DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2015-0593;DirectorateIdentifier2015-NE-08-AD]RIN2120-AA64AirworthinessDirectives;Rolls-RoycepicTurbofanEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Noticeofproposedrulemaking(NPRM).[4910-13-PJSUMMARY:Weproposetoadoptanewairworthinessdirective(AD)forallRollsRoycepic(RR)RB211-535E4-37,RB211-535E4-B-37,andRB211-535E4-C-37turbofanengines.ThisproposedADwaspromptedbyRRupdatingthelifelimitsforcertainhigh-pressureturbine(HPT)disks.ThisproposedADwouldrequirereducingthecycliclifelimitsforcertainHPTdisks,removingthosedisksthathaveexceededthenewlifelimit,andreplacingthemwithserviceableparts.WeareproposingthisADtopreventfailureoftheHPTdisk,whichcouldresultinuncontaineddiskrelease,damagetotheengine,anddamagetotheairplane.DATES:WemustreceivecommentsonthisproposedADby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].ADDRESSES:Youmaysendcommentsbyanyofthefollowingmethods:•FederaleRulemakingPortal:Gotohttp://www.regulations.gov.Followtheinstructionsforsubmittingcomments.•Mail:DocketManagementFacility,U.S.DepartmentofTransportation,1200NewJerseyAvenueSE.,WestBuildingGroundFloor,RoomW12-140,Washington,DC20590-0001.•HandDelivery:DelivertoMailaddressabovebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.•Fax:202-493-2251.ForserviceinformationidentifiedinthisproposedAD,Rolls-Royceplc,CorporateCommunications,P.0.Box31,Derby,England,DE248BJ;phone:011-44-1332-242424;fax:011--44-1332-249936;email:http://www.rollsroyce.com/contact/civil_team.jsp;Internet:https://www.aeromanager.com.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-0593;orinpersonattheDocketOperationsofficebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,themandatorycontinuingairworthinessinformation(MCAI),theregulatoryevaluation,anycommentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt.FORFURTHERINFORMATIONCONTACT:Wego Wang,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEngland2ExecutivePark,Burlington,MA01803;phone:781-238-7134;fax:781-238-7199;email:wego.wang@faa.gov.SUPPLEMENTARYINFORMATION:CommentsInvitedWeinviteyoutosendanywrittenrelevantdata,views,orargumentsaboutthisproposedAD.SendyourcommentstoanaddresslistedundertheADDRESSESsection.Include"DocketNo.FAA-2015-0593;DirectorateIdentifier2015-NE-08-AD"atthebeginningofyourcomments.Wespecificallyinvitecommentsontheoverallregulatory,economic,environmental,andenergyaspectsofthisproposedAD.WewillconsiderallcommentsreceivedbytheclosingdateandmayamendthisproposedADbasedonthosecomments.Wewillpostallcommentswereceive,withoutchange,tohttp://www.regulations.gov,includinganypersonalinformationyouprovide.WewillalsopostareportsummarizingeachsubstantiveverbalcontactwithFAApersonnelconcerningthisproposedAD.DiscussionTheEuropeanAviationSafetyAgency(EASA),whichistheTechnicalAgentfortheMemberStatesoftheEuropeanCommunity,hasissuedEASAAD2014-0249R1,datedFebruary18,2015(referredtohereinafteras"theMCAI"),tocorrectanunsafeconditionforthespecifiedproducts.TheMCAIstates:Anengineeringanalysis,carriedoutbyRR,ofthelivesofcriticalpartsoftheRB211-535E4-37engine,hasresultedinreducedcycliclifelimitsforcertainhighpressure(HP)turbinediscs.ThereducedlimitsarepublishedintheRRRB211-535E4-37Time3LimitsManual(TLM):05-10-01-800-000,currentRevisiondatedJuly2014.Operationofcriticalpartsbeyondthesereducedcycliclifelimitsmayresultinpartfailure,possiblyresultinginthereleaseofhighenergydebris,whichmaycausedamagetotheaeroplaneand/ori!1iurytotheoccupants.YoumayobtainfurtherinformationbyexaminingtheMCAIintheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-0593.RelatedServiceInformationunder1CFRPart51WereviewedRRNon-ModificationServiceBulletin(NMSB)No.RB.211-72-0188,RevisionNo.I,datedOctober30,2013,andRRRB211-535E4-37,TimeLimitsManual(TLM):05-10-01-800-000,RevisiondatedJulyI,2014;andRRRB211-535E4-37,TLM:05-00-01-800-000,RevisiondatedJuly1,2014.TheNMSBdescribestheupdatedlifinganalysisoftheaffectedHPturbinedisks.TheTLMsproviderevisedlifelimitsfortheaffectedHPturbinedisks.ThisserviceinformationisreasonablyavailablebecausetheinterestedpartieshaveaccesstoitthroughtheirnormalcourseofbusinessorseeADDRESSESforotherwaystoaccessthisserviceinformation.FAA'sDeterminationandRequirementsofThisProposedADThisproducthasbeenapprovedbytheaviationauthorityoftheUnitedKingdom,andisapprovedforoperationintheUnitedStates.PursuanttoourbilateralagreementwiththeEuropeanCommunity,EASAhasnotifiedusoftheunsafeconditiondescribedintheMCAIandserviceinformationreferencedabove.WeareproposingthisADbecauseweevaluatedallinformationprovidedbyEASAanddeterminedtheunsafeconditionexistsandislikelytoexistordeveloponotherproductsofthesametype4design.ThisproposedADwouldrequirereducingthecycliclifelimitsforcertainHPTdisks,removingthosedisksthathaveexceededthenewlifelimit,andreplacingthemwithserviceableparts.CostsofComplianceWeestimatethatthisproposedADaffects650enginesinstalledonairplanesofU.S.registry.Wealsoestimatethatitwouldtakeabout0hoursperenginetocomplywiththisproposedAD.Theaveragelaborrateis$85perhour.Pro-ratedcostofrequiredpartscostwouldbeabout$12,213perengine.Basedonthesefigures,weestimatethecostofthisproposedADonU.S.operatorstobe$7,938,450.AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency'sauthority.Weareissuingthisrulemakingundertheauthoritydescribedin"SubtitleVII,PartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.5RegulatoryFindingsWedeterminedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythisproposedregulation:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)Wi11notaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,Incorporationbyreference,Safety.TheProposedAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAproposestoamend14CFRpart39asfollows:PART39-AIRWORTHlNESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.6§39.13[Amended)2.TheFAAamends§39.13byaddingthefollowingnewairworthinessdirective(AD):Rolls-Roycepic:DocketNo.FAA-2015-0593;DirectorateIdentifier2015-NE-08-AD.(a)CommentsDueDateWemustreceivecommentsby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER).(b)AffectedADsNone.(c)ApplicabilityThisADappliestoallRolls-Roycepic(RR),RB211-535E4-37,RB211-535E4-B-37,andRB211-535E4-C-37turbofanengines.(d)ReasonThisADwaspromptedbyRRupdatingthelifelimitsforcertainhigh-pressureturbine(HPT)disks.WeareissuingthisADtopreventfailureoftheHPTdisk,whichcouldresultinuncontaineddiskrelease,damagetotheengine,anddamagetotheairplane.(e)ActionsandComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.(1)AftertheeffectivedateofthisAD,useRRRB211-535E4-37TimeLimitsManual(TLM):05-10-01-800-000,RevisiondatedJulyI,2014(referredtohereafteras'theTLM'),todeterminethenewlifelimitsfortheaffectedenginemodelsand7configurations,withtheexceptionofthoseenginemodelsmentionedinparagraph(e)(2)ofthisAD.(2)ForRRRB211-535E4-B-37orRB211-535E4-C-37engineswithanaffectedHPTdiskthatwaspreviouslyinstalledonanRB211-535E4-37engineoperatedunderFlightPlanA,usetask05-00-01-800-000intheTLMtore-calculateequivalentcyclessincenewtoobtainthenewlifelimit.(3)IfanaffectedenginemodelhasanHPTdiskinstalledwithPINUL27681orUL39767,removetheaffectedHPTdiskbeforetheaccumulatedcycliclifeexceedseither19,500flightcycles(FCs)underFlightPlanA,or14,700FCsunderFlightPlanB,orwithin25FCsaftertheeffectivedateofthisAD,whicheveroccurslater.(4)Forallaffectedengines,otherthanthosespecifiedinparagraph(e)(3)inthisAD,removeeachHPTdiskbeforeexceedingitsapplicablelifelimitasspecifiedintheTLM.(5)InstallanHPTdiskeligibleforinstallation.(t)DefinitionForthepurposeofthisAD,aparteligibleforinstallationisonewithapartnumberlistedintheTLMwithatotalaccumulatedcycliclifethatislessthantheapplicablelifelimitspecifiedintheTLM.(g)AlternativeMethodsofCompliance(AMOCs)TheManager,EngineCertificationOffice,FAA,mayapproveAMOCsforthisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.Youmayemailyourrequestto:ANE-AD-AMOC@faa.gov.8(h)RelatedInformation(1)FormoreinformationaboutthisAD,contactWegoWang,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7134;fax:781-238-7199;email:wego.wang@faa.gov.(2)RefertoMCAIEuropeanAviationSafetyAgencyAD2014-0249R1,datedFebruary18,2015,formoreinformation.YoumayexaminetheMCAIintheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingitinDocketNo.FAA-2015-0593.(3)RRNon-ModificationServiceBulletinNo.RB.211-72-G188,RevisionNo.1,datedOctober30,2013,andRRRB211-535E4-37,TLM:05-10-01-800-000,RevisiondatedJuly1,2014;andRRRB211-535E4-37,TLM:05-00-01-800-000,RevisiondatedJuly1,2014,whicharenotincorporatedbyreferenceinthisAD,canbeobtainedfromRolls-Royceplc,usingthecontactinformationinparagraph(h)(4)ofthisproposedAD.(4)ForserviceinformationidentifiedinthisproposedAD,contactRolls-Royceplc,CorporateCommunications,P.O.Box31,Derby,England,DE248BJ;phone:011-44-1332-242424;fax:011-44-1332-249936;email:http://www.rollsroyce.com/contact/civil_team.jsp;Internet:https://www.aeromanager.com.(5)Youmayviewthisserviceinfom1ationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.9Issued

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