal).Provisionsshallbe made for externalwiring in accordancewith MIL-STD-454,Requirement71, and MIL-W-5088asapplicable.
3.1.35 Deleted.
3.1.36”’ tficroelectronicdevices. H<croelectronic devices,includinghybrids,shallbe in accordancewith llI&STD-454,Requirement64.Devicesselectedshallbe solderedor weldedinto the circuit”.
3.1.37 Part% to”meet reliabilityrequirements. When thecontractor equipmentspecificationincludesa reliabilityrequirementthatis based on a previous calculationand demonstrationof the equipmentreliability,the parts shall.beequal“toor more reliablethanthoseusedin the demonstration.equipment.
3.1.38 Bearings. ‘Bea=ing~a,hallbe in accordancewith MIL-STD-454,Requirement6.
3.1.40 Derating. Deratiigof electronicpa~ts and materials‘shallbe in accordancewith‘MIL-STD-454,Requirementlg.
3.1.41 Adhesives. AdhesivesshaIlbe ~ accordancewith MIL-S2’0-454,Requirqnent23. The use of adhesivesin electrical’applicationsrequiresthe approvalof the procnringactivity.
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3.1.42 Batteries. Batteriesshallbe in accordancewithMIL-STD-454,Requirement27.
* 3.1.51 -Sockets,shields,and clamps. Sockets, shields, andclampsshallbe in accordancewith MIL-STD-454,Requirement60, and requireprocuringactivityapprovalfor use,
3.1.52 Brazing. Brazingshallbe in accordancewith MIL-STD-454, Requirement59,
3.1.53 Organicfibrousmaterial, The use of organicfibrousmaterialshallbe in accordancewith MIL-STD-454,Requirement44.
3.1,54 Coaxialcable (RF). Coaxial cable (RF) shall be inaccordancewith MIL-STD-454,Requirement65.
3$1.55 Multiconductorcable. Multiconductorcable,withintheeqnipmeut,shallbe in accordancewith MIL-STD-&54,Requirement66.
3.1.56 Resdouta. Readouts shall be in accordancewith MIL-STD-454,Requirement68.
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* 3.1.56.1 Digitalreadoutdisplays(LCDand LED types). LiquidCrystalDisplays(LcD)“exhibitlimitedoperatingtemperatureextremesandshoulduot be used. Lightemittingdiode (LSD)displaysshouldnot be usedin cockpitareas or where sunlightmay impingeupon the display. The useof LCD and LED typedisplaysrequiresthe approvalof the procuringactivity.
3.1.51 Electricalfilters. Electricalfilters shall be inaccordancewith MIL-sTD-454,Requirement70.
* 3.1.58 Electroluminescentpanels; The use of electroluminescentpanelsshallrequireapprovalof the procuringactivity.
3.2 Designand construction.
3.2.1 Detailed❑echanicaland electricaldesign. The detailedurachanicaland electricaldesignof the equipmentshallbe accomplishedbythe contractor,subjectto the requirementsof thisapecificationand anyspecificationto whichit is subsidiary.The requirementsof this specifics-tion are detailedonly to the extentconsiderednecessaryto obtainthedesiredmechanicaland electricalcharacteristics,performance,and perma-nence nf the same..The designlayoutand assemblyof the unitsaod theircomponentparts shallbe such as to facilitatequantityproductionand toresultin minimumsize and weight.
3.2.1.1 Mechanizedproduction(includingPriutedcircuits).When designinguew equipment,contractorsshall include,when possible,circuitsthat havebeen or can be reproducedby mechanizedor aemfmech8nizedproductionfacilitiesconsistentwith the stat;of the art. The procuringactivityshallbe kept informedof the typesof circuitsselectedand thetype of facilityto producesuch circuits. The followingfactorsapplicableto this typeof constructionshallgovern.
* 3.2.1.1.fi Approvalrequests. In the constructionof nonrepairablesubassemblies,detailparts need not be submittedfor approval. Approvsland controlshallbe in accordancewith 3.1.1for each individualnonrepairablesubassemblyconsideredas a singlenonstandardpart. The approvalrequest
3.2.1.1.5 In the selectionand layoutof circuits,the contractorshallattemptto use circuitsand methodsof constructionwhichmay permituse of the same subassembliesin other equipmenthnving similarcircuitsand functions.
3.2.1.1.6 Tvpesof construction.The followiugtypesof construc-tion are consideredto be classed in the mechanizedor semimechanizedcategory,and shallbe considered
a. Subassembliesusing printed circuits,upon whichthe parts are printed or mechanicallyplacedandelectricallycounected.
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b. Conatrnctionin which several ceramicor filledplasticwafersare placedone“abovethe otherand,componentsprintedor mouutedthereon.
c. Three-dimensional,or folded-typeconstruction,inwhichthe parts are mechanicallyplacedand elec-tricallyconnected. Cordwaodconstructionshallnot be used for repairableitems. ..
d. Microcircuitsusing depositedor printedtechniques,iucludingcircuitsemployingcombinationsof theseprocessesand discreteparts.
