14910-13-P]DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2014-0164;DirectorateIdentifier2014-NE-02-AD;Amendment39-18191;AD2015-13-04]RIN2120-AA64AirworthinessDirectives;TurbomecaS.A.TurboshaftEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Finalrule.SUMMARY:Wearesupersedingairworthinessdirective(AD)2014-19-05forallTuTbomecaS.A.Arriel1A1,1A2,lB,lC,lCl,1C2,10,1D1,1E2,1KJ,1S,1Sl,2B,2Bl,2C,2Cl,2C2,2S1,and2S2turboshaftengines.AD2014-19-05requiredaninitialone-timevibrationcheckoftheengineaccessorygearbox(AGB)oncertainArriel1andArriel2modelengines,andrepetitivevibrationchecksforallArriel1andArriel2engines.ThisADwaspromptedbyourdeterminationthatweincorrectlyidentifiedtechnicalreferencesinAD2014-19-05.WeareissuingthisADtopreventfailureoftheengineAGB,whichcouldleadtoin-flightshutdownanddan1agetotheengine,whichmayresultindamagetotheaircraft.DATES:ThisADiseffective[INSERTDATE35OAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].TheDirectoroftheFederalRegisterapprovedtheincorporationbyreferenceofcertainpublicationslistedinthisADasof[INSERTDATE35DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].TheDirectoroftheFederalRegisterapprovedtheincorporationbyreferenceofcertainotherpublicationslistedinthisADasofNovember5,2014(79FR59091,October1,2014).ADDRESSES:ForserviceinformationidentifiedinthisAD,contactTurbomecaS.A.,40220Tarnos,France;phone:330559744000;telex:570042;fax:330559744515.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ItisalsoavailableontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2014-0164.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2014-0164;orinpersonattheDocketManagementFacilitybetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisAD,themandatorycontinuingairworthinessinformation,regulatoryevaluation,anycommentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isDocumentManagementFacility,U.S.DepartmentofTransportation,DocketOperations,M-30,WestBuildingGroundFloor,RoomW12-140,1200NewJerseyAvenueSE.,Washington,DC20590.FORFURTHERINFORMATIONCONTACT:MarkRiley,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEngland2ExecutivePark,Burlington,MA01803;phone:781-238-7758;fax:781-238-7199;email:mark.riley@faa.gov.SUPPLEMENTARYINFORMATION:DiscussionWeissuedanoticeofproposedrulemaking(NPRM)toamend14CFRpart39tosupersedeAD2014-19-05,Amendment39-17973(79FR59091,October1,2014),("AD2014-19-05").AD2014-19-05appliedtothespecifiedproducts.TheNPRMpublishedintheFederalRegisteronFebruary4,2015(80FR6017).TheNPRMproposedtocontinuetorequireaninitialone-timevibrationcheckoftheengineAGBoncertainhigherriskArriel1andArriel2modelengines.ThatNPRMalsoproposedtocontinuetorequirerepetitivevibrationchecksoftheengineAGBforallArriel1andArriel2enginesateveryengineshopvisit.WegavethepublictheopportunitytoparticipateindevelopingthisAD.Weconsideredthecommentsreceived.RequesttoAllowSufficientComplianceTimeOnecommenterrequestedthatsufficienttimebeallowedtocomplywiththisADtoaccountfortheavailabilityofthevibrationtestequipmentandTurbomecatechnicalrepresentatives.Thecommenterindicatedthattheinitialone-timevibrationcheckoftheengineAGBrequiresuseofTurbomeca-specifiedvibrationtestequipmentandisperformedbyTurbomecatechnicalpersonnel.Wedonotagree.ThecompliancetimesintheADprovidesufficienttimefortheoperatortoperformtherequiredmaintenance.Operatorscanalsoprocuretherequiredvibrationtestequipmenttoperformthetest.WedidnotchangethisAD.3

# Request

to Revise Definition

of Shop

Visit One

co nun enter requested

that

we revise

the

AD

to make

the definition

of "shop visit" consistent

with EASA

AD 2014-0036.

The EASA

AD specifies

that

the repetitive vibration

check

of the engine

AGB

be performed

during

a ''qualifying

shop visit,"

which is when

the engine

is "overhauled

or repaired

in

a qualified

Repair Center."

