# [4910-13

- P

J DEPARTMENT

OF TRANSPORTATION Fe

d

e

r

a

l Av iation Administration 14 CF

R Part

39 [Docket

No. FAA-2014-0164;

Directorate

Identifier 2014-NE-02-AD;

Amendment 39-17973;

AD 2014-19-05) RIN 2120-AA64 Ainvorthiness

Directives

; Turbomeca

S.A. Turboshaft

E ngine

s AGENC

Y

: 

# Federal Aviation Administration

(FAA),

DOT. ACT

IO

N: 

# Final

rule. SUMMA

RY:



# We

are adopting

a new airworthiness

directive

(AD)

fo

r all Turbomeca S.A. Arricl

I A

I,

I A2,

l B

,

l C,

l C

l,

l C2,

l D

,

l D

I,

I E2,

I K

l,

IS

,

1 S

l. 

# 2B,

2B

1

, 2C. 2C

I, 2C2,

2S

I, and

2S2 turboshaft

engines.

This

AD requires

an initial one-time vibration

check

of the engine accessory

gearbox

(AGB)

on certain

higher

r

i sk Arriel

I and Arriel

2 mode

l engines.

This

AD

also requir

es repetitive

vibration

checks

of the engine

AGB

for

all Arr

iel

1 and Aniel

2 engines

at eve

r y

e

n

g in

e shop

visit.

This

AD

was prompted

by reports ofuncommanded

in-flight

s hutdown

s on Turbomeca

S.A. Arriel

1 and Arriel

2 engines following

rupture

of the 41-tooth

gear forming

part

of the 41

/ 23-tooth

bevel

gear located

in the engine

AGB.

We

are issuing

this

AD

to prevent failure

of the engine

AGB,

which

could

lead

to in-flight shutdown

and damage

to the engine.

which

may result

in damage

to the aircraft. DATES:



