DEPARTMENT

OF TRANSPORTATION Federal Aviation Administration 14 CFR

Part

39 [Docket

No.

F AA-2006-23706;

Directorate

Identifier 2006-NE-03-AD] RIN 2120-AA64

[4910-13-P[ Airworthiness

Directives;

Honeywell International

Inc. Turboprop

Engines AGENCY:

Federal Aviation Administration

(FAA),

DOT. ACTION:

Notice

of proposed rulemaking

(NPRM). SUMMARY:

We propose

to supersede airworthiness

directive

(AD) 2015w12-04,

which applies

to

all Honeywell International

Inc. (Honeywell)

TPE331-l,

-2, -2UA,

-3U, -3UW, -5, -SA, -SAB,

-SB,

-6, -6A,

-10, -IOAV,

-IOGP,

-IOGT,

-lOP,

-lOR,

-lOT,

-IOU, -IOUA, -IOUF,

-IOUG, -IOUGR,

-lOUR,

-11

U, -12JR, -12UA, -12UAR,

and -12UHR turboprop engines

with certain Woodward

fuel control

Wlit (FCU) assemblies,

installed.

AD 2015- 12-04 currently

requires

initial

and repetitive dimensional

inspections

of the affected

fuel control

drives

and insertion

of certain airplane operating procedures

into

the applicable flight manuals.

This proposed

AD would correct compliance requirements

and relax

the inspection

interval.

We

are proposing

this

AD

to prevent

failure

of the

fuel control

drive, damage

to the engine,

and damage

to the airplane. DATES:

We must receive comments

on this proposed

AD

by [INSERT

DATE

60 DAYS AFTER

DATE

OF PUBLICATION

IN THE FEDERAL REGISTER]. ADDRESSES:

You

may send comments,

using

the procedures

fmmd

in

14 CFR

11.43 and 11.45,

by any ofthe following

methods: • Federal eRulernaking

Portal:

Go

to http://www.regulations.gov.

