B0MBARDIER:earjetlrc 

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LEARJETP.OBox7707Wichita,KS67277-7/01UnitedStateswwwbombardiercornTEL316-946-2000September3,2013F4X316-946-2809InReplyreferto:L706-2013-02137U.S.DepartmentofTransportationDocketOperationsWestBuildingGroundFloor,RoomW12-1401200NewJerseyAvenue,SE.Washington,DC20590SUBJECT:PetitionforExemption—14CFRPart25,Section25.813(e)Amendment25-116forLearjetModelLJ-200-1A1OREF:FAAProjectNumberTC4960W1-TPartialGrantofExemption10670to14CFRPart25,Section25.813(e)Amendment25-116forLearjetModelLJ-200-IA1ODecember11,2012PublicDocket:FAA-2009-1077DearSirorMadam:Inaccordancewith14CFRPart11,LearjetInc.submitsthispetitionforexemptionfrom14CFRPart25,Section25.813(e)Amendment25-116,emergencyexitaccess,fortheLearjetModelLJ-200-1A1O.RelieftothisrequirementwouldpermittheinstallationofpartitiondoorsinthecabinofthenewLearjetModelLJ-200-1A1O.AnapplicationforanewTypeCertificate(TC)hasbeensubmittedbyLearjetInc.forthisnewmodelandFAAProjectNo.TC4960W1-Thasbeenassignedtothiseffort.ThecertificationbasisfortheLearjetModelLJ-200-1A1Ois14CFRPart25,Amendment25-1through25-127.ThebasisofthispetitionhasalreadybeenestablishedbytheFAAinthegrantingofexemptionsasshowninthefollowingdocuments:•FAAExemptionNo.10188,issuedDecember27,2010—GulfstreamAerospaceCorp.fortheModelGVI•FAAExemptionNo.8767,issuedAugust14,2006—CessnaAircraftCompanyfortheModel750(CitationX)•FAAExemptionNo.8621,issuedOctober3,2005—CessnaAircraftCompanyfortheModel560XL(CitationXL)•FAAExemptionNo.8123,issuedSeptember3,2003—MidcoastAviationInc.fortheDassaultAviationMystere—Falcon900andFalcon900EXL706-2013-02137page2of2Learjethasbeengrantedapartialexemption(10670)from14CFRPart25,Section25.813(e)Amendment25-116fortheuseofdoorsontheLJ-200-1A1O.Thispartialgrantofexemptionallowstheuseofdoors,howeverlimitstheirusetoprivate(Part91)operations.Throughthedevelopmentofawhitepaper,LearjetandtheFAAhavedevelopedasetofcriteriarequiredtoallowtheinstallationofalavatorydoorontheLJ200-1A10forPart135operations.Learjetsubmitstheattachedasarequestforanewexemption.ThisexemptionrequestaddressestheperformancestandardsfortheinteriordoorsforbothPart91andPart135operations.RobertCahnCertificationManager,NewProductDevelopmentLearjetInc.OneLearjetWayWichita,KS67209-2942robert.cahnäaero.bombardier.comTel:(316)946-8968AttachmenttoLetterL706-2013-02137Page1of7PetitionforExemptionto14CFRPart25,Section25.813(e)Amdt.25-116Requirement14CFRPart25,Section25.813(e),Amendment25-116—“Nodoormaybeinstalledbetweenanypassengerseatthatisoccupiablefortakeoffandlandingandanypassengeremergencyexit,suchthatthedoorcrossesanyegresspath(includingaisles,crossaislesandpassageway’s).”DiscussionWhen14CFRPart25,Section25.813(e)Amdt.25-1wasissuedtorestrictinstallationofdoorsbetweenpassengercompartmentsitdidnotrestricttheinstallationofdoorsforwardoraftofpassengercompartments.Assuchitcontinuedtobecommonpracticeforbusinessclassaircrafttoinstalldoorswhichisolatedthepassengerseatingareasfromcrewworkareas.Thesedoorslowerednoiselevelsinthepassengercabinandcreatedeffectiveworkenvironmentsonthesebusinessaircraft.OnOctober27,2004