DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2015-3778;DirectorateIdentifier2015-NE-27-ADlRIN2120-AA64AirworthinessDirectives;Rolls-RoycepicTurbofanEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Noticeofproposedrulemaking(NPRM).[4910-13-P]SUMMARY:Weproposetoadoptanewairworthinessdirective(AD)forallRollsRoycepic(RR)RB211-535E4-37,RB211-535E4-B-37,andRB211-535E4-C-37turbofanengines.ThisproposedADwaspromptedbyareviewofoperationaldatathatdeterminedcertainRRRB211-535E4-37engineshavebeenoperatedtoamoresevereflightprofile thanisconsistentwiththeflightprofileusedtoestablishthecycliclifelimitsfortherotatingparts.ThisproposedADwouldrequirerecalculatingthecycliclifeforcertainenginelife-limitedrotatingpartsandremovingthosepartsthathaveexceededtheircycliclifelimitwithinspecifiedcompliancetimes.WeareproposingthisADtopreventfailureoflife-limitedrotatingparts,whichcouldresultinuncontainedpartsrelease,damagetotheengine,anddamagetotheairplane.DATES:WemustreceivecommentsonthisproposedADby[INSERTDATE30DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].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,contactRolls-Roycepic,CorporateCommunications,P.O.Box31,Derby,England,DE24phone:011-44-1332-242424;fax:011-44-1332-249936;email:http://www.rollsroyce.com/contact/civil_team.jsp;Intemet:https://customers.rollsroyce.com/public/rollsroycecare.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ExaminingtheADDocketYoumayexaminetheADdocketontheIntemetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-3778;orinpersonattheDocketOperationsofficebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,themandatorycontinuingairworthinessinformation(MCAI),theregulatoryevaluation,anycommentsreceived,2andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt.FORFURTHERfNFORMATIONCONTACT:RobertGreen,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7754;fax:781-238-7199;email:robert.green@faa.gov.SUPPLEMENTARYINFORMATION:CommentsInvitedWeinviteyoutosendanywrittenrelevantdata,views,orargumentsaboutthisproposedAD.SendyourcommentstoanaddresslistedundertheADDRESSESsection.Include"DocketNo.FAA-2015-3778;DirectorateIdentifier2015-NE-27-AD"atthebeginningofyourcomments.Wespecificallyinvitecommentsontheoverallregulatory,economic,environmental,andenergyaspectsofthisproposedAD.WewillconsiderallcommentsreceivedbytheclosingdateandmayamendthisproposedADbasedonthosecomments.Wewillpostallcommentswereceive,withoutchange,tohttp://www.regulations.gov,includinganypersonalinformationyouprovide.WewillalsopostareportsummarizingeachsubstantiveverbalcontactwithFAApersonnelconcerningthisproposedAD.DiscussionTheEuropeanAviationSafetyAgency(EASA),whichistheTechnicalAgentfortheMemberStatesoftheEuropeanCommunity,hasissuedEASAAD2015-0148,dated3July23,2015(correctedJuly24,2015),referredtohereinafteras"theMCAI",tocorrectanunsafeconditionforthespecifiedproducts.TheMCAIstates:AreviewofoperationalflightdatahasrevealedthatsomeRB211-535enginesmayhavebeenoperatedbeyondtheflightprofile(FP)assumedbytheoperatorwhenestablishingtheoperationallimits(lifelimits)withinwhichthecorrespondingcriticalpartsareallowedtoremaininstalled.Thiscondition,ifnotcorrected,mayleadtocriticalpartfailure,possiblyresultinginreleaseofhighenergydebris,damagetotheaeroplaneand/orinjurytotheoccupants.Toprecludefailureofanenginelife-limitedpart,theMCAIspecifies,andthisproposedADwouldrequire,recalculatingthecycliclifeforcertainparts,andremovingfromservicethosepartsthathaveexceededtheircycliclifelimitwithinspecifiedcompliancetimes.ThisproposedADwouldestablishanewdefaultFlightProfileGforRB211-535E4-37enginelife-limitedparts.If,however,operatorsmeettherequirementsofAppendix6ofRRAlertNon-ModificationServiceBulletin(NMSB)No.RB.211-72-AH972,Revision3,datedAugust28,2