# This

AD becomes

effective

[INSERT

DATE

35 DAYS AFTER

DATE

OF PUBLICATION

fN 

# THE FEDERAL REGISTER].TheDirectoroftheFederalRegisterapprovedtheincorporationbyreferenceofcertainpublicationslistedinthisADasof[INSERTDATE35DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].ADDRESSES:ForserviceinformationidentifiedinthisAD,contactTurbomeca,S.A..40220Tarnos,France;phone:33(0)559744000;telex:570042;fax:33(0)559744515.YoumayviewthisserviceinformationattheFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.ExaminingtheADDocketYoumayexaminetheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2014-0164;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,RoomWl2-140,1200NewJerseyAvenueSE.,Washington,DC20590.FORFURTHERINFORMATIONCONTACT:MarkRiley,AerospaceEngineer.EngineCertificationOffice,FAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA01803;phone:781-238-7758;fax:781-238-7199:email:mark.riley@faa.gov.2SUPPLEMENTARYINFORMATION:DiscussionWeissuedanoticeofproposedrulemaking(NPRM)toamend14CFRpart39byaddinganADthatwouldapplytothespecifiedproducts.TheNPRMwaspublishedintheFederalRegisteronJune4,2014(79FR32195).TheNPRMproposedtocorrectanunsafeconditionforthespecifiedproducts.ThisADresultsfromanMCAIoriginatedbyanaviationauthorityofanothercountrytoidentifyandcorrectanunsafeconditiononanaviationproduct.TheMCAIstates:CommentsSeveralcasesofuncommandedin-flightshut-down(IFSD)havebeenreportedonARRIEL1orARRIEL2enginesfollowingruptureofthe41-toothgearformingpartofthe41/23toothbevelgearlocatedintheaccessorygearbox(AGB)withinenginemoduleMOl.Resultsofsubsequentinvestigationsshowedthatthemeshingqualityofthebevelgearmayhavecontributedtotoothrupture.TheruptureoftheAGB41-toothgearmayleadtolossofdrivingofequipmentessentialtoengineoperation.Thisconditionifnotdetectedandcorrected,couldleadtoanuncommandedenginein-flightshut-downandmayultimatelyleadtoanemergencylanding.WegavethepublictheopportunitytoparticipateindevelopingthisAD.Weconsideredthecommentreceived.RequesttoProvideSufficientComplianceTimeOnecomrnenterrequestedthatweprovidesufficienttimetocomplywiththeAD.Thecommenterindicatedthatspecialtooling,tobesuppliedbyTurbomeca,isnecessary3tocomplywiththeAD.ThevibrationcheckitselfisalsoperformedbyTurbomecarepresentatives.Wedonotagree.Ouranalysishasconfirmedthat32monthsissufficienttimeforoperatorstocompletetheactionsrequiredbythisAD.WedidnotchangethisAD.ConclusionWereviewedtheavailabledata,includingthecommentreceived,anddeterminedthatairsafetyandthepublicinterestrequireadoptingthisADasproposed.Costs ofComplianceWeestimatethatthisADaffects1,268enginesinstalledonaircraftofU.S.registry.Wealsoestimatethatitwilltakeabout4hoursperenginetocomplywiththeinspectionrequirementinthisAD.Theaveragelaborrateis$85perhour.Basedonthesefigures,weestimatethecostofthisADonU.S.operatorstobe$431,120.AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency"sauthority.Weareissuingthisrulemakingundertheauthoritydescribedin''SubtitleVILPartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthority4becauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWedetermined thatthisADwillnothavefederalismimplicationsunderExecutiveOrder13132.ThisADwillnothaveasubstantialdirecteffectontheStates.ontherelationshipbetweenthenationalgovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,IcertifythisAD:(1)Isnota"significantregulatoryaction"LmderExecutiveOrder12866,(2)Isnota"significantrule"undertheDOTRegulatoryPoliciesandProcedures(44FR11034,February26,1979),(3)WillnotaffectintrastateaviationinAlaskatotheextentthatitjustifiesmakingaregulatorydistinction,and(4)Willnothaveasignificanteconomicimpact,positiveornegative,onasubstantialnumberofsmallentitiesunderthecriteriaoftheRegulatoryFlexibilityAct.ListofSubjectsin14CFRPart39Airtransportation,Aircraft,Aviationsafety,tncorporationbyreference,Safety.AdoptionoftheAmendmentAccordingly,undertheauthoritydelegatedtomebytheAdministrator,theFAAamends14CFRpa1139asfollows:PART39-AIRWORTHINESSDIRECTIVES1.Theauthoritycitationforpart39continuestoreadasfollows:Authority:49U.S.C.106(g),40113, 44701.5§39.13[Amended)2.TheFAAamends§39.13byaddingthefollowingnewairworthinessdirective(AD):2014-19-05TurbomecaS.A.:Amendment39-17973;DocketNo.FAA-2014-0164;DirectorateIdentifier2014-NE-02-AD.(a)EffectiveDateThisADbecomeseffective[INSERTDATE35DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER].(b)AffectedADsNone.(c)ApplicabilityThisADappliestoallTurbomecaS.A.ArriellAl,1A2,1B,1C,ICI,1C2,ID.lDl,1E2,lKl,IS,lSI,2B,2Bl,2C,2CI,2C2,2Sl,and2S2turboshaftengines.(d)ReasonThisADwaspromptedbyreportsofuncommandedin-flightshutdownsonTurbomecaS.A.ArrielIandArriel2enginesfollowingruptureofthe41-toothgearformingthe41/23-toothbevelgearlocatedintheengineaccessorygearbox(AGB).WeareissuingthisADtopreventfailureoftheengineAGB,whichcouldleadtoin-flightshutdownanddamagetotheengine, whichmayresultindamagetotheaircraft.(e)ActionsandComplianceUnlessalreadydone,dothefollowing.6(1)ForallTurbomecaS.A.Arrie11B,lD,1D1,2B,and2B1turboshaftengines.performaone-timevibrationcheckoftheAGB41/23-toothbevelgearmeshingwithin32monthsoftheeffectivedateofthisAD,asfollows:(i)ForallTurbomecaS.A.Arriel1B,1D,and1Dlengines,exceptthoseengineswithanAGBinstalledwithaserialnumber(SIN)listedinFigure1ofTurbomecaS.A.MandatoryServiceBulletin(MSB)No.292720839,VersionB,datedNovember25.2013,useparagraphs6.A.through6.C.ofTurbomecaS.A.MSBNo.292720839,VersionB,datedNovember25,2013,toperfmmthevibrationcheck.Thereportingrequirementsinparagraphs6.A.(l)(c),6.A.(2)(b),and6.B.(l)(c)andtherequirementtoreturnmoduleMOJinparagraph6.B.(2)(b)2_,ofTurbomecaS.A.MSBNo.292720839,VersionB,datedNovember25,2013,arenotrequiredbythisAD.(ii)ForallTurbomecaS.A.Arriel2Band2B1engines,exceptthoseengineswithanAGBinstalledwithanSINlistedinFigure1ofTurbomecaMSBNo.292722849,VersionB,datedNovember25,2013,useparagraphs6.A.through6.C.ofTurbomecaS.A.MSBNo.292722849,VersionB,datedNovember25,2013,toperformthevibrationcheck.Thereportingrequirementsinparagraphs6.A.(1)(c),6.A.(2)(b),and6.B.(1)(c),andtherequirementtoreturnmoduleMOlinparagraph6.B.(2)(b)2_,ofTurbomecaS.A.MSBNo.292722849,VersionB,datedNovember25,2013,arenotrequiredbythisAD.(2)ForallaffectedTurbomecaS.A.engines.duringeachengineshopvisitaftertheeffectivedateofthisAD,performavibrationcheckoftheAGB41/23-toothbevelgearmeshing.Guidanceonperformingthevibrationcheckduringanengineshopvisit7can

be found

in the service

inform

ation

listed

in paragraph

(i)(3)

in the Related Information

sect

i o n. (3)

If

th

e AGB

does

not pass

th

e vibrat

i on check required

by paragraphs

(e)(

I ) o

r (e)(2)

of this

AD, replace

the AGB

with

a part eligible

for installation. ( f) Credit

f o

r Pre

v iou

s Action If you performed

a vibration

check

of the AGB before

the effect

ive date

of this AD using Turbomcca

S.A. MSB

No.