,Amendments25-116and121-306,titled“MiscellaneousCabinSafetyChanges’werepublishedintheFederalRegister.Thisrevised14CFR25.813(e)torestricttheinstallationofanyinteriordoorbetweenapassengerseatandanyemergencyexit,effectivelyrestrictingtheuseofallinteriordoors.Inaddition,theFAArevised14CFR121.310(f)(6),toprohibitthesedoorsinairplanesmanufacturedafterNovember27,2006,andoperatedunder14CFRpart121.However,atthattimetheFAAchosenottoamend14CFRPart135or14CFRPart91.Asaresult,aircraftcertifiedpriortoAmendment25-116,andoperatingunderotherthan14CFRPart121,arepermittedtoincorporatethesetypesofdoorinstallations.WhenAmendment25-116wasissued,theFAAnotedthatthischangewasincorporatedduetoconcernsoverpassengers’abilitytorecognizethatanexitexistsbeyondaninteriordoorforwardoraftofthepassengercompartment;andreachtheexitbeyondthedoorintheeventoffailureoftheinteriordoortoopenorbeingjammed.FortheLearjetModelLJ-200-1A1Oexecutivebusinessaircraft,LearjetInc.believesthatitispossibletoprovidealevelofsafetyconsistentwiththeintentofthe14CFRPart25regulationswhileallowingforinstallationofcertaininteriorpocketdoors.Thiswillbeaccomplishedbyincorporatingspecificdesignfeaturestoensurethepassengers’abilitytoeffectivelyidentifytheexitandegresstheaircraftisnotdiminished.LearjetInc.isproposingspecificdesignrequirementstoprovidethislevelofsafetyappropriatetotheoperationsofexecutivebusinessaircraft,bothprivate(14CFRPart91)andforhire(commoncarriage)(14CFRPart135)equippedwithpartitionsanddoors.TheLearjetModelLJ-200-1A1Oexecutivebusinessaircraftwillbedesignedtotherequirementsof14CFRPart25,Transportcategory.Theserulesbasicallyaddressairplanesthatareusedforthecarriageoffarepayingpassengersorthegeneralpublic.Additionally,therulesconsideraircraftwithapassengerseatingofupto500.ThenewLearjetModelLJ-200-1A1Owillhaveamaximumseatingcapacityoften(10)passengers,andwillbeequippedexclusivelyforexecutivebusinessaircraftuse.Thedifferencebetweenthecommercialtransportcategoryaircraftusedinairlineoperationandaircraftspecificallyusedforexecutivebusinessoperationsarenotsegregatedinthe14CFRPart25rules.Learjetcontendsthatairplanesspecificallydesignedforexecutivebusinessoperations,whetherprivateorforhire(commoncarriage)shouldbeeligiblefortheacceptancebyexemptionofcabinfeatureswhichdonotcomplywiththefullrequirementsof14CFRPart25providedthattheydemonstrateandprovidesimilarlevelsofsafety.AttachmenttoLetterL706-2013-02137Page2of7Aircraftspecificallydesignedforexecutivebusinessaircraftoperationcontainfeaturesdesignedtosupportpassengerswhoflyfrequentlyandareveryfamiliarwiththeexecutivebusinessaircraftinwhichtheyaretraveling.Thecrewofanexecutivebusinessaircraftisintimatelyincontactwiththepassengersthusthecommunicationsarefirsthandwhichensuressafetyandunderstandingofoperation.Furthermore,passengerswillbebriefedastotheproperuseandsafetyfeaturesofthedoorsenhancingsafetyandensuringrapidegressfromtheaircraftinanemergencysituation.Thisistypicallyaddressedinthepre-flightbriefingsfromthepilotspriortotakeofffor14CFRPart91/135operationsandadditionallyinthepassengerbriefingcardsfor14CFRPart135operations.ThenewLearjetModelLJ-200-1A10willhaveamaximumseatingcapacityoften(10)passengersandtwo(2)crewmembers.Thestandardfloorplanarrangementwillconsistoffour(4)clubseatingarrangementinthemainpassengercabin(seeFigure1).OverWingTypeIllEmergencyExitFigure1—StandardFloorPlanArrangementOptionalfloorplanarrangementswillalsobeavailable,theywillconsistofathree(3)clubseatingarrangementsandathree(3)placeside-facingdivan(SeeFigure2).Installedintheaftsectionofthemainpassengercabin,aspartofboththestandardandoptionalseatingarrangements,willbeamanuallyoperatedsingle“pocket”doorstowedintheLHAftLavatoryPartitionthatwillseparatethemainpassengercabinfromtheaftlavatory.TheaftlavatoryareawillconsistofavanitycabinetontheLHsideandatoiletenclosureontheRHsidewithprovisionsforanoptionalbeltedseat.EntryypeIEiSinglePocketDoor—AftLavatory



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IOptionalSinglePocketDoor-Mid-CabinOverWingTypeIllAttachmenttoLetterL706-2013-02137Page3of7EmergencyExit..Figure2—ExampleofOptionalSeatingConfigurationAsacustomerselectedoption,amanuallyoperatedsinglemid-cabin“pocket”doorwillbeinstalledjustaftoftheRHforwardgalley.Theoptionalmid-cabindoorwillonlybeavailableforuseiftheaircraftisoperatingunderPart91operations.WhentheaircraftoperatesunderPart135operations(forhireorforcommon-carriage),thisdoorwillberequiredtoberemovedormechanicallydisabledinthestowedposition.Themainentrydoor,aType1exit,willbelocatedontheLHsideoftheaircraft,approximatelythreefeetaftofthecockpit.Frominsidetheaircraft,asinglehandle,locatedontheforwardsideofthedoor,isrotatedupwardreleasingthelockingmechanismallowingthedoortoopenoutward.Asetofstairsareintegratedintothedooralongwithhandrailsontheaftsidetoassistoccupantsinenteringandexitingtheaircraft.InstalledontheRHside,justoutboardofthetoiletenclosureintheaftlavatory,willbeaTypeIllemergencyexit.OpeningoftheTypeIllemergencyexitfrominsidetheaircraftwillconsistofrotatingahandleupandforwardwhichwillallowthedoortomoveupwardtoclearthelowerlatchesandthusswingoutwardandforwardalongthefuselage.Thedoorwillremainattachedtothedooropeningstructureandwillnotbearemovableplugstyledoorlikeotheraircraftinitsclass.Additionally,theTypeIllemergencyexitdoorwillhavealatchingmechanismtoretainitintheopenposition.Thereareseveraltechnicalargumentstosupportspecialconsiderationforthissizeofaircraftwithapassengercountoften(10)orless;whichissignificantlylessthantheamountcarriedinairlineservice.OneofwhichisthedistancebetweentheTypeIandTypeIllemergencyexitsofapproximately18.5feetandseparatedbyonesingleaisle.Passengersleavingtheirseatswilleithermoveforwardorafttoreachanemergencyexit.BulkheadExitsignswillbeinstalledonboththeforwardLHpartitionandtheRHaftpartition,providingoccupantsawarenessthattheexitsarelocatedbeyondthebulkheads.Inaddition,openingoftheTypeIIIemergencyexitfrominsidetheaircraftwillbemucheasierinthat,intheeventofanemergency,anoccupantwillnothavetodecidewhattodowithadoorthatisatleast20incheswideby36incheshighweighingbetween45to50lbs.Alltheywillhavetodoisrotatethehandleupandforward,pushthedooroutwardandforwardalongthefuselagewhereitwilllockintotheopenposition.TheopeningoftheTypeIdoorfrominsidetheaircraftwillonlyrequiretherotationofthehandle——I’Entry/TypeIExitSinglePocketDoor—AftLavatory—OptionalSinglePocketDoor-Mid-CabinAttachmenttoLetterL706-2013-02137Page4of7upwardandpushingthedooropen.Furthermore,theproposeddesignfeaturesofthepartitionswithpocketdoorswillhavesafetyfeaturesthatwillbeequaltowhatisrequiredbytheruleandisfurtherdescribedintheOccupantSafetyConsiderationsbelow.OccupantSafetyConsiderationsForPart91Operations,theaftlavatorydoorandthemid-cabindoorwillincorporatethefollowingdesignfeatures.Whenthemid-cabindoorisinstalled,theairplanewillnotbeoperatedforhireorofferedforcommoncarriage.Thisprovisiondoesnotprecludetheoperatorfromreceivingremunerationtotheextentconsistentwith14CFRparts125and91,subpartF,asapplicable.ThesedesignfeaturesaresimilartoexemptionspreviouslygrantedforprivateaircraftoperationsandthelimitationswillbedocumentedinthelimitationssectionoftheAFM:•Thedoorwillopenandcloseinatransversedirection.Thatis,thedirectionofmotionofthedoorwillbeatarightangletothelongitudinalaxisoftheairplane.A“pocketdoor”isoneexampleofsuchadesign.Thiswilltendtominimizethechancethattheinertiaforcesofanaccidentcouldforcethedoorclosed.•Thedoorwillhavearedundantmeanstolatchthedooropen(stowed)positionfortaxi,take-offandlanding.Eachlatchingmeanswillbeshowntoretainthedoorintheopen(stowed)positionunderallemergencylandingloadsspecifiedunder14CFR25.561(b).•Thedoorsbetweenthepassengercompartmentsandemergencyexitswillbefrangible.Frangibilityisintendedtoensurethatifadoorisjammedclosed,occupantscanescapeineitherdirectionandemergencyequipmentcanbemoved.Two(2)testswillbeconductedtoshowtheeffectivenessofthefrangibledoor.Onewillshowthata5thpercentilefemalewillbeabletoegressforwardoutofthelavatory.Asecondtestwillshowthata5thpercentilefemalewillbeabletoegressafttowardstheTypeIllover-wingexit.Bothtestswillshowthatag5thpercentilemalewillbeabletofollowthroughtheopeningthatthepercentilefemalehadcreated.GuidancefromAdvisoryCircular25-17A,TransportAirplaneCabinInteriorsCrashworthinessHandbook,paragraph43b(2)willbefollowed.•Nohazardswillbepresentafterbreakingthrufrangibledoor.•Aplacarddescribingthefrangibilityprocedurewillbeinstalledinaconspicuouslocationonbothsidesofthedoor.•Aplacardrequiringthedoortobeintheopenpositionwillbeinstalledinaconspicuouspositiononbothsidesofthedoor•AnAmberCASmessagewillalertthepilotsifeitheroftheinteriordoorsarenotintheproperlyopen(stowed)positionwhenthelandinggearisdownortheflapsarenotfullyretractedfortaxi,takeoff,andlanding.•Thedoorswillbeequippedwithanoverridefunctionallowinganoccupanttoopeneitherdoorfromthecabinside.ForPart135operations,onlytheaftlavatorydoorwillbeafunctionaldoor.Themid-cabindoorwilleitherberemovedormechanicallylockedinthestowedposition,preventingitfrombeingused.Inadditiontotherequirementslistedabove,thefollowingdesignfeatureswillbeincludedinthelavatorydoorandthelimitationswillbedocumentedinthelimitationssectionoftheAFM:•OperationwillbelimitedtoPart135operationsandbelow.NoPart121operationswillbepermitted•Theinstallationwillbelimitedtothelavatorydoor.AttachmenttoLetterL706-2013-02137Page5of7•Aminimum15”widthpassagewaywithnoencroachmentwillbemaintainedfromthelavatorydoortotheTypeIllexitopening.