[4910-13-P]DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2014-0561;DirectorateIdentifier2014-NE-12-AD;Amendment39-18105;AD2015-04-03]RIN2120-AA64AirworthinessDirectives;Rolls-RoycepicTurbofanEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Finalrule.SUMMARY:Weareadopting anewairworthinessdirective(AD)forcertainRollsRoycepic(RR)RB211Trent768-60,772-60,and772B-60turbofanengines.ThisADrequiresinspectionoftheoilfeedtubesealingsleeveandremovalofthoseoilfeedtubesealingsleevesthatareaffectedbythisAD.ThisADwaspromptedbyfracturesofthehigh-pressure/intermediate-pressure(HP/IP)turbinesupportinternaloilfeedtube.WeareissuingthisADtopreventfailureoftheHP/IPturbinesupportinternaloilfeedtube,whichcouldresultinuncontainedenginefailureanddamagetotheairplane.DATES:ThisADbecomeseffective[fNSERTDATE35DAYSAFTERDATEOFPUBLICATIONfNTHEFEDERALREGISTER).ADDRESSES:SeetheForFurtherInformationContactsection.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2014-0561;orinpersonattheDocketManagementFacilitybetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisAD,themandatorycontinuingairworthinessinformation(MCAI),theregulatoryevaluation,anycommentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isDocumentManagementFacility,U.S.DepartmentofTransportation,DocketOperations,M-30,WestBuildingGroundFloor,RoomW12-140,1200NewJerseyAvenueSE.,Washington,DC20590.FORFURTHERINFORMATIONCONTACT:WegoWang,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7134;fax:781-238-7199;email:wego.wang@faa.gov.SUPPLEMENTARYINFORMATION:DiscussionWeissuedanoticeofproposedrulemaking(NPRM)toamend14CFRpart39byaddinganADthatwouldapplytothespecifiedproducts.TheNPRMwaspublishedintheFederalRegisteronSeptember18,2014(79FR56025).TheNPRMproposedtocorrectanunsafeconditionforthespecifiedproducts.TheMCAIstates:Therehavebeennineoccurrencesofhighoilconsumption,causedbyfractureoftheHigh/IntermediatePressure(HP/IP)turbinesupportinternaloil feedtubePartNumber(PIN)FW45909.TheoilfeedtubethreadedendadaptorandsealingsleevePINFW15003aredesignedtoformaslidingjointwhich,ifrestrained,cancompresstheoil feedtubeduringthermalcontractionoftheturbinecasingattheendoftheflightcycle.Oneachsubsequentflight,thethermalgrowthandcontractionoftheturbinecasingrelativetotheoiltube,duringtheheatingandcoolingphasesofthe2flightcycle,applyaloadcycletothetube,whichmayleadtolowcyclefatiguefracture.CommentsWegavethepublictheopportunitytoparticipateindevelopingthisAD.WereceivednocommentsontheNPRM(79FR56025,September18,2014).ConclusionWereviewedtheavailabledataanddeterminedthatairsafetyandthepublicinterestrequireadoptingthisADasproposed.CostsofComplianceWeestimatethatthisADaffects69enginesinstalledonairplanesofU.S.registry.Wealsoestimatethatitwilltakeabout8.5hoursperenginetocomplywiththisAD.Theaveragelaborrateis$85perhour.Basedonthesefigures,weestimatethecostofthisADonU.S.operatorstobe$49,853.AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency'sauthority.Weareissuingthisrulemakingundertheauthoritydescribedin"SubtitleVII,PartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthority3becauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWedeterminedthatthisADwillnothavefederalismimplicationsunderExecutiveOrder13132.ThisADwillnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalgovernmentand theStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,IcertifythisAD:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)WillnotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,Incorporationbyreference,Safety.AdoptionoftheAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAamends14CFRpart39asfollows:PART39-AIRWORTHINESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.4§ 39.13

[A

m ended

] 2. The FAA amends

§

3 9.13

by adding

the following

new airworthiness

directive (AD): 2015

- 04-03

Roll

s -Ro

yce

pic

: Amendment

39-181

05; Docket

No.

F AA

- 20 14-0561; Dir ectorate

Id entifier 2014-NE-12-AD. (a) Effective

Date This

AD becomes

effective

(INSERT

DATE

35 DAYS AFTER

DATE

OF PUBLICATION

IN THE FEDERAL

R EGfSTER]. ( b

) Affected

A

D

s None. (c) Applicability This

AD applies

to

R olls-Royce

pic (RR) RB211

Trent 768-60, 772-60,

and 772 B-60 turbofan

eng ines

, serial numbers

41693 through

42309

in clusive,

42313,

42318, 42319

, 42320,

42328,

and 42330

w ith high-pressure

/ intern1ediate-pressure

(HPIIP) turbine

support

internal

oil feed

tube

seal

in

g sleeve,

part number

( P IN)

FW 15003, installed,

that

is marked

with

the prefix

"BIN" followed

by

a six digit batch number

and does

not contain

the marking

102013

, 112013

or 102013L. (d) Reason

Thi

s AD

was prompted

by fractures

of the

HP

/ IP turbine

support

internal

oil feed tube.

We

are

i ss uing

this

AD

to prevent

failure

of the

HP

/ IP turbine

s upport internal

oil feed

tube

, which

could

result

in uncontained

engine

failure

and damage

to the airplane. (e) Actions

and

Co mpliance Comply

with

this

AD within

the compliance

times specified,

unless already

done. 5(1)Within6monthsaftertheeffectivedateofthisAD,performon-wingorinshopinspectionfor,andremovefromservice,anyaffectedHP/IPturbinesupportinternaloilfeedtubesealingsleeve.(2)RemovefromserviceanyHP/IPturbinesupportinternaloilfeedtubesealingsleeveonwhichmarkingscannotbesufficientlyidentifiedtodeterminewhethersaidsealingsleeveispartoftheaffectedpopulation.(3)FromtheeffectivedateofthisAD,youmayinstallonenginesHP/IPturbinesupportinternaloilfeedtubesealingsleeves,PINFW15003,thataremarkedwiththeprefix"BIN"followedbyasixdigitbatchnumber,providedthatthepartismarkedwith102013, 112013,or102013L.(f)AlternativeMethods ofCompliance(AMOCs)TheManager,EngineCertificationOffice,FAA,mayapproveAMOCstothisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.Youmayemailyourrequestto:ANE-AD-AMOC@faa.gov.(g)RelatedInformation(I)FormoreinformationaboutthisAD,contactWegoWang,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7134;fax:781-238-7199;email:wego.wang@faa.gov.(2)RefertoMCAIEuropeanAviationSafetyAgencyAD2014-0168,datedJuly16,2014,formoreinformation.YoumayexaminetheMCAIintheADdocketontheInternetathttp://www.regulations.gov/#!docketDetail;D=FAA-2014-0561.6(h) Material Incorporated

by Reference None. I ssued

in Burlington

, Massachusetts

, on February

11

, 2015. l **i~tLfl~**

n

.. 111

n **l-lUu~,~ttt·~**

**~** Colleen

M.

D' Alessandro, Assistant Directorate

Manager,

Engine

& Propeller Directorate

, Aircraft Certification

Service.

7