DEPARTMENTOFTRANSPORTATIONFederalAviationAdministration14CFRPart39[DocketNo.FAA-2015-0900;DirectorateIdentifier2015-NE-12-AD]RIN2120-AA64AirworthinessDirectives;TurbomecaS.A.TurboshaftEnginesAGENCY:FederalAviationAdministration(FAA),DOT.ACTION:Noticeofproposedrulemaking(NPRM).[4910-13-P]SUMMARY:Weproposetoadoptanewairworthinessdirective(AD)forcertainTurbomecaS.A.Arrius2Fturboshaftengineswithacertainpartnumberoilpumpinstalled.ThisproposedADwaspromptedbycasesofdeteriorationofthegasgeneratorfrontbearingduetoalinklossbetweenthepumpdriverandtheoilpumpshaft.ThisproposedADwouldrequireinspection,andifnecessary,replacementbeforefurtherflightoftheoilpumpdriverassemblyand/ortheoilpumpshaft,ortheoilpumpitself.WeareproposingthisADtopreventlinklossbetweenthepumpdriverandtheoilpumpshaft,whichcouldleadtoanenginein-flightshutdown,forcedlanding,anddamagetothehelicopter.DATES:WemustreceivecommentsonthisproposedADby[INSERTDATE60DAYSAFTERDATEOFPUBLICATIONINTHEFEDERALREGISTER).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:202-493-225I.Forserviceinformationidentifiedinthisproposed AD,contactTurbomecaS.A.,40220Tamos,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-20I5-0900;orinpersonattheDocketOperationsofficebetween9a.m.and5p.m.,MondaythroughFriday,exceptFederalholidays.TheADdocketcontainsthisproposedAD,themandatorycontinuingairworthinessinformation(MCAI),theregulatoryevaluation,any commentsreceived,andotherinformation.TheaddressfortheDocketOffice(phone:800