The comme

nt

e

r indicated

that because

ofthe modularity

of the Arriel engine,

it

is possible

to separate

a major mating

flange

during

"Leve

l 2"

or "Level

1 maintenance." We

do

not agree.

We

do

not find specific

criteria

in EASA

AD 2014-0036's definition

of"engine

shop visit"

for when

the repetitive

AGB vibration

check should

be conducted.

We

did

not change

this

AD. 

# Request

to Eliminate

Repetitive

Vibration

Check One commenter

requested

that

the repetitive

vibration

check required

by this

AD be eliminated.

The commenter

indi cated

that

this vibra

ti on check

is already incorporated in Turbomeca

Level

4 maintenance,

and

in subsequent

test requirements,

so

it will always be done. Further,

adding

this requirement

to the

AD

on

l y adds

to the cost

and paperwork requirements

for operators. We

do

not agree.

The repetitive

vibration

checks

of the engine

AGB

are required to prevent

failure

of the AGB.

We

did

not change

thi

s AD. 

# Revisions

to Serv

ice Information

References Turbomeca

S.A. updated

the service bulletins

(SBs) referenced

in this

AD.

We reviewed

the updated

SBs

and found

they adequately

addressed

the unsafe condition. Therefore,

we revised

this

AD

to reference

the updated

versions

of the SBs.

This

AD now references Turbomeca

S.A. Mandatory

Service

Bulletin

(MSB)

No.

292

72 0839, Version 

# 4C,datedJune18,2014,andTurbomecaS.A.MSBNo.292722849,VersionC,datedJune18,2014.Wealsorevisedcomplianceparagraph(e)ofthisADtorefertothecorrespondingparagraphsusedintheseupdatedMSBstorequirethevibrationchecks.ConclusionWereviewedtheavailabledata,includingthecommentsreceived,anddeterminedthatairsafetyandthepublicinterestrequireadoptingthisADwiththechangesdescribedpreviously.WedeterminedthatthesechangeswillnotincreasetheeconomicburdenonanyoperatororincreasethescopeofthisAD.RelatedServiceInformationunder1CFRpart51WereviewedTurbomecaS.A.MSBNo.292720839,VersionC,datedJune18,2014;andTurbomecaS.A.MSBNo.292722849,VersionC,datedJune18,2014.Theserviceinformationdescribesproceduresforvibrationchecks.ThisserviceinformationisreasonablyavailablebecausetheinterestedpartieshaveaccesstoitthroughtheirnormalcourseofbusinessorbythemeansidentifiedintheADDRESSESsectionofthisAD.CostsofComplianceWeestimatethatthisADaffects1,268enginesinstalledonaircraftofU.S.registry.Wealsoestimatethatitwilltakeabout4hoursperenginetocomplywiththeinspectionrequirementinthisAD.Theaveragelaborrateis$85perhour.Basedonthesefigures,weestimatethecostofthisADonU.S.operatorstobe$431,120.AuthorityforthisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,Section106,describestheauthorityoftheFAAAdministrator.5SubtitleVII,AviationPrograms,describesinmoredetailthescopeoftheAgency'sauthority.WeareissuingthisrulemakingundertheauthoritydescribedinSubtitleVII,PartA,SubpartIII,Section44701,"Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemak:ingaction.RegulatoryFindingsThisADwillnothavefederalismimplicationstmderExecutiveOrder13132.ThisADwillnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalgovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,IcertifythatthisAD:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,(2)Isnota"significantrule"underDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)WillnotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.6ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,Incorporationbyreference,Safety.AdoptionoftheAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAamendspart39oftheFederalAviationRegulations(14CFRpart39)asfollows:PART39-AIRWORTHINESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113,44701.§39.13[Amended]2.TheFAAamends§39.13byremovingairworthinessdirective(AD)2014-19-05,Amendment39-17973(79FR59091,October1,2014),andaddingthefollowingnewAD:2015-13-04TurbomecaS.A.:Amendment39-18191;DocketNo.FAA-2014-0164;DirectorateIdentifier2014-NE-02-AD.(a)EffectiveDateThisADiseffective[INSERTDATE35DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].(b)AffectedADsTllisADsupersedesAD2014-19-05,Amendment39-17973(79FR59091,October1,2014).(c)ApplicabilityThisADappliestoallTurbomecaS.A.AniellA1,1A2,1B,1C,1 C 1,1C2,1 D,lDl,1E2,1Kl,IS,lSI,2B,2Bl,2C,2C1,2C2,2S1,and2S2turboshaftengines.7(d)UnsafeConditionThisADwaspromptedbyreportsofuncommandedin-flightshutdownsonTurbomecaS.A.Arriel1andArriel2enginesfollowingruptureofthe41-toothgearfonningpartofthe41/23-toothbevelgearlocatedintheengineaccessorygearbox(AGB).WeareissuingthisADtopreventfailureoftheengineAGB,whichcouldleadtoin-flightshutdownanddamagetotheengine,whichmayresultindamagetotheaircraft.(e)ComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.(1)ForallTurbomecaS.A.ArrielIB,ID,IDI,2B,and2B1turboshaftengines,performaone-timevibrationcheckoftheAGB41/23-toothbevelgearmeshingwithin32monthsoftheeffectivedateofthisAD,asfollows:(i)ForallTurbomecaS.A.ArrielIB,ID,andlDlengines,exceptthoseengineswithanAGBinstalledwithaserialnumber(SIN)listedinthefigureunderparagraph2.2.ofTurbomecaS.A.MandatoryServiceBulletin(MSB)No.292720839,VersionC,datedJune18,2014,useparagraph2.3.1.through2.3.3.ofTurbomecaS.A.MSBNo.292720839,VersionC,datedJune18,2014,toperformthevibrationcheck.(ii)YoumustalsouseTurbomecaS.A.ArTielITechnicalInstruction(Tl)No.292720839andTurbomecaS.A.ArrielITINo.292720840todothevibrationcheck.(iii)ForallTurbomecaS.A.Arriel2Band2Blengines,exceptthoseengineswithanAGBinstalledwithanSINlistedinthefigureunderparagraph2.2.ofTurbomecaS.A.MSBNo.292722849,VersionC,datedJune18,2014,useparagraphs2.3.1.through2.3.3.ofTurbomecaS.A.MSBNo.292722849,VersionC,datedJune18,2014,toperformthevibrationcheck.TurbomecaS.A.MSBNo.292722849referstoTurbomecaS.A.Arriel2TINo.292722849andtoTurbomecaS.A.Arriel2TINo.292722850,whichyoumustalsousetodothevibrationcheck.8