3.2.1.1.7 In order to permit flexibilityin the arrangementorassembly of modules and subassemblies,interconnectingleadsinvolvingcircuits consideredsusceptibleof radiatedinterferenceor capableofradiatinsinterferencesshould be shieldedand of low-impedancedeaisn.All other‘couuections(suchas power)shouldbe well shieldedor bypasaedinternalityto preventradiationor pickupof extraneousfields.
3.2.1.1.8 Welds,r&istance, electricalinterccmnectiona.Elec-trical interconnectionresistancewelds shall be in accordancewith ?lIL-STD-454,Requirement24.
3.2.2 Fabrication. Boxes, cases, shields,and.compartmentwalls shallbe made by casting,drawing,or bendins,and weldingor brazing,except when ease of serviciugof the equipmentrequiresthat a removablepanel constructionbe used,or when the appliedstressesdictatethe use ofa strong aluminumalloy which does not provide a good weld or braze;forsuch parts,rivetingor bolting-maybe used.
3.2.3 Enclosures. Enclosures shall be in accordancewithMIL-STD-454,Requirement55, except that performancefor mountingbasea
,..
14
MIL-E-5400T
shallbe met for the frequenciesand amplitudeshownin the specificcurveof Figure 2, for the applicableequipment. Mountsand vibrationisolators,whetherintegralor not, shallbe subjectto the approvalof the procuringactivity.Positiveself-lockingcase mountingfastenersshallbe used onall mountings. The fastenerchosen shallbe of a size specifiedfor theweightof the equipmentunit.
3.2.4 Accessibility. Accessibilityshall be in accordancewith MIL-STD-454i Requirement36.
3.2.5 Theimaldesign. ‘1’t&maldesignshailbe in accordancewith MIL-STD-454,Requirement52.
* 3.2.5.1 Coolingdesign data. Cooling design data shall bedevelopedas soon ai possible after major circuitparametershave beenestablished. Initially,this data shall includecalculations,drawings,and other informationrelatingto the &.oiceof”a particularcoolingsystemconfiguration.As part of this initialdats,the firstset of applicablethermal.design evaluationdata shsll be developed,based on preliminarycalculationsat the specifiedoperatingconditions. The approvalof.thecoolingsystemwill be based upon’considerationof this information.Ap-plicable part temperaturesfrom these calculatiorisshouldbe utilizedinthe reliabilitypredictionanalyses. As equipmentdevelopmentproceeds,this data shouldbecome more final‘andahonld be based on ‘moreactualthermal test results. Upon completionof the engineeringdevelopmentorprepro,ductionmodels,and when requiredby the contract,a thermalevalua-tion test program”shallbe.conducted.
3.2.6 Coronaand electricalbreakdownprevention. Coronaandelectricalbreakdownpreventionshallbe in accordancewith MIL-STD-454,Requirement”45.
* 3.2.7 Deleted.
3.2.8 Encapsulationand embedment. Encapsulationand ernbedrientshallbe in accordancewith?lIL-STD-’454,Requi.rem~t47.
3.2..9 COnfOrmalcoating. Conformalcoatingshallbe reversionresistant and hydrolyticalIystable and shaIl retain its cured charac-teristics.
3.2.10 Lubrication. I,ubricati6nshallbe in accordancewithMIL-STD-454,Requirement43.
magneticinterferencecontrolshallbe in accordancewith 141L-STD-454,Re-quirement61.
3.2.12 Anti-januning.The electronicsystemor.equipmentshallbe designed to obtain the’maxiiuuninherentprotectionagainstpossible
.
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MIL-E-5400T
interferingsignalscausedby enemy jamming. The coritractorshallsolicitand obtain the approvalof the procuring activityfor the basic anti-jammingconceptsbeforeproceedingwith the designof the models.
3.2.13 Maintainability.Maintainabilityshallbe in accordancewith MIL-STD-454,Requirement54.”
3.2.14 Reliability. Reliabilityshall be in accordancewithMIL-STD-454,Requirement35.
3.2.15 Test points,test facilities,and teat equipment. Testpoints, test facilities,and test equipmentshallbe in accordancewithMIL-STO-454,Requirement32,
3.2.15.1 Operationalcheckoutprovisions. The equipmentshallbe designedto providefor connectionsat its face for such test equipmenta8 may be requiredfor operationalcheckouttests. The equipmentshallbedesigned.in suchmanneras to permit use of itemsof standardserviceteatequipmentto accomplishall necessarytesta. The latestavailablelistof,standardservicetest equipmentshall be obtainedby the contractorfrom ::?.~‘:the procuringactivity. If .apecialteat equipmentis required,the procuring .,,.~,:activityshallbe suppliedwith recommendationtherefor,
‘3.2.16 Microphonics. Microphonicseffectsshallnot be detri-mentalto equipmentperformance,
3.2.19 Orientation. Normal installationpositionor rangeofpositions”shallbe as apecified iu the detailequipmentapecification. Theequipmentshall operatewithin specifiedlimitsin any position..specifiedin the detailequipmentspecification.