015,theymayoperatetoFlightProfileAorB.YoumayobtainfurtherinformationbyexaminingtheMCAIintheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA2015-3778.RelatedServiceInformationunder1CFRPart51RRhasissuedAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015.TheNMSBdescribesanewflightprofile,theconsumedcycliclifecorrectionsforprioroperationofaffectedparts,andtheremovalfromservicerecommendationsforpartsthathaveexceededtheircycliclifelimit.Thisserviceinformationisreasonablyavailable4becausetheinterestedpartieshaveaccesstoitthroughtheirnormalcourseofbusinessorbythemeansidentifiedintheADDRESSESsectionofthisNPRM.FAA'sDeterminationandRequirementsofThisProposedADThisproducthasbeenapprovedbytheaviationauthorityoftheUnitedKingdomandisapprovedforoperationintheUnitedStates.PursuanttoourbilateralagreementwiththeEuropeanCommunity,EASAhasnotifiedusoftheunsafeconditiondescribedintheMCAIandserviceinformationreferencedabove.WeareproposingthisADbecauseweevaluatedallinformationprovidedbyEASAanddeterminedtheunsafeconditionexistsandislikelytoexistordeveloponotherproductsofthesametypedesign.ThisproposedADwouldrequirerecalculationoftheremainingcycliclifefortheaffectedenginelife-limitedpartsandremovalfromserviceofpartsthatexceedtheircycliclifelimit.CostsofComplianceWeestimatethatthisproposedADaffects107enginesinstalledonairplanesofU.S.registry.Pro-ratedcostofthelostcycliclifeasaresultofthecorrectionswouldbeabout$25,417,324.Weestimateitwilltake1hourtorecalculatetheconsumedcycliclifeandrevisetheenginerecords.Theaveragelaborrateis$85perhour.Basedonthesefigures,weestimatethecostofthisproposedADonU.S.operatorstobe$25,426,419.AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency'sauthority.5Weareissuingthisrulemakingundertheauthoritydescribedin"SubtitleVII,PartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWedeterminedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythisproposedregulation:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)WiIInotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,Incorporationbyreference,Safety.6TheProposedAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAproposestoamend14CFRpart39asfollows:PART39-AIRWORTHINESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.§39.13[Amended]2.TheFAAamends§39.13byaddingthefollowingnewairworthinessdirective(AD):Rolls-Roycepic:DocketNo.FAA-2015-3778;DirectorateIdentifier2015-NE-27-AD.(a)CommentsDueDateWemustreceivecommentsby(INSERTDATE30DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].(b)AffectedADsNone.(c)ApplicabilityThisADappliestoallRolls-Royceplc(RR)RB211-535E4-37,RB211-535E4-B-37,andRB211-535E4-C-37turbofanengines.(d)ReasonThisADwaspromptedbyareviewofoperationaldatathatdeterminedthatcertainRRRB211-535E4-37engineshavebeenoperatedtoamoresevereflightprofilethanisconsistentwiththeflightprofileusedtoestablishthecycliclifelimitsfortherotatingparts.WeareissuingthisADtopreventfailureoflife-limitedrotatingparts,7whichcouldresultinuncontainedpartsrelease,damagetotheengine,anddamagetotheairplane.(e)ActionsandComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.Within21daysaftertheeffectivedateofthisAD:(1)ForRRRB211-535E4-37engines,establishanewflightprofile,FlightProfileG,asthenewdefaultprofileforflightoperationsandnewpartlivesforlife-limitedparts.(i)UseAppendix6ofRRAlertNon-ModificationServiceBulletin(NMSB)No.RB.211-72-AH972,Revision3,datedAugust28,2015,todefineFlightProfileG.(ii)UsethedefinitionofFlightProfileGinAppendix6andthemaximumapprovedcycliclivesinAppendix2ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,toidentifythenewlivesforlife-limitedparts.(iii)IfoperatorsmeettherequirementsofAppendix6ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,theymayoperatetoFlightProfileAorB.