•Theairplane’smaximumpassengercapacitywillbelimitedto10andtheTCDSwillreflectthismaximumpassengercapacity.•Thefrangiblefeaturesofthedoorwillbedemonstratedbytest.Bothtestslistedabovewilldemonstratethefrangiblefeaturesofthedoor.Additionalcriteriawillbeshownduringthetestwheretheevacueesaremovingaftthroughthelavatorycompartment:oThetestwillincludethe5thpercentilefemalepassingthroughthelavatorydoorutilizingitsfrangibilityfeaturesandopeningtheTypeIllexit;allwithin10seconds.oThetypeIllexitisdefinedasopenwhenitmeetstherequirementsdefinedin§25.809(i).oTheresultantopeningthatthefemalemakeswillbeshowntobebigenoughataminimumfortheg5thpercentilemaletoevacuate.GuidancefromAdvisoryCircular25-17A,TransportAirplaneCabinInteriorsCrashworthinessHandbook,paragraph43b(2)willbefollowed.oThepre-flightvideobriefingwillbeprovidedtothetestsubjectspriortorunningtest.oThetestwillbeconductedunderemergencylightingconditionsandnormalairplaneattitude.•Aself-stowingTypeIllexit(orlarger)willbeinstalledintheaftlavatorycompartment.TheTypeliiexitwillbedesignedsuchthatwhenoperatedtothefullyopenposition,thehatch/doorisautomaticallydisposedsothatitneitherreducesthesizeoftheexitopening,thepassagewayleadingtotheexit,northeunobstructedspacespecifiedintheregulationstobelowtherequiredminimumdimensions.Inthefullyopenpositionitwillnotobstructegressfromtheexitviatheescaperoutespecifiedin§25.810(c).•Avideobriefingwilldemonstratetothepassengerstheuseofthedoorincludingitsfrangiblefeatures.TheAFMwillrequirethatthevideoisshowneachflight.•Thedoorwillbedesignedtobeautomaticallyopen(stow)whenthelandinggearisdownortheflapsarenotfullyretracted.Itwillbedesignedsothatitcanonlybeclosed(deployed)whenthegearandflapsarefullyretracted(airborneconfiguration),orwhentheparkingbrakeisengaged.•Thelatcheswillbecycletestedtoaminimumof100,000cyclestoaccountforwearandtearinservice.•InaccordancewithLearjet’sapproachtocompliancewith14CFR25.1309,thefailuretoegressthroughanyindividualemergencyexitisclassifiedasMajor.LearjetwilldemonstratethattheprobabilityoffailuretoegressthroughtheTypeIllemergencyexitswillmeetthecriteriaforafailurescenarioclassifiedasMajor.Thiswillincludeconductingaquantitativeanalysisthatshowstheprobabilityofthisscenariotobelessthani0perflighthour.Thishazardcriticalityisbasedon14CFR25.783(b)(2).AttachmenttoLetterL706-2013-02137Page6of7EffectoftheExemptiononSafetyAcceptanceoftheproposeddesignontheLearjetModelLJ-200-1A1Owillensurethatalevelofsafetyconsistentwiththeintentoftheregulationhasbeenprovided.Thedesignoftheproposedinteriordoorswillensurethesamelevelofsafetyforcabinegressasisrequiredforanyemergencyexitandwillprovideaclearegresspath.ThiscombinedwithothercharacteristicsoftheLJ-200-1A1OsuchastheselfstowingTypeIllexitdoorwillprovidealevelofsafetyexceedingthatcurrentlyprescribedunder14CFRPart25.Learjetrecognizesthattheexemptionspreviouslygrantedhaveastipulationthattheaircraftmustnotbeoperatedforhireorofferedforcommoncarriage.However,Learjethasproposedanumberofadditionalsafetyfeaturesforthelavatorydoorsothatoccupantswithlimitedknowledgeoftheaircraftwillclearlybeabletodealwithsafetysituationssimilartooccupantswithintimateknowledge.Thesesafetyfeatureswillensurethesamelevelofsafetyforpassengeregressasisrequiredforanyemergencyexitandwillprovideaclearegresspath.AlthoughthecurrentoperationalrequirementsunderPart91andPart135forthistypeofaircrafthavenotbeenamendedtocorrespondtoPart25restriction,LearjetacknowledgesthatthePart25changeisanimportantenhancementtothelevelofsafetyofferedbynewlymanufacturedaircraft.ThedesigncriteriaproposedbyLearjetraisesthecurrentlevelofsafetytothatenvisionedbyAmendment25-116toPart25.IssueofPublicInterestLearjetiflC.hasbeenmanufacturingexecutivebusinessaircraftforawidevarietyofcustomers,worldwideformorethanfifty(50)years.Itsleadershipinthebusinessaviationisdueinalargeparttoitsinnovativedesignandadvancedtechnologies,providingcustomerswithefficient,safeandeconomicalexecutiveaircraft.Customerexpectationandsatisfactionisacornerstoneinthesaleofbusinessaircraft.Customersinthismarketsegmenthavecometoexpecttheabilitytosegregatetheircabinintoprivateareastoconducttheirbusinesstransactions.Lavatoryareashaveanadditionalexpectationofprivacythatsimplecurtainsdonotprovide.LimitingtheuseofdoorsontheLearjet200-lAbwouldnegativelyaffectthemarketabilityandsaleoftheaircraft.Thiseffectwouldbeevengreaterifthelavatorydoorwerenotavailableforallrequestedflightoperations.Learjetprovidesthousandsofjobstotheregion.Inaddition,theprogramutilizesnumeroussuppliesfromallovertheUnitedStates,providingeconomicgrowthandstabilizationoftheAmericanjobmarket.ThelossofsaleswouldimpactnotonlyLearjet,butitsentiresupplychain.Additionally,sincecustomersdesirethesedoorsandexpectalevelofprivacyinlavatorycompartments,theymayoptforaircraftdesignedtoanearliercertificationbasis,inlieuoftheLJ-200-1A1O.ThiswillrestricttheadvancementsinsafetyintroducedbytheLJ-200-1A1Oairplane,notonlyintheareasofcabinsafety,butthoroughouttheairplane.ThisiscountertobothLearjet’sandtheFAA’sgoalofcontinuousimprovementinoverallaircraftsafety.Theadvancementofaircraftsafetyisintheinterestofthepublic.OperationOutsideoftheUnitedStatesTheEuropeanAviationSafetyAdministration(EASA)CertificationStandard(CS)25.813regulationisnotcurrentlyharmonizedwith14CFR25.813anddoesnotrestrictthesetypesofdoorinstallations.RegardlessofEASArequirements,per14CFR11.81(h)LearjetrequestsconsiderationbegiventoextendingthisexemptionforoperationoutsideoftheUnitedStates.LearjetaircraftareroutinelyregisteredandoperatedoutsideoftheUnitedStatesandprojectionsarethesamefortheLearjetModelLJ-200-1A1O.GrantingthisextensionofprivilegeswillallowforoperationsAttachmenttoLetterL706-2013O2137Page7of7basedwithinforeigncountries,includingEUmembercountries,havingbilateralagreementswiththeUnitedStatesacceptingFAA14CFRpart25astheirairworthinessstandardsfortransportcategoryaircraft.LearjetbelievesthatlimitingthisexemptiontousewithintheU.S.wouldputunfairrestrictionsonthemarketabilityofthisaircraft.ConclusionBasedontheaboveinformation,LearjetInc.believesthatanexemptionto25.813(e)isinthepublicinterestandwouldnotadverselyaffectsafetyofthepassengertravelingaboardtheLearjetModelLJ-200-1A1O.