9.2.20 Electricaloverloadprotection. Electrical overloadprotectionshallbe in accordancewith MIL-STD-454,Requirement8.
3.2.21 Presaurization.Wheneverpressurizationof the electronicequipmentis required,or ia utilized to meet the requiremeutaof thisspecification,the followingprovisionsshallbe met:
* a, The case shallwithstanda positiveor negative5paipreaaure differenceover the applicableprea- .:::”‘,’sure range. :..,.
16
MIL-E-5400T
b,
c.
d.
e.
f.
The caseshallbe of a type thatwill permit readyopeningand clearingfor access to the equipmentfor repair“andmaintenance. If practicable,theequipmentshall be completelyoperableafterre-❑oval from the case, and alignmentshall be un-affectedby replacementin the case.
When possible and advantageous,externalpointsshallbe providedfor Check withoutremovalfrom.the caae,
A means shall be provided for determiningtheeffactivenessof the seal. This may consistof anautomobile-tire-typevalve stem fittingto permitthe use ‘ofan air pump for increasingthe pressureapproximately5 pai abOve sea level.pressure.Measurementof the pressureby means of a Schradertype 3715gage,or equivalent,shallbe possible.
,.. ..:,Sealinginstructionsshall be placed on one sideof the caae,if practicable.
Thosepartaof an equipment,includingtransmissionlines, that are pressurizedshallbe capableofwithstandingany pressures developedunder therequired external operation conditions, afterhavingbeenpressurizedinitiallyon the groundtonot more than 5.psi gage at -20° to +50”C, tosuch,an extent that no arcing or 10SE of powercaused by coronaoccurs that would not occur atatmosphericpressure on the ground. Nor shallleakage be snch as to permit the entrance ofmoistureor air to an extentthat permanentdamageor impaired operationoccurs under’any of therequired operating conditions. Vacnum reliefvalvesshallbe provided.
Unlessspecifiedor permittedin the detailspeci-fication,pressureshallbe maintainedwithouttheuse or need of a pressurizationPUMP. When apressurizationpm” is required,redundantbs?ostaticswitches,or similar automaticmeans, shsll beprovidedto assureequipmentis,pressurizedduringflight,even thoughit is“notbeingoperated. Theswitchor automaticmeans shallbe energizedfroma commonpoint and shallbe energizedas part ofthe take-off procedure.
17’...
MIL-E-5400T
h. The equipmentshallmaintainpressureto accommodatethe maximumoperatingtime;in addition,and whereapplicablefor captive and nonoperatingflight,the equipment shall maintain operatingpressurefor periods up to 24 hours. Unless otherwisedeterminedas sstiafactory,the loss of pressureshall not exceed 5 poun$a in a 24-hourperiodatthe altitude and temperaturespecified in thedetail specification.
i. If required,a desiccantshallbe providedwitbinthe case.
j. Parts used in pressurizedcontainershallmeet therequirementsof.this specification,except thatthe altituderequirementsmay cliffer.
3.2.22 Ssfety (personnelhazard). Provisions for persomelsafetyshallbe in accordancewith MIt,-Sl’D-454,Requirement1. ,...
3.2.22.1 Safetyprogram. A safetyprogram shallbe established ~;“.’”.by the contractorif requiredibythe detailequipment specificationor con-tract. Safetyprogramashall conformto llIL-sTD-882(ace6.2).
* ‘3.2.23 Serviceconditions(electrical). The equipmentshallbe designed to operstefrompower sourceswith characteristicsconformingto MIL-STD-454,Requirement25.
3.2.23.1 Warmuptime. Warmup time shall be such as to providethe specifiedperformancewithin a periodas specifiedby the detailequip-ment specification.Unlessotherwisespecified,the warmuptime at tempera-tures down to -54°C shall not exceed2 minutesfor equipmentessentialtoflight safety,and shall not exceed5 minutesfor equipmentnot essentialto flightsafety,
3.2.24 Serviceconditions(environmental). The equipmentshall be so designedand constructedthat no fixedpart or assemblyshallbecome loose,no moving or movablepart or controlbe shiftedin setting,position,or adjuatment,and no degradationbe caused in the performancebeyond that specifiedin the individualspecificationfor the particularequipmentdurinsoperationor after storagein ambientconditionsas follows.
;3.2.24,1 .Temperature. The equipmentshall be exposed to thetemperatureconditions,for the applicableclass, ahown in Table 1. The ~,,. Iambienttemperaturewithinthe specifiedtemperaturerangeamay remaincon- ;’ :‘“’
,., ,, stant for long perioda and may vary at a rate aa high aa 1 degreeper,. second,
18
klIL-E-5400T
,3.2.24.1.1 “Op~r~ting. The equipment.shalloperateunderthe con-ditionsfor the applicable.class,“and withinthe rangeslistedin column1,II, 111 and VII of Table I.