292

72 0839, Version

A, dated September

9

, 20

1 3: or MSB

No.

292

72 2849, Version

A, dated September

9, 2013

, or during

an engine

shop visit

per paragraph

(e)(2)

of this

A D. you

met

the initial inspection requirement

of paragraph

(e)(l) ofthis

AD. ( g

) Definiti

o

n For

the purpose

of this

AD

, an

"e ngine

shop visit"

is the induction

of

an engine into

the shop

fo

r maintenance

in vo

l ving

the sepa

r a tion

of pairs

of major mating

eng

i ne flanges.

The separa

tion

of engine

flanges

so

lel

y for

the purpose

of

tr ansportation

w

i thout s ubsequ

ent engine

maint

e nance

does

n

o

t consti

tut

e an engine

shop

vis

it. ( h) Alt

e rnative

Me thod

s of Co mplian

ce

( AMO

Cs

) The Manager,

E

n gi ne Certification

Office,

FAA,

may approve

AMOCs

to this A

D

. Use

the procedu

r es found

in

14 CFR 39.19

to make

you

r reque

st. (

i ) R

e

l a

t e d In

fo rm

a ti

o

n ( 1) For more information

about

this

AD, contact

Mark

R

i

l ey, Aerospace

Engineer. Engine Certification

Office,

FAA

, Engine

& Propeller Directorate.

12 New England Executive

Park

, Burlington,

MA 01803:

phone: 781-238-7758;

fax: 781-238-7199:

email: mark.rile)

@f aa.gov.

8

# (2) Refer

to MCAI European

Aviation

Safety Agency

AD 2014-0036,

dated Februar

y

11

, 2014,

for related information.

You

may examine

the MCAI

in the

AD docket

on

the Internet

at http: //www .regulations.gov

/# !docketDetail;D=FAA

-20 14-0164. (3) Turbomeca

Engine

Test

Bed Acceptance

Test Specifications

CCT

No. 0292009400,

Version

T

; CCT

No. 0292019400

, Version

R; CCT

No. 0292019690

, Version

I

; CCTNo. 029201530,

Version

K; CCTNo. 0292019610,

Version

K

; CCTNo. 0292029450

, Version



# J; CCT

No. 0292029490

, Version

I

; CC

T No. 0292029440

, Ver

s

i on

I

; CCT

No. 0292029480,

Version

K; CCT

No. 0292029520

, Version

H

; CCT No. 0292029410,

Version

L; CCT

No. 0292029530

, Ver

s ion

II

; or Turb omeca

ID No. 383952;

or Turbomeca

RTD

No.

X 292

65 327

2, which

are

not incorporated

by r efe

r e nce

in this

AD,

can

be obtained

from Turbomeca

S.A.,

u

s ing

the contact information

in paragraph

G)(3)

of this

AD. 

# U) Material Incorporated



# by Reference 

# ( 1) The Director

of the Federal

Re giste

r approved

the incorporation

by referenc

e (IBR)

of

the

se rvice information

listed

in this paragraph

under

5 U.S.C.

552(a)

and

1 

# CFR part

5

1. (2) You

must

use

this service information

as applicable

to

do

th

e actions

requir

e d b

y this

AD,

unle

ss the

AD specifies otherwise. (

i ) 

# Turbomeca

S.A. Mandato

ry Service

Bull

etin

( MSB

) No.

292

72 0839, Version B, dated Novembe

r 25,2013. (ii) Turbomeca

S.A.

MSB

No.

292

72 2849, Version

B, dated November

25

. 2013.

9(iii)TurbomecaS.A.Arriel1TechnicalInstruction(TI)No.292720839,VersionE,datedFebruary20,2014.(iv)TurbomecaS.A.ArriellTINo.292720840,datedNovember29,2013.(v)TurbomecaS.A.Arriel2TINo.292722849,VersionE,datedFebruary20,2014.(vi)TurbomecaS.A.Arriel2TINo.292722850,datedNovember29,2013.(3)ForTurbomecaS.A.serviceinformationidentifiedinthisAD,contactTurbomeca,S.A.,40220Tamos,France;phone:33(0)559744000;telex:570042;fax:33(0)559744515.(4)YoumayviewthisserviceinformationatFAA,Engine&PropellerDirectorate,12NewEnglandExecutivePark,Burlington,MA.ForinformationontheavailabilityofthismaterialattheFAA,call781-238-7125.(5)YoumayviewthisserviceinformationattheNationalArchivesandRecordsAdministration(NARA).ForinformationontheavailabilityofthismaterialatNARA.call202-741-6030,orgoto:http://www.archives.gov/federal-register/cfr/ibrlocations.html.IssuedinBurlington,Massachusetts,onSeptember15,2014.ColleenM.D'Alessandro,AssistantDirectorateManager,Engine&PropellerDirectorate,AircraftCertificationService.10