DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2012-1331;DirectorateIdentifier2012-NE-44-AD]RIN2120-AA64AirworthinessDirectives;Rolls-RoycepicTurbojetEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Noticeofproposedru1emaking(NPRM).[4910-13-P]SUMMARY:Weproposetosupersedeairworthinessdirective(AD)2013-11-13thatappliestoallRolls-Roycepic(RR)ViperMk.601-22turbojetengines.SinceweissuedAD2013-11-13,RRdeterminedthatadditionalpartsfortheRRViperMk.601-22aswellasadditionalenginemodelsareaffected.ThisproposedADwouldaddtwonewenginemodelsandadditionalenginepartstotheapplicability.WeareproposingthisADtopreventfailureoflife-limitedparts,whichcouldleadtoanuncontainedpartrelease,damagetotheengine,anddamagetotheairplane.DATES:WemustreceivecommentsonthisproposedADby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].ADDRESSES:Youmaysendcomments,usingtheproceduresfollildin14CFR11.43and11.45,byanyofthefollowingmethods:•FederaleRulemakingPortal:Gotohttp://www.regulations.gov.Followtheinstructionsforsubmittingcomments.•Fax:202-493-2251.•Mail:U.S.DepartmentofTransportation,DocketOperations,M-30,WestBuildingGroundFloor,RoomW12-140,1200NewJerseyAvenueSE.,Washington,DC20590.•HandDelivery:DelivertoMailaddressabovebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.ForserviceinformationidentifiedinthisproposedAD,contactDAServicesOperationsRoomatRolls-Royceplc,DefenseSectorBristol,\VH-70,P.O.Box3,Filton,BristolBS347QE,UnitedKingdom;phone:+44(0)1179790700;fax:+44(0)1179795498;email:defence-operations-room@rolls-royce.com.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.Itisalsoavailableontheinternetathttp://www.regnlations.govbysearchingforandlocatingDocketNo.FAA-2012-1331.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2012-1331;orinpersonattheDocketManagementFacilitybetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,themandatorycontinuingairworthinessinformation,regulatoryevaluation,anycommentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt..FORFURTHERINFORMATIONCONTACT:PhilipHaberlen,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7770;fax:781-238-7199;email:philip.haberlen@faa.gov.SUPPLEMENTARYINFORMATION:CommentsInvitedWeinviteyoutosendanywrittenrelevantdata,views,orargumentsaboutthisproposedAD.SendyourcommentstoanaddresslistedundertheADDRESSESsection.2Include"DocketNo.FAA-2012-1331;DirectorateIdentifier2012-NE-44-AD"atthebeginningofyourcomments.Wespecificallyinvitecommentsontheoverallregulatory,economic,environmental,andenergyaspectsofthisNPRM.WewillconsiderallcommentsreceivedbytheclosingdateandmayamendthisNPRlvfbecauseofthosecomments.Wewillpostallcommentswereceive,withoutchange,tohttp://www.regulations.gov,includinganypersonalinformationyouprovide.WewillalsopostareportsummarizingeachsubstantiveverbalcontactwereceiveaboutthisNPRM.DiscussionOnMay28,2013,weissuedAD2013-11-13,Amendment39-17473(78FR34550,June10,2013)("AD2013-11-13"),forallRRViperMk.601-22turbojetengines.AD2013-11-13requiresreducingthelifeofcertaincriticalparts.AD2013-11-13resultedfromareviewbyRRofthelivesoftheseparts.WeissuedAD2013-11-13topreventfailureoflife-limitedparts,whichcouldleadtoanuncontainedpartrelease,damagetotheengine,anddamagetotheairplane.ActionsSinceAD2013-11-13WasIssuedSinceweissuedAD2013-11-13,RRdeterminedthatadditionalpartsontheViperJvfk.601-22enginemodelandtheViperMk.521andMk.522enginemodelsexperiencedthesameunsafecondition.AlsosinceweissuedAD2013-11-13,theEuropeanAviationSafetyAgencyhasissuedAD2015-0127Rl,datedAugust14,2015,whichrequiresreducingthecycliclifelimitsoftheaffectedparts.RelatedServiceInformationunder1CFRPart51WereviewedRRAlertServiceBulletin(ASB)Mk.521Number72-A408,CirculationA,datedJanuary2015;ASBMk.521Number72-A408,CirculationB,datedJanuary2015;ASBMk.522Number72-A413,CirculationA,datedJanuary2015;ASB3Mk.522Number72-A412,CirculationB,datedJanuary2015;andASBMk.601-22Number72-A207,datedJanuary2015.Theserviceinformationdescribesproceduresfordeterminingapplicablepartnumbers andrevisedcycliclifelimits.ThisserviceinformationisreasonablyavailablebecausetheinterestedpartieshaveaccesstoitthroughtheirnormalcourseofbusinessorbythemeansidentifiedintheADDRESSESsectionofthisNPRM.FAA'sDeterminationWeareproposingthisADbecauseweevaluatedalltherelevantinformationanddeterminedthellllsafeconditiondescribedpreviouslyislikelytoexistordevelopinotherproductsofthesametypedesign.ProposedADRequirementsThisNPRMwouldrequireaccomplishingtheactionsspecifiedintheserviceinformationdescribedpreviously.ThisNPRMwouldaddtwoenginemodelsandadditionalaffectedpartstotheapplicabilityofAD2013-11-13.CostsofComplianceWeestimatethatthisproposedADwillaffectabout46enginesinstalledonairplanesofU.S.registry.Wealsoestimateaproratedparts