3.2.24.2 Altitude. The equipmentshallmeet the altitudecondi-tions,for the applicable.cIass,listedin COlumnVIII Of Table I~ bOth fOrcontinuousoperationand exposurein a nonoperatingcondition,.The sltitudemay remainconstantfor longperiodsand vary.at a rate as high as 0.5 inchof mercuryper second.
3.2.24.4 Humidity. T@ equipmentshallwiths~nd the effectsOfhumiditiesup to 100 percent, includingconditionswherein condensationtakes place in and on tie equfPIIIent.The equipmentshall withstandtheabove“conditionsduringoperatingand nonoperatingconditions. Foggingonthe insideof the cover“glassof instrumentsshailnot occur.
3.2.24.5 Vibration.
3.2.24.5.1 Equipmentnotmallymounted. When normally”inouuted(withvibrationisolatorsin plice, if any),tie equ{PmentshallnOt”sufferdamage or fail.to meet specifi@ perfoimincewherisnbjected tO the appli-cable‘vibrationenvironmentdetailedherein or as specifiedin the.detaileqnipmentspe.cificat”ionor cOntr.act.Selectionof the applicablevibrationenvironment’(typeof eicitatiori,frequeneyrange,and amplitudeas a functionof aircraft.and applicationlocation)”shill.be determinedusingthe follow-
,ing.criteria:
3.2.24.5.1.1 Equipmeut.designed for iristallationin“propelleraircraft.Equipmentof this type shallwithstandsinus.o.idal’~xcitatienOver the fr@-quency range of 5 to 500 Hz with amplitudespecifiedby the appropriatecurveof Figure2.
3.2.24.5.1.2 Equipmentdesignedfor installationin jet aircraft.Equipmentof this type shall withstsndeither rindOm,sinu60idal,.Or, fipartitinlirapplications,both randomand sinnsoidnlexcitationas indicated
.,. below.
!. a. Randomexcitation- The vibrat!OnsPectr~ shallextend-from 15 to.2000 HZ~.with tie ~1.itudespecifiedin the detailefiequiPrnCmtsPecificatiODor contract. W&re -.atitnalmeasureddata ia not
19.’.:
.
,.
b.
c,
MIL-E-5400T
av.nilableto estzblishrandom requirements,themathematicalformnlaecontainedin MIL-STD-81Omaybe used to calculateapplicableamplitudeswhenspecificallypermittedby the detail equipmentspecificationor contract.
Sinusoidalexcitation- Sinusoidalvibrationcover-ing the frequencyrange of 5 to 2000 Hz withthe amplitudespecifiedby the appropriatecurveof Figure 2 shallbe used when randomvibrationrequirementsare not specified in the detailequipmentspecificationor contract.
Randomand sinusoidalexcitation- In particular‘applications,both randomand sinusoidalexcita-tions may be requiredto simulate.the in-serviceuse of the equipment, The detailequipmentspec-ificationor contractwill specifysuch require-ments.
Equipmentof this type shallwithstandsinusoidalexcitationover frequencyrangeof 5 to 2000Hz with the amplitudespecifiedby CurveIIIb of Figure2.
3.2.24.5.2 Equipmentwith isolatorsremoved. Equipmentmormallymountadon isolatorashallnot suffer.@mage or fail to meet-apecifiedper-formancewith isolatorsremoved when subjectedto sinusoidalvibrationwithinthe frequencyrangeand amplitudespecifiedby the applicable.curveof l?igure2. For equipmentdesignfor propelleraircraft,CurveII shallbe used; for jet aircraft,Curve IIa shallbe nsed; and for helicopters,
S.2.24.6.2 ~, With excursionstopsorbumpersin place and with maximumrated load appliedin a normalmanuer,themounting base, individualisolatora,or otherattachingdevicesshallwithstandat least 12 impact shocks of 30g, consistingof 2 shOck:a$oPPOaite directionsalong each of 3 mutuallyperpendicularaxes.shock impulse.shall have time durationof 11 31 ❑illiseconds. The ‘)g”valueshellbe withinHO percentwhenmeaauredwith a 0.2 to 250 Hz filter,
. .,.
. “
20
MIL-E-5400T
and ❑aximum “g” shaIl occur at approximately5-1/2milliseconds.Bendingand distortionshallbe permitted;however,there shallbe no fsiluretothe attachingjointsand the equipmentor dmwnyload shallremainin place.
3.2.24.6.3 Benchhandling. The equipment shall withstand theshockenvironmentencounteredduringservicing.
3.2.24.7 Sand and dust. The equipmentshallwithstsnd,in bothan operatingand nonoperatingcondition,exposureto sandand dnstparticlesas encounteredin operationalareasof the world.
3.2.24.8 w. The equipmentshall withstand,.in both anoperatingand nonoper~tingcondition,exposureto fuugusgrowthas encounteredin tropicalclimstes. In no case shilloverallsprayingOf the.equiPmentbe necessaryto meet this requirement(see3.1.11).
