DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2015-1383;DirectorateIdentifier2015-NE-15-AD]RIN2120-AA64[4910-13-P]AirworthinessDirectives;TechnifyMotorsGmbHReciprocatingEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Noticeofproposedrulemaking(NPRM).SUMMARY:Weproposetoadoptanewairworthinessdirective(AD)forallTechnifyMotorsGmbHTAE125-02reciprocatingengineswithadualmassflywheelinstalled.ThisproposedADwaspromptedbyreportsofagearboxdriveshaftbreakingduringstartingorrestartingoftheengine.ThisproposedADwouldrequireinstallationofastartphasemonitoringsystemandassociatedspecifiedsoftware.WeareproposingthisADtopreventoverloadandfailureofthegearboxdriveshaft,whichcouldleadtofailureoftheengine,in-flightshutdown,andlossofcontroloftheairplane.DATES:WemustreceivecommentsontllisproposedADby(INSERTDATE60DAYSAFTERDATEOFPUBLICATfONINTHEFEDERALREGISTER].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,contactTechnifyMotorsGmbH,Platanenstrasse14,D-09356SanktEgidien,Germany;phone:+49372046960;fax:+493720469629125;email:info@centurion-engines.com;andDiamondAircraftIndustriesGmbH,N.A.Otto-Strasse5,2700WienerNeustadt,Austria;phone:+43262226700;fax:+432622267001369;email:airworthiness@diamond-air.at.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ItisalsoavailableontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-1383.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-1383;orinpersonattheDocketOperationsofficebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,themandatorycontinuingairworthinessinformation(MCAI),theregulatoryevaluation,anycommentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt.2FORFURTHERINFORMATIONCONTACT: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-2015-1383;DirectorateIdentifier2015-NE-15-AD"atthebeginningofyourcomments.Wespecificallyinvitecommentsontheoverallregulatory,economic,environmental,andenergyaspectsofthisproposedAD.WewillconsiderallcommentsreceivedbytheclosingdateandmayamendthisproposedADbasedonthosecomments.Wewillpostallcommentswereceive,withoutchange,tohttp://www.regulations.gov,includinganypersonalinformationyouprovide.WewillalsopostareportsummarizingeachsubstantiveverbalcontactwithFAApersonnelconcemingthisproposedAD.DiscussionTheEuropeanAviationSafetyAgency(EASA),whichistheTechnicalAgentfortheMemberStatesoftheEuropeanCommunity,hasissuedEASAAD2015-0055,datedMarch31,2015(referredtohereinafteras"theMCAI"),tocorrectanunsafeconditionforthespecifiedproducts.TheMCAlstates:3CasesofabrokengearboxdriveshafthavebeenreportedonaeroplanesequippedwithTAE125-02enginesthathaveaDualMassFlywheelinstalled.Investigationsresultsshowedapossibleoverloadofthegearboxdriveshaftduringstartingoftheengineorduringrestartingoftheenginein-flight.Thiscondition,ifnotcorrected,couldleadtoenginepowerlossduringflight,possiblyresultinginlossofcontroloftheaeroplane.YoumayobtainfurtherinformationbyexaminingtheMCAIintheADdocketontheInternetathttp://www.regulations.govby searchingforandlocatingDocketNo.FAA-2015-1383.RelatedServiceInformationunder1CFRPart51TechnifyMotorsGmbH(typecertificatepreviouslyheldbyThielertAircraftEnginesGmbH)issuedTechnifyMotorsServiceBulletin(SB)No.SBTMG125-1018PI,Revision1,datedFebruary5,2015.Theserviceinformationdescribesproceduresforinstallingastartphasemonitoringsystemandassociatedspecifiedsoftwaremappingonparticularairplanemodels.ThisserviceinformationisreasonablyavailablebecausetheinterestedpartieshaveaccesstoitthroughtheirnonnalcourseofbusinessorbythemeansidentifiedintheADDRESSESsectionofthisNPRM.OtherRelatedServiceInformationTechnifyMotorsGmbHhasalsoissuedTechnifyMotorsSBNo.TMTAE000-0007,Revision28,datedFebruary5,2015;TechnifyMotorsInstallationManualNo.IM02-02,Issue4,Revision2,datedJanuary30,2015,withChapter02-IM-13-02,section13.8.16,Revision1,datedNovember28,2014;TechnifyMotorsSBNo.SBTMG601-1007PI,Revision3,datedFebruary5,2015;andTechnifyMotorsSBNo.SBTMG651-1004Pl,Revision2,datedFebruary5,2015.4DiamondAircraftIndustriesGmbH(DAI)hasissuedDAIMandatoryServiceBulletin(MSB)No.42-109/1,datedFebruary4,2015;andDAIMSBNo.42-007116,datedFebruary4,2015.Theserviceinformationdescribesproceduresforinstallingastartphasemonitoringsystemandassociatedspecifiedsoftwaremapping.FAA'sDeterminationandRequirementsofThisProposedADThisproducthasbeenapprovedbytheaviationauthorityofGermany,andisapprovedforoperationintheUnitedStates.PursuanttoourbilateralagreementwiththeEuropeanCommunity,EASAhasnotifiedusoftheunsafeconditiondescribedintheMCAIandserviceinformationreferencedabove.WeareproposingthisADbecauseweevaluatedallinformationprovidedbyEASAanddetem1inedtheunsafeconditionexistsandislikelytoexistordeveloponotherproductsofthesametypedesign.ThisproposedADwouldrequireinstallationofspecifiedsoftwaremappingandastartphasemonitoringsystem.CostsofComplianceWeestimatethatthisproposedADaffects97enginesinstalledonairplanesofU.S.registry.Wealsoestimatethatitwouldtakeabout3hoursperenginetocomplywiththisproposedAD.Theaveragelaborrateis$85perhour.For13oftheengines,requiredpartscostabout$285perengine.For84oftheengines,requiredpartscostabout$206perengine.Basedonthesefigures,weestimatethecostofthisproposedADonU.S.operatorstobe$45,744.5AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency'sauthority.Weareissuingthisrulemakingundertheauthoritydescribedin"SubtitleVII,PartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWedetenninedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythisproposedregulation:(1)Isnota"significantregulatoryaction''underExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),6(3)WillnotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothavea significanteconomicimpact,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§39.13byaddingthefollowingnewairworthinessdirective(AD):TechnifyMotorsGmbH(TypeCertificatePreviouslyHeldbyThielertAircraftEnginesGmbH):DocketNo.FAA-2015-1383;DirectorateIdentifier2015-NE-15-AD.(a)CommentsDueDateWemustreceivecommentsby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTIfEFEDERALREGISTER].(b)AffectedADsNone.7(c) Applicability