# (iv)

The reporting requirements

in paragraph

s 2.3.1.1.3.,

2.3.2.1.3.,

and

the requirement

to return module

MOl {AGB)

to

a Repair

Center

in paragraph

2.3.2.2.2.

in Turbomeca

S.A. MSB

No.

292

72 0839

, Version

C, dated

June

18 ,20

14

, and

in Turbomeca

S.A. MSB

No.

292

72 2849, Version

C, dated

June 18,2014,

are

not required by this

AD. (2) For

a

ll affected

Tu rbo

m eca

S

. A. engi

n es, during

each engine

s h op visit

after the effective

date

of

th

i

s AD, perform

a vibration

check

of the AGB 41/23-toot

h beve

l gear meshing.

(3)

If the 1\GB



# does

not pass

the vibration

check required

by paragraphs

(e)(l)

or (e)(2)

of this

AD, replace

the AGB

with

a part eligible

for installation. 

# (f)

C

r

e dit

for

Pr

ev iou

s A cti

o

n If you performed

a

v ibration

check

of the AGB before

the effective

date

of this AD

u si ng Turbomeca

S.A. MSB

No.

292

72 0839, Version

A, dated September

9, 2013, or Vers

i on

B

, dated Novembe

r 25,2013,

or MSB

No.

292

72 2849, Version

A, dated September

9,

20

1 3,

or Vers

i on

B

, dated November

25, 2013;

or during

an engine

shop visit

per paragraph

(e)(2)

of this

AD

, you

met

the initial

in

s pection requirement

of paragraph

(e)(

1) of this

AD. (g)



# D efi niti

o n For

the purpose

of this

AD,

an

"e ngine

shop

vis

i

t "

i s the induction

of

an engine into

th

e shop

for maintenance

involving

the separat

ion

of

pa

i r

s of major mating

engine fl

a n ges.

Th

e se par ation

of engine

flanges

solely

for

th

e purpose

of transportation

without subsequent

e

n gi ne maintenance

doe

s not constitute

a

n engine

shop

visit. 