Follow

the instructions

for submitting

comments. • Fax: 202-493-2251.•Mail:U.S.DepartmentofTransportation,DocketOperations,M-30,WestBuildingGroundFloor,RoomWl2-140,1200NewJerseyAvenueSE.,Washington,DC20590.•HandDelivery:DelivertoMailaddressabovebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.Forserviceinformationidentifiedinthisproposed AD,contactHoneywellInternationalInc.,111S.34thStreet,Phoenix,AZ85034-2802;phone:800-601-3099;Intemet:https://myaerospace.honeywell.com/wps/portal.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,1200DistrictAvenue,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ItisalsoavailableontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2006-23706.ExaminingtheADDocketYoumayexaminetheADdocketontheIntemetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2006-23706;orinpersonattheDocketManagementFacilitybetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,theregulatoryevaluation,anycommentsreceived,andotherinformation.ThestreetaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt.FORFURTHERINFORMATIONCONTACT:JosephCosta,AerospaceEngineer,LosAngelesAircraftCertificationOffice,FAA,TransportAirplaneDirectorate,3960ParammmtBlvd.,Lakewood,CA90712-4137;phone:562-627-5246;fax:562-627-5210;email:joseph.costa@faa.gov.2SUPPLEMENTARYINFORMATION:CommentsInvitedWeinviteyoutosendanywrittenrelevantdata,views,orargumentsaboutthisNPRM.SendyourcommentstoanaddresslistedundertheADDRESSESsection.Include"DocketNo.FAA-2006-23706;DirectorateIdentifier2006-NE-03-AD"atthebeginningofyourcomments.Wespecificallyinvitecommentsontheoverallregulatory,economic,enviromnental,andenergyaspectsofthisNPRM.WewillconsiderallcommentsreceivedbytheclosingdateandmayamendthisNPRMbecauseofthosecomments.Wewillpostallcommentswereceive,withoutchange,tohttp://www.regulations.gov,includinganypersonalinformationyouprovide.WewillalsopostareportsummarizingeachsubstantiveverbalcontactwereceiveaboutthisNPRM.DiscussionOnJune5,2015,weissuedAD2015-12-04,Amendment39-18177,(80FR34534,June17,2015)("AD2015-12-04"),forallHoneywellInternationallnc.TPE331-l,-2,-2UA,-3U,-3UW,-5,-SA,-SAB,-SB,-6,-6A,-10,-lOAV,-lOOP,-lOOT,-lOP,-lOR,-lOT,-lOU,-lOUA,-lOUF,-lOUG,-lOUGR,-lOUR,-llU,-12JR,-12UA,-12UAR,and-12UHRturbopropengineswithcertainWoodwardFCUassemblies,installed.AD2015-12-04requiresinitialandrepetitivedimensionalinspectionsoftheaffectedfuelcontroldrivesandinsertionofcertainairplaneoperatingproceduresintotheapplicableflightmanuals.AD2015-12-04resultedfromreportsoflossofthefuelcontroldrive,leadingtoengineoverspeed,overtorque,overtemperature,tmcontainedrotorfailure,andasymmetricthrustinmulti-engineairplanes.WeissuedAD2015-12-04topreventfailureofthefuelcontroldrive,damagetotheengine,anddamagetotheairplane.3ActionsSinceAD2015-12-04WasIssuedWereceivedarequesttochangecompliancetimefrom50hoursto100hoursforfuel-controlpartnumbersaffectedbyparagraph(e)(2)ofthisAD.Weconcludedthatbecausethenumberoffuelcontroldrivesin-servicethathadnotcompletedaninitialinspectionwassmall,changingthecompliancetimeto100hourswouldnotaddadditionalriskoffuelcontroldrivefailureand,therefore,isappropriate.Wealsoreceivedreportsthatsomeairplanesdonotusetheconditionlevertoshutdowntheengine,andsocouldnotcomplywiththeAD.Weconcludedthatreferencestoaconditionleverwereinappropriate.ThisproposedADeliminatesreferencestoaconditionlever.RelatedServiceInformationWereviewedHoneywellOperatingInformationLetter(OIL)01331-12R6,datedMay26,2009,formulti-engineairplanes;andOIL01331-18R4,datedMay26,2009,forsingle-engineairplanesandHoneywellTPE331maintenancemanuals.Theserviceinformationdescribesproceduresforconductingfuelcontroldriveinspectionsandengineshutdown.FAA'sDeterminationWeareproposingthisNPRMbecauseweinformationevaluatedalltherelevantanddeterminedtheunsafeconditiondescribedpreviouslyislikelytoexistordevelopinotherproductsofthesametypedesign.ProposedADRequirementsThisNPRMwouldincreasetheinspectiontimelimitsfortheFCUassemblyfrom50to100hours-in-serviceinComplianceparagraph(e)(2)ofthisAD.ThisNPRMwouldalsodeletereferencetotheconditionlever.4CostsofComplianceWeestimatethatthisproposedADaffects2,250enginesinstalledonairplanesofU.S.registry.Wealsoestimate