3.2.24.9 Salt atmosphere. The equipmentshall withstand,inboth an operatiagand nonoperatingcondition,exposureto salt-seaatmosphere.
3.2.24.10 Explosiveconditions. ‘f’heequipmentshall not causeignitionof an ambient-explosive-gaseousmixturewith air whereoperating@suchan atmosphere.
3.2.25 Humanengineering. Human engineering shsll be inaccordancewith f41L-STD-454,Requirement62.
3.3 Interchangeability.Interchangeabilityshsllexistbe-tween all units and replaceable.a8semblies;subassemblies,’ind Parts forall equipmentdeliveredon the contractin accordancewith MIL.-STD-454,Requirement7. ,,
3.3.1 Interchangeabilityof feorderedequipment. For reorderedequipment,interchangeabilityshallexistbetweenunitsand all replaceableassemblies,subassemblies,and psrtsof a designatedmodelof anypreviouslymanufacturedequipmentsuppliedor designatedby the procuringactivity.Such interchangeabilityshall be measuredagainstthe designatedmodel,manufacturingdrawings,or other technicalinformationprovidedfor thepurpose.In the eventthe contractor orderdoesnot stipulatewhetherthemodel, drawings,or other informationahsll govern,the designatedmOdelshallbe used,
3.3.2 Interch.sngeabilityconflicts. Should any conflictsarisebetweenany of the requirementsof this specificationor the detailspecificationand the requirementfor interchangeability,the contractorshould”immediatelyinformthe-pro5tiringservice.ofsuch conflict.Unlessadvisedotherwise,the interchangeabilityrequirementshsll%Overn.
* 3.4 Nomenclatureassignment.Nomenclatureassignmentshallbe in accordancewith UIL-STD-454,Requirement34, alongwithHIL-N-1S307for the Navy,MIL-N-7513for thi Air Force,snd the contractfor theArmy.
shallbe in accordancewith I4.1 Responsibilityfor inspection. UnlessOtherwisespeci-
fied in the contractor purchaseorder,the supplieris responsiblefor theperformanceof all inspectionrequirementsas specifiedherein. ExceptaSotherwisespecifiedin the contractor order,the suppliermay use his ownor any otherfacilitiessnitsblefor the performanceof the inspectionre-quirementsspecifiedherein, unless disapprovedby the Government. TheGovernmentreservesthe right to performany of the inspectionsset forthin the specificationwhere such inspectionsare deemednecessaryto sssuresuppliesand servicesconformto prescribedrequirements.
First srticle(preproduition)tests.(prep~~~uction)testsshallbe performedon one (
First articlemore than one if required
by the detsilspecificationor by contract)‘equipmentrepresentativeof theequipmentto be suppliednnder the contract. Tests shallbe performedinaccordancewith the approvedtestproceduresof 4.5. ‘Thedata obtsinedbythe contractorin performingtests ,shallbe submittedto the procuringactivityat the completionof all tests and prior to shippingthe equipmentto the Governmenttestingfscility.
4.3.1 Accessorymaterial. When the procnringactivityrequiresthe shipmentof the equipmentto a Governmentfacilityfor tests,the con-tractor shall submit in addition to the completeequipment,all extramaterials ond design and test data necessaryto test and evaluatetheequipment (4.3.2). The design and test data suppliedby the contractorshall indicatethe physicaland electricalcharacteristicsof the equipmentand establishthat the equipmentconformsto this specification.
4.3.2 Designdata snd material. The followingdesign dataand extramsterislshallbe suppliedwith this preproductionequipmentfOrtesta.
,. a. DesignData:
(1)
(2)
Copies of brief operating instructions.
Copiesof a completeschematicdiagramreducedto its simplestform,showingthe circuitsofall assemblies and ahbassembliesand of 1detailparts not internalthereinindividuallyin schematicform with electricalinterconnec-tion indicated.
I
22
(3)
(4)
(5)
(6)
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MIL-E-5400T
Copies of a practicalviring diagram ofaaaembly or of each constructional
eachunit
thereof~ whichever is prmticable, showingthe phyaikaI location and connections ofdetail parta and aubaaaemblieawith referencesymbols arid terminal numbers indicated.
Copies of a complete cabling diagram af thecomplete equipment.
Copies of”outline dimeriaionalsketches.of allmajor aridminor aasembli& and of any detailexternal parts,“’showingprojectiohs.
:Prior.to submission of the preproductionsample equipment,three copies of a report bythe contractor.ofhis testa on the equipment.In@uded with.thi6 shall be an analysis ofall failureswhich occurred and suggestionsfot improvements in dksign which may beincorporatedin later productions.
,.
b. Extra materiaI:
(1). Complete set of intercOunectiDg cablea.
(2) One set of spare parts peculiar to the equip-ment. (Standard parts, such as resistorsand capacitors in common use are not re-
. quired.)