# (h) Alternative

Methods

of Compliance

(AMOCs) The Manager,

Engine Certification

Office,

FAA,

may approve

AMOCs

for this AD.

Use

the procedures

found

in

14 CFR 39.19

to make

your request.

You

may email your request

to: ANE-AD-AMOC@faa.gov.

9(i)RelatedInformation(1)FormoreinformationaboutthisAD,contactMarkRiley,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7758;fax:781-238-7199;email:mark.riley@faa.gov.(2)RefertoMCAIEuropeanAviationSafetyAgencyAD2014-0036,datedFebruary11,2014,forrelatedinformation.YoumayexaminetheMCAIintheADdocketontheInternetathttp://www.regulations.gov/#!documentDetail;D=FAA-2014-0164-0003.(3)TurbomecaS.A.EngineTestBedAcceptanceTestSpecificationsCCTNo.0292009400,VersionT;CCTNo.0292019400,VersionR;CCTNo.0292019690,VersionI;CCTNo.0292019530,VersionK;CCTNo.0292019610,VersionK;CCTNo.0292029450,VersionJ;CCTNo.0292029490,VersionI;CCTNo.0292029440,VersionI;CCTNo.0292029480,VersionK;CCTNo.0292029520,VersionH;CCTNo.0292029410,VersionL;CCTNo.0292029530,VersionH;orTurbomecaIDNo.383952;orTurbomecaRTDNo.X292653272,provideinfonnationonperformingavibrationcheckduringanengineshopvisit.TheseservicedocumentscanbeobtainedfromTurbomecaS.A.usingthecontactinformationinparagraph(j)(5)ofthisAD.(j)MaterialIncorporatedbyReference(1)TheDirectoroftheFederalRegisterapprovedtheincorporationbyreference(IBR)oftheserviceinformationlistedinthisparagraphunder5U.S.C.552(a)and1CFRpart51.(2)YoumustusethisserviceinformationasapplicabletodotheactionsrequiredbythisAD,unlesstheADspecifiesotherwise.(3)ThefollowingserviceinformationwasapprovedforIBRon[INSERTDATE35DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].10

# (i) Turbomeca

S.A. Mandatory

Service Bulletin

(MSB)

No.

292

72 0839, Version C, dated

June

18 ,2014. (ii) 

# Turbomeca

S.A. MSB

No.

292

72 2849, Version

C, dated

June

18, 2014. (4) The following

service information

was approved

for IBR

on November

5, 20

14 (79

FR 59091, October

1

, 2014). 2013.

(i) Turbomeca

S.A. MSB

No.

292

72 0839, Version

B, dated November

25, 2013. (ii) Turbomeca

S.A. MSB

No.

292

72 2849, Version

B, dated November

25, (iii) Turbomeca

S.A. Arriel

1 Technical

In

s truction

(TI)

No.

292

72 0839, Version E, dated February

20, 2014. (iv) Turbomeca

S.A. Arriel

1 TI No.

292

72 0840, Version

A, dated November 29,2013.

(v) Turbomeca

S.A. Arriel

2 TI No.

292

72 2849, Version

E, dated February

20, 20

14.

(vi) Turbomeca

S.A. Arriel

2 TI No.

292

72 2850, Version

A, dated November 29,20

1 3. (5) For Turbomeca

S.A. service information

identified

in this

AD, contact Turbomeca

S.A., 40220 Tarnos,

**France~**



# phone:

33

0

5 59

74

40

00; telex:

570

042;

fax: 33

0

5 59

74

45

1 5. (6) You

may view

this service infomtation

at FAA, Engine

& 

# Propeller Directorate,

12 New England Executive

Park, Burlington,

MA.

For information

on

the avai

l ability

ofthis material

at the FAA. call781-238-7125. (7) You

may view

this service information

at the National

Archives

and Records Administration

(NARA).

For information

on

the availability

of this material

at NARA, call 202-741-6030,

or

go

to: http:

// www.archivcs.gov

/ federal-register

/ cfr

/ibrlocations.html.

11IssuedinBurlington,Massachusetts,onJuly16,2015.RobertJ.Ganley,ActingManager,Engine&PropellerDirectorate,AircraftCertificationService.12