thatitwouldtakeabout8hoursperenginetocomplywiththisproposedAD.Theaveragelaborrateis$85perhour.Weestimatethat10%ofaffectedengineswillrequireFCUassemblystubshaftreplacementandfuelpumporfuelcontrolrepair.Wealsoestimatethatrepairswillcostabout$10,000perengine.Basedonthesefigures,weestimatethecostofthisADonU.S.operatorstobe$525,587peryear.AuthorityforthisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,Section106,describestheauthorityoftheFAAAdministrator.SubtitleVII,AviationPrograms,describesinmoredetailthescopeoftheAgency'sauthority.WeareissuingthisrulemakingundertheauthoritydescribedinSubtitleVII,PartA,SubpartIII,Section44701,"Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWehavedeterminedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythattheproposedregulation:5(I)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:PART39-AIRWORTHINESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.§39.13[Amended]2.TheFAAamends§39.13byremovingairworthinessdirective(AD)2015-12-04,Amendment39-18177(80FR34534,Jtme17,2015)("AD2015-12-04"),andaddingthefollowingnewAD:HoneywellInternationalInc.:DocketNo.FAA-2006-23706;DirectorateIdentifier2006-NE-03-AD.(a)CommentsDueDateTheFAAmustreceivecommentsonthisADactionby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].(b)AffectedADsThisADreplacesAD2015-12-04.6(c)ApplicabilityThisADappliestoallHoneywellInternationalInc.(Honeywell)TPE331-1,-2,-2UA,-3U,-3UW,-S,-SA,-SAB,-SB,-6,-6A,-10,-IOAV,-IOGP,-IOGT,-lOP,-lOR,-lOT,-lOU,-lOUA,-lOUF,-lOUG,-lOUGR,-lOUR,-l!U,-12JR,-12UA,-12UAR,and-12UHRturbopropengineswithWoodwardfuelcontrolunit(FCU)assemblieswithHoneywellpartnumbers(PINs)aslistedinTable1toparagraph(c)ofthisAD,installed.Table1toParagraph(c)-AffectedFCUAssemblyPINsGroup#I234sEngineTPE331-l,-2,and-2UATPE331-1,-2,and-2UATPE331-3U,-3UW,-S,-SA,-SAB,-SB,-6,-6A,-IOAV,-lOGP,-IOGT,-lOP,and-lOTTPE331-3U,-3UW,-S,-SB,-6,-6A,and-IOTTPE331-10,-lOR,-lOU,-IOUA,-lOUF,-lOUG,-IOUGR,-lOUR,-l!U,-12JR,-12UA,-12UAR,and-12UHR(d)UnsafeConditionFCUAssemblyPINsPIN869199-13,-20,-21,-22,-23,-24,-2S,-26,-27,-28,-29,-31,-32,-33,-34,and-3SPIN869199-9,-10,-11,-12,-14,-16,-17,and-18PIN893S61-7,-8,-9,-10,-11,-14,-IS,-16,-20,-26,-27,-29;andPIN897770-1,-3, -7, -9,-10,-11,-12,-14,-IS,-16,-2S,-26,and-28PIN893S61-4,-S,-12,-13;andPIN897770-S,-8,and-13PIN89737S-2,-3,-4,-5,-8,-9,-10,-11,-12,-13,-14,-IS,-16,-17,-19,-21,-24,-25,-26,-27;andPIN897780-1,-2,-3,-4,-S,-6,-7,-8,-9,-10,-II,-14,-15, -16,-17,-18, -19,-20,-21,-22,-23,-24,-2S,-26,-27,-30,-32,-34,-36,-37,-38;andPIN893S61-17,-18,and-19ThisADwaspromptedbyreportsoflossofthefuelcontroldrive,leadingtoengineoverspeedandenginefailure.WeareissuingthisADtopreventfailureofthefuelcontroldrive,damagetotheengine,anddamagetotheairplane.(e)ComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.7(1)InspectionofEngineswithFCUAssemblyPINsinGroups2or4ForFCUassemblyP/NsinGroups2or4listedinTable1toparagraph(c)ofthisAD:(i)Atthenextscheduledinspectionofthefuelcontroldrive,orwithin500hoursin-service(HIS)aftertheeffectivedateofthisAD,whicheveroccursfirst,inspectthefuelcontroldriveforwear.(ii)Thereafter,re-inspectthefuelcontroldrivewithinevery1,000HISsince-lastinspection(SLI).