4.3.3 Scope of teata. First article (pkeproduction)testsshall include all tests deemed necessary by the procuring activity todetermine that the equipmentmeets all the requirementsof this specifica-tion and ‘the contract. These tests shall include environmentaltests inaccordancewith the proceduresof MIL-T-5422 for the Navy, and MIL-STD-SIO~’for the Air Force and Army, to the‘limitsspecifiedherein or in the,detailequipment specificstion. Interferenceteats and test methods shall be inaccordancewith MIL-STD-454,Requirement61,
y For MIL-STD-S1O,test ❑ethods and procedureswill be specifiedin thedetail equipmeitapecificati.on.
4.4 Quality conformancetesta. Quality conformancetestsshall consist of all testa deemed necessaryto determinethat the equipmentssubmitted for acceptanceunder Me contractare equivalentin performanceand .constrnctionto the approvedpreproductionequipment. Quality conformancetests shall consistof “the.following:
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MIL-E-5400T
a. Individualtests: Individualtesta shall be per-formed on each equipment submitted for acceptanceunder the contract.
b. Ssmpling tests: Equipment submitted for samplingtests shall be selected by the contractor underthe supervisionof the Governmentinspector,shallbe representativeof currentproduction, and shallfirst hsve passed the individual tests. Thequantity of sample tests to be performed shall beas specified in the detail specificationor thecontract.
4.5 Test procedures. The proceduresand methods for perform-ing all tests specified herein shall be as stated in the detail equipmentspecification,or if not stated therein, shell be prepared by the contractorand sent to the procuring activity for approval. In the later case, thecontractor shall have obtained approval from the procuring activityprior‘to aubmisaionof equipmentfor teats. The right ia reserved by the procur-ing activity to require additional tests to determine”compliancewith,therequirements of this and the detail equipment specificationswhen it isdeemednecessary,
4.6 Presubmissiontesting. No item, part, or completeequipment shall be submittedto the Government inspectorby the Contractoruntil it has been previously tested and inspected.by the contractor andfound to comply to the best of his knowledge and belief with all applicablerequirement, With the~consent of the contractorand at the discretionof
‘the procuring activity,this prior test and inspectionmay be participated -in or witnessed by the Governmentinspector with the.object of eliminatingthe necessity of repeatingsuch teat and inspectionafter the equipmenthaabeen formally submittedto the Government inspector.
4.7 Rajectionand reteat., The electronic equipment whichhas been rejected may be reworked or have parts replaced to correct thedefects, and resubmittedfor acceptance. Before resubmitting,,full particu-lars concerning previous rejection and the action-taken to correct thedefectsfound in the originalshall be furnishedby the Government inspector.Units rejected after retest shall not be resubmittedwitbout the apecific.-aPProval of the procuring activity,
5. PACKAGING
.5.1 Packaging,packing, and marking. Requirementspackaging, packing, and marking for shipment shall be as specified indetail equipment speci.fication.
6. NOTRS ANO CONCLUDINGMATERIAL
forthe
6,1 Intendeduse. This specificationis intended for useto incorporatein detail equipment specifications,those requirementswhichare common to most airborneelectronicequipments.
24
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MIL-E-5400T
6.2 Ordering data. Procurementdocuments should specify:
a,
b,
* c.
*
*
d.
e.
f.
g.
h.
Title, number, and date of the detail specificationrelating to the electronicequipment to be fur-nished.
Class and type of cooling as specified (see 1.2and 6.2.1).
Data requirements:
3.1.1 (See~IAWD-965 Appendix). Theselected data requirements in support
4.3.1 of this specificationwill be reflectedin a ContractorData RequirementsList
4.3.2 @D Form 1423) attached to the requestfor proposal, invitation for bid, orthe contract,as appropriate.
Preparationfor delivery.
Items of 6.7 not coveredelsewhere.
Safety Program (3.2.22.1) (Not for Army Use)
Parts Control program requirtients(see MIL-STD-965).
Tailoring requirements. Appendix B is a sampletailoringguide.
6.2.1 Unless otherwise stated in equipment apecificationa,requisitions,drawings, contracts,and ordera, Class 1 requirementswillapply (see 1.2).
6.3 Definitions,
6.3.1 For definitionsof part, subassembly,assembly,unit,aet, system, and”❑odels,MIL-STD-280will apply.
6.3.2 Accessoq. An acceasory is an assemblyof a group ofparts or a unit which ia not always requiredfor the operationof a set orunit aa originallydesignedbui serves to extend the functionsor capabili-ties of the set, such as headphonesfor a radio s;t suppliedwith a loud-speaker, a vibratorypower unit for use with a set having a built-inpowersupply, or a remote controlunit for use with a set having”integralcontrols.
6.3.3 Eqnipment. Equipmentis a general.term characterizingthe broad categoryof electronicitems (units,subsystems,systems,etc.).