(2)ForallRB211-535E4-37,RB211-535E4-B-37,andRB211-535E4-C-37engines,determineifanypartidentifiedbypartnumberandserialnumberinAppendix4ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,isinstalledontheengine.(i)Donotreturntoserviceanyenginewithapartidentifiedinparagraph(e)(2)ofthisADafterthepartreachesthe"ComplianceTime"dateorcycles,whicheveroccursfirst,asspecifiedinAppendix4ofRRAlertNMSBNo.RB.211-72-AJ-1972,Revision3,datedAugust28,2015.8(ii)Foreachpartidentifiedinparagraph(e)(2)ofthisADwithouta"ComplianceTime"thathasalifingcorrectionidentified,applythelifingcorrectionforeachpartusingthe"AdditionalLifeConsumedFlightCycles"specifiedinAppendix4ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015.(3)ForRB211-535E4-37enginesoperatedtoFlightProfileGwithpartslistedinAppendix4ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,dothefollowing:(i)Re-calculatetheconsumedcycliclifeofthelow-pressure(LP)compressorshaft,LPturbineshaft,LPturbinediskStage2,intermediate-pressurecompressorrotorshaftStage1to6,high-pressure(HP)compressorrotordiskStage1and2,HPcompressorrearrotorshaftassembly,andHPturbinediskasfollows.(ii)DeterminetheFlightProfileGcyclesinservice(CIS).CountallCISaccumulatedsinceApril1,2015,inclusive.(iii)UsetheFlightProfileGcyclesinservicefromparagraph(e)(3)(ii)ofthisAD,themaximumapprovedlivesinAppendix2ofRRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,andFigure1toparagraph(e)ofthisADtocalculatethenewconsumedcycliclives.9Figure1toParagraph(e),CalculationstoMoveGroup'A'andGroup'B'PartsBetweenEngineMarksand/orFlightProfilesStep(a)Calculatethelraclionofthecomponentslifeused(FLU)IneadloftheoriginalEngrnoMarks(EM)orffightprofiles(FP)FLU1QFLUn=CyclesIn1stEMorFP1StEM()(FPDeclaredUleCyclesin2ndEMorFP2ndEMorFPDeclaredLifeCyclesInnthEMorFPnihEMorFPDeclaredUteContinueunt11111eFLUhasbeencalculated!()(allEngineMarllsandflightprofilesInwtlldlthecomponenthasbeenoperatedStep(b)CalculatethetotaltractionofIHeu$00(TFLU)Trt.U=FLU1+FLU2+......+FLUnStep(c)Calculate&quiVatentcyclessincenew(CSN)forthecomponentrnthenBWEngineMarkorfttghtprofileEquivalentCSN"TFLUxDeol&edLHe'"thenewEnganeMarkorprofile(d)IIroquarod,oo.lcubtothooyolooremainingtothoOoclurodLitoInthonowEngllloMarkorflightprofileCyclesremaining=DectruedLifeinthanuwEnotnaMarkorflightprofile-EquivalentCSN(f)AlternativeMethodsofCompliance(AMOCs)TheManager,EngineCertificationOffice,FAA,mayapproveAMOCsforthisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.Youmayemailyourrequestto:ANE-AD-AMOC@faa.gov.(g)RelatedInformation(1)FormoreinformationaboutthisAD,contactRobertGreen,AerospaceEngineer, EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7754;fax:781-238-7199;email:robert.green@faa.gov.(2)RefertoMCAlEuropeanAviationSafetyAgencyAD2015-0148,datedJuly23,2015(CorrectedJuly24,2015),formoreinformation.YoumayexaminetheMCAI10intheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingitinDocketNo.FAA-2015-3778.(3)RRAlertNMSBNo.RB.211-72-AH972,Revision3,datedAugust28,2015,andTask05-00-01-800-000,"RecordingandControloftheLivesofParts",datedJuly1,2015,oftheRRRB211-535E4TimeLimitsManual(TLM),publicationreferenceT211(535)-6RR,Revision49,datedJuly1,2015,canbeobtainedfromRRusingthecontactinformationinparagraph(g)(4)ofthisproposedAD.(4)ForserviceinformationidentifiedinthisproposedAD,contactRolls-Roycepic,CorporateCommunications,P.O.Box31,Derby,England,DE248BJ;phone:011-44-1332-242424;fax:011-44-1332-249936;email:http://www.rollsroyce.cornlcontactlcivil_team.jsp;Internet:https://customers.rollsroyce.com/public/rollsroycecare.(5)YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.IssuedinBurlington,Massachusetts,onOctober28,2015.Cdlf}tt'-m'j)rli.£.44avtr;,W.ColleenM.D'Alessandro,DirectorateManager,Engine&PropellerDirectorate,AircraftCertificationService.11