(2)InspectionofEngineswithFCUPINsinGroups1,3,or5ForFCUassemblyPINsinGroups1,3,orSlistedinTable1toparagraph(c)ofthisAD:(i)IfontheeffectivedateofthisADtheFCUassemblyhas900ormoreHISSLI,inspectthefuelcontroldriveforwearwithinI00HISaftertheeffectivedateofthisAD.(ii)IfontheeffectivedateofthisADtheFCUassemblyhasfewerthan900HISSLI,inspectthefuelcontroldriveforwearwithin1,000HIS.(iii)Thereafter,re-inspectthefuelcontroldriveforwearwithinevery1,000HISSLI.(3)AirplaneOperatingProceduresWithin60daysaftertheeffectivedateofthisAD,inserttheinfonnationinFigure1toparagraph(e)ofthisAD,intotheEmergencyProceduresSectionoftheapplicableAirplaneFlightManual(AFM),PilotOperatingHandbook(POH),ortheManufacturer'sOperatingManual(MOM).8Figure1toParagraph(e)-AirplaneOperatingProceduresNOTEProceduresindottedlineboxesareimmediateactionitemstobeperformedbythepilotIflightcrew.·--------------------------------------------------------------,''''''''RAPID,UNCOMMANDEDACCELERATIONDURINGENGINESTART(PropellerONStartLocks):•EngineStart-AbortImmediately-ShutDownAffected':EngineinaccordancewithEmergencyProcedures.L--------------------------------------------------------------'WARNINGDonotattempttore-startengine.Rep01ttomaintenance.ONGROUNDorINFLIGHT:-------------------------------------------------------------,RAPID,UNCOMMANDEDINCREASEINRPM,TORQUE,FUELFLOWAND/ORTURBINETEMPERATURE(PropellerOFFStartLocks)•IdentifyMalfunctioningEngine(multi-engineairplanes)-Crosscheckforhightorque,RPM,fuelflow,andturbinetemperatures.,•'ShutDownAffectedEngineinaccordancewithEmergencyProcedures.''L-------------------------------------------------------------WARNINGNeverretardthepowerleversaftofflightidleinflightorontheground.WARNINGDonotattemptanenginere-start.Reporttomaintenance.(1)OptionalTerminatingActionReplacingtheaffectedFCUassemblywithanFAA-approvedFCUassemblynotlistedinthisADbyPINisterminatingactionfortheinitialandrepetitiveinspectionsrequiredbythisAD,andforinsertingtheinformationinFigure1toparagraph(e)ofthisADintotheAFM,POH,andMOM.(g)DefinitionsForthepurposesofthisAD:9(1)The"fuelcontroldrive"isaseriesofmatingsplineslocatedbetweenthefuelpumpandfuelcontrolgovernor.(2)Thefuelcontroldriveconsistsoffourdrivesplines:thefuelpumpinternalspline,thefuelcontrolexternal"quillshaft"spline,andthestubshaftinternalandexternalsplines.(h)AlternativeMethodsofCompliance(AMOCs)TheManager,LosAngelesAircraftCertificationOffice,FAA,mayapproveAMOCsforthisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.(i)RelatedInformation(1)FormoreinformationaboutthisAD,contactJosephCosta,AerospaceEngineer,LosAngelesAircraftCertificationOffice,FAA,TransportAirplaneDirectorate,3960ParamountBlvd.,Lakewood,CA90712-4137;phone:562-627-5246;fax:562-627-5210;email:joseph.costa@faa.gov.(2)InformationpertainingtooperatingrecommendationsforaffectedenginesafterafuelcontroldrivefailureiscontainedinHoneywellOperatingInformationLetter(OIL)01331-12R6,datedMay26,2009,formulti-engineairplanes;andOIL01331-18R4,datedMay26,2009,forsingle-engineairplanes.InformationonfuelcontroldriveinspectioncanbefoundinSection72-00-00oftheapplicableTPE331maintenancemanuals.TheseHoneywellOILsandtheTPE331maintenancemanualscanbeobtainedfromHoneywellusingthecontactinformationinparagraph(i)(3)ofthisproposedAD.(3)ForserviceinformationidentifiedinthisAD,contactHoneywellInternationalInc.,IllS.34thStreet,Phoenix,AZ85034-2802;phone:800-601-3099;Internet:https://myaerospace.honeywell.com/wps/portal.(4)YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,1200DistrictAvenue,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.10IssuedinBurlington,Massachusetts,onMarch15,2016.AnnC.Mollica,ActingManager,EngineandPropellerDirectorate,AircraftCertificationService.11