6.3.4 Completeoperatingequipment. A complete operatingequipment is defined as an equipment,’togetherwith the necessary detaiI
25
HIL-E-5400T
parts, accessories, and components, or any combinationthereof, requiredfor the performance of a specifiedoperationalfunction. Certain equipmentsmay be complete within themselves and not requirethe additionof detail‘parts,accessories,or componentsto perfogaa specifiedoperationalfunction.
6.3.5 Installation(completeequipment). An installation(completeequipment)is definedas a’combinationof assemblies,accessories,and detailparta requiredto make one completeoperatingequipment.Aninstallationcomprisesa groupof permanentlyinstalledpartsand a groupof removableassemblies.
6.3.6 Permanentlyinstalledpart. A permanently installedpart ia defined as a detail part or assembly which is permanently installedas a part of the ‘aircraft. Examples: Rigid or whip antenna, bracket,cable assembly, fairlead,mounting, and plug.
6.3.9 -Electronica.The term ‘Ielectronica”is definedaa asystem,or equipment,the primarypurposeof whichis the transmissionorreception,of intelligence,and.,includesor compriaea,communicationsorsignal equipment,radio, radar, radiation,radio-controllingdevices,meteorological,firecontrol,bombing,flightandnavigationalinstruments,powerplantcontrols,synchronizers,photographicand test equipmentwhen~such”.portionaemploycircuitswhichutilizea.combinationof electricalorelectronicdevicesto generate,control,indicate,or record‘anyform ofalternatingor directcurrents,or both. .
6,3.10 Hermeticsealing. Hermeticsealingis the processbywhichan itemla totallyenclosedby a suitablemetalstructureor caaebyfusion of metallicor ceramicmaterials. This includesthe fusionofdmetslsby welding,brazing,or soldering;the fusionof ceramicmaterialsunderheat or pressure;and the fusionof ceramicmaterialaintoa metallic,aupport,
* 6.3,11 Deleted— .
6.3.~2 Performancerequirementsof the equipment. Whereverraferencedin th$s specification,the “performancerequirementsof equip-ment” is to be understood-tomean the satisfactoryperformanceof allelectricalandmechanicalcharacteristicperformedunderthe ‘condition!’,‘!destructivefr,and “acceleratedlife tests”describedin the equipmentspecificationfor the purposeof simulatinganticipatedfield servicedemandsas closelyas possible.
.
MIL-E-5400T”
6.3.13. Intermittentand short-timeoperation. Intermittentand short-timeoperationsare the alternatingperiods of operation foF thespecifiedtime followedby 15 minntes of nonoperation.
6.3.14 Reordezedproduction equipment. Reordered productionequipmentis iqnipmentprocured on each contractafter”the OriginalCategOrYIII contract for the equipment, regardlessof the contractor: e.g., ifcontractor “X” is granted the original production, then the equipmentprocnred.on a second or subsequentcontract is ‘consideredreorderedproduc-tion equipment,whether it”is procured from contractor“X” or a new contractor.
6.3.15 Procuring activity. The @ilitary or Federal agencycontractingfor equipment. ,.
.
6.4 Uae of helium. Heliumshouldnotbeused as a pressuriz-ing gas irisealedunits‘containingelectrontubes..Whenit is necessarytonse heliumfor leakdetectionpurposes,exposure.shouldbe limitedto thetime necessary for the test,followedby thorough.“purging.
* 6.5 Deleted.
6.6 Publications.In”the designof electronicequipment,considerationshouldbe giveuto the infoniationcontainedin the followingpublications:
a. Handbook, PreferredCircnit.s NAVAIR-16-1-519,Navy AeronauticalElectronic Vol. 2Equipment
b. Electronic Circuits MIL-STD-439
6.7 Detail.equipmeut specifications. Since thisspecificat-ion covers only the general requirementsfor parts, materials,processes,design and conitruction, the detail equipmentspecification,contract,ororder should specify actual reqhirernentsfrom the mQltiPle chOicesOr ex-ceptionsavaiiablein the followingparagraphs:
6.8 Superaessiondata. Thisissueof‘MIL-E-5400supersedesallpreviousissueaof MIL-E-5400fornew designs.Previousissuesof MIL-E-5400 remain in effect to cover the procurementof previously designedequipment,
6.9 Changeafrorapreviousissue. The margins of thisspecificationare markedwith an asteriakto indicatewherechanges,“fromthepreviousissuehave:beenmade. Thisis doneaa a convenienceonlyandthe Governmentaaawmesno liabilitywhatsoeverfor any inaccuraciesinthese notations,Biddersand contractorare cautionedto evaluatetherequirementsof this-documentbaaedon theentirecontent,irrespectiveofthemarginalnotationsand relationshipto’the laatpreviousissue.