costof$66,000perengine.Wealsoestimatethatitwouldtakeabout4hoursperenginetocomplywiththisproposedAD.Theaveragelaborrateis$85perhour.Basedonthesefigures,weestimatethecostofthisproposedADonU.S.operatorstobe$3,051,640.AuthorityforthisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,Section106,describestheauthorityoftheFAAAdministrator.SubtitleVII,AviationPrograms,describesinmoredetailthescopeoftheAgency'sauthority.4WeareissuingthisrulemakingundertheauthoritydescribedinSubtitleVII,PartA,SubpartIII,Section44701,"Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWehavedeterminedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovenunentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythattheproposedregulation:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)WillnotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,Incorporationbyreference,Safety.TheProposedAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAproposestoamend14CFRpart39asfollows:5PART39-AIRWORTIDNESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.§39.13[Amended]2.TheFAAamends§39.13byremovingairworthinessdirective(AD)2013-11-13,Amendment39-17473(78FR34550,June10,2013)("AD2013-11-13"),andaddingthefollowingnewAD:Rolls-Royceplc(TypeCertificatepreviouslyheldbyRolls-Royce(1971)Limited,BristolEngineDivision):DocketNo.FAA-2012-1331;DirectorateIdentifier2012-NE44-AD.(a)CommentsDueDateWemustreceivecommentsby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].(b)AffectedADsThisADsupersedesAD2013-11-13.(c)ApplicabilityThisADappliestoallRolls-Royceplc(RR)ViperMk.521,ViperMk.522,andViperMk.601-22turbojetengines.(d)UnsafeConditionThisADwaspromptedbyareviewbyRRofthelivesofcertaincriticalparts.WeareissuingthisADtopreventfailureoflife-limitedparts,whichcouldleadtoanuncontainedpartrelease,damagetotheengine,anddamagetotheairplane.(e)ComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.(1)Within30daysaftertheeffectivedateofthisAD,orbeforeanyaffectedpartexceedsitsnewrevisedlifelimit,whicheveroccurslater,removeanyenginefrom6service.UseTableIofRRAlertServiceBulletin(ASB)Mk.521Number72-A408,CirculationA,datedJanuary2015;ASBMk.521Number72-A408,CirculationB,datedJanuary2015;ASBMk.522Number72-A413,CirculationA,datedJanuary2015;ASBMk.522Number72-A412,CirculationB,datedJanuary2015;andASBMk.601-22Number72-A207,datedJanuary2015,todeterminethenewlifelimits.(2)FortheRRViperlvfk.601-22turbojetengine,removecompressorshaft,partnumberV900766,beforethecompressorshaftaccumulates20,720flightcyclessincenew.(f)InstallationProhibitionAftertheeffectivedateofthisAD,donotinstallanyaffectedpartidentifiedinparagraph(e)ofthisADintoanyengine,norreturnanyenginetoservicewithanyaffectedpartidentifiedinparagraph(e)ofthisADinstalled,ifanyaffectedpartexceedsthelifelimitspecifiedintheappropriateASBidentifiedinparagraph(e)(1)and/orthelifelimitidentifiedinparagraph(e)(2)ofthisAD.(g)AlternativeMethodsofCompliance(AMOCs)TheManager,EngineCertificationOffice,mayapproveAMOCsforthisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.Youmayemailyourrequestto:ANE-AD-AMOC@faa.gov.(h)RelatedInformation(1)FormoreinformationaboutthisAD,contactPhilipHaberlen,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7770;fax:781-238-7199;email:philip.haberlen@faa.gov.(2)RefertoMCAIEuropeanAviation SafetyAgencyAD2015-0127R1,datedAugust14,2015,formoreinformation.YoumayexaminetheMCAIintheADdocket7ontheInternetathttp://WW\V.regulations.govbysearchingforandlocatingDocketNo.FAA-2012-1331.(3)RRASBMk.521Number72-A408,CirculationA,datedJanuary2015;ASBMk.521Number72-A408,CirculationB,datedJanuary2015;ASBMk.522Number72-A413,CirculationA,datedJanuary2015;ASBMk.522Number72-A412,CirculationB,datedJanuary2015;andASBMk.601-22Nmnber72-A207,datedJanuary2015,canbeobtainedfromRR,usingthecontactinformationinparagraph(h)(4)ofthisproposedAD.(4)ForserviceinformationidentifiedinthisAD,contactDAServicesOperationsRoomatRolls-Royceplc,DefenseSectorBristol,WH-70,P.0.Box3,Filton,BristolBS347QE,UnitedKingdom;phone:+44(0)1179790700;fax:+44(0)1179795498;email:defence-operations-room@rolls-royce.com.(5)YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.IssuedinBurlington,Massachusetts,onOctober2,2015.ColleenM.D'Alessandro,DirectorateManager,Engine&PropellerDirectorate,AircraftCertificationService.8