Th

i s AD applies

to Technify

Motors

GmbH

TAE 125-02-99 (commercial designation

CD-l35,

formerly Centurion

2.0)

and

T AE 125-02-114 (commercial designation

CD-155,

formerly Centurion

2.0S) reciprocating

engines,

with

a dual mass flywheel

installed. (d) Reason This

AD

was prompted

by reports

of

a gearbox

drive

shaft breaking

during starting

or restarting

of the engine.

We

are

i ssui

ng this

AD

to prevent overload

and failure of the gearbox

drive

s haft

, which

could

lead

to failure

of the engine, in-flight shutdown, and

loss

of control

of the airplane. (e) Actions

and Compliance Comply

with

this

AD within

the comp

li ance times specified,

unless already

done. Within

II

0 flight

hours

or

at the next scheduled

inspection

after

the effect

i ve date of this AD, whichever

occurs

fust, install

a

s tart phase monitoring

sys tem

and software mapping.

Use Technify

Motors

Service

Bulletin

(SB)

No.

SB TM 125-1018

P1, Revision 1, dated February

5, 2015,

to

do

the installation. (t) Installation

Prohibition After

the effective

date

of this

AD,

do not install

onto

any airplane

any Technify Motors

T AE

1 25-02-99

or

T AE

1 25-02-114 reciprocating

engine

that

is not equipped with

a start phase monitoring

system

and software

mapping. 8(g)AlternativeMethodsofCompliance(AMOCs)TheManager,EngineCertificationOffice,mayapproveAMOCsforthisAD.Usetheproceduresfoundin14CFR39.19tomakeyourrequest.Youmayemailyourrequestto:ANE-AD-AMOC@faa.gov.(h)RelatedInformation(1)Formoreinfom1ationaboutthisAD,contactRobertGreen,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7754;fax:781-238-7199;email:robert.green@faa.gov.(2)RefertoMCAIEuropeanAviationSafetyAgencyAD2015-0055,datedMarch31,2015,formoreinformation.YoumayexaminetheMCAIintheADdocketontheInternetathttp://www.regulations.govby searchingforandlocatingitinDocketNo.FAA-2015-1383.(3)TechnifyMotorsSBNo.SBTMG125-1018PI,Revision1,datedFebruary5,2015;TechnifyMotorsSBNo.TMTAE000-0007,Revision28,datedFebruary5,2015;TechnifyMotorsInstallationManualNo.IM-02-02,Issue4,Revision2,datedJanuary30,2015,withChapter02-IM-13-02,section13.8.16,Revision1,datedNovember28,2014;TechnifyMotorsSBNo.SBTMG601-1007PI,Revision3,datedFebruary5,2015;andTechnifyMotorsSBNo.SBTMG651-1004PI,Revision2,datedFebruary5,2015,canbeobtainedfromTechnifyMotorsGmbH,usingthecontactinformationinparagraph(h)(5)ofthisproposedAD.(4)DiamondAircraftIndustriesGmbHMSBNo.42-109/1,datedFebruary4,2015;andDAlMSBNo.42-007/16,datedFebruary4,2015,canbeobtainedfrom9DiamondAircraftIndustriesGmbH,usingthecontactinformationinparagraph(h)(5)ofthisproposedAD.(5)ForTechnifyMotorsserviceinformationidentifiedinthisproposedAD,contactTechnifyMotorsGmbH,Platanenstrasse14,D-09356SanktEgidien,Germany;phone:+49-37204-696-0;fax:+49-37204-696-55;email:info@centurion-engines.com.ForDAIserviceinformationidentifiedinthisproposedAD,contactDiamondAircraftIndustriesGmbH,N.A.Otto-Strasse5,2700WienerNeustadt,Austria;phone:+43262226700;fax:+432622267001369;email:airworthiness@diamond-air.at.(6)YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.IssuedinBurlington,Massachusetts,onJune26,2015.AnnC.Mollica,ActingDirectorateManager,Engine&PropellerDirectorate,AircraftCertificationService.10