28
MIL-E-5400T
t- !1
I
-
29
MIL-E-5400T
CURVES Ill, IV, V AND VI (lg)
~
(/ CURVE II (2g)
Iill1111
d~::::
*CURVE IV (log)
CURVE Ill (%)
\< CURVE II (2g)
iitll”t~1 [111’”1111!11111
ACCELERATIONLEVEL: +g (PEAK)
\
h1111
I[1,1[ Ill!~~! I
I
“ II
I II
IL i
,11.1 I II I: 142023 2S 527490 104 Srm
FREQUENCY (Hz)
:CURVE I (OF PREVIOUS ISSUE) - REPLACE BY CURVE IV“CURVE II . EQUIPMENT DESIGNED FOR OPERATION ON ISOLATORS WITH-
ISOLATORS REMOVEDCURVE Ill - EQUIPMENT MOUNTEO IN FORWARO HALF OF THE FUSELAGECURVE IV - EQUIPMENT MOUNTED [N REAR HALF OF FUSELAGE OR WING AREA
“CURVE V - EQUIPMENT MOUNT’EO IN ENGINE COMPARTMENT OR ENGINE PYLONCURVE VI - EQUIPMENT MOUNTED DIRECTLY ON ENGINE
I’IGURB2 (Sheet1 of 3). Sinusoidalvibrationreciuirementsforequipmentdesignedfor installationin propellerairplanes.
NOTE: Figure1 of previousissueshas beendeleted
30
liIL-E-54001’
6:<u
0.10 .CURVES 1116,lVa, Va AND VI. (Ig)---
CURVE Ila (2EI)
:!’- -r.- ---
,,. ”
1“
I
ACCELERATIONLEVEL: ig (PEAK)
5 142023 33 527490. 104
FREQUENCY (Hz)
CURVE la (OF PREVldJS ISSUE5) - REPLACEOBY CURVE ‘IV.CURVE Ilo - EQUIPMENT DESIGNED FOR OPERATION ON ISOLATORS WITH
ISOLATORS REMOVE.D. .CURVE Ill. -’EQUIPMENT’MOUNTED IN FORiARD HALF OF FUSELAGE OR
IN WING AREA WITH ENGINES AT REAR OF FUSELAGECURVE (V. - EQUIPMENT MOUNTED IN REAR HALF CJFFOSELAGE OR IN ““’
WING ,4REA WITH WING OR FRONT MOUNTED ENGINE5CURVE V. - EQUIPMENT MOUNTED IN ENGINE COMPARTMENT OR ENGINE PYLONCURVE Vla - EQUIPMENT MOUNTED DIRECTLY ON ENGINE
10.1 -, Thisappendixlistsselectedspecifications,standardssndpublicationsrecommendedforuse in thedesignand constructionof air-borneelectronicequipment.
20. APPLICABLEDOCUNSNTS
SeeAlphabeticalandNumericallists
20.1 Documenttitles. Documenttitles,in somecases,havebeenrearrangedformorepracticaluse in locatinginformation,
Examples:
“Applicationof ElectricalResolvers”
rearrangedto read
l!Reaolvers,Electrical,ApplicationOf”
l!Li~tof StandardSemiconductorDevices”
rearrangedto read
!iSemiconductorDevices, List of Standard”
I\Listof StandardMicrocircuits”
rearrangedto read
“Microcircuits,Listof Standardt’
30. REQUIREMENTS
30.1 .Effectiveissue. The issueof the selectedspecification,standsrd,or publicationthatappliesis the issueof thatdocumentineffecton the dateof invitationforbidsor requestforproposals.Laterrevisions,amendments,QualifiedProductsLists,and documentssupersedingdocumentslistedin AppendixA may be usedwhenpreferredby the contractor.Whena lsterissueis used,all applicablerequirementsof the laterissueshallbe used.
38
MIL-E-5400TAppendixA
30.2 Applicationof selected”documents. Before proceedingwiththe applicationof any document listed in this appendix,all specificationand contractualrequirementsmust be reviewed~Y the !Ontra~tOr~and the ‘“extent of the applicationde?.etiined.
30.3 SupersessiOn. l%is”appendixsupersedes”all issuesof HILIT&Y/ANA BULLETIN 400 as.relatedto MIL-E-5400,for”new desig:a. Previousissues Of MILITARY/ANABULLETIN400.rtiain in effect ‘or ‘he Procurement‘fpreviouslydesigned equipment..
10.1 *. This appendixprovides guidanceinformationonlyand is not’intendedto be invoked as a contractual requirement.
10.2 This appendix providea a sample tailOring &uide forllIL-E-5400based on the relationshipof tailoring specificMIL-E-5400requirementsduring various.developmentand production.phsses as definedin 141L-STD-280A. This guide is not intefidedto.be restrictiveas tothe” methods/factors to be considered for tailoring applications.Examples of other methods/factors concerned with tailoring of MIL-E-5&O0 requirementsare shown in paragraph 40.
,.Production- Properapplicationof tailoredrequirementsduringthe engineering,design/prototypephaaeshouldprecludethenecessity for applicationof:additionalmilitary requirementsand tailoriugduring the production phase,except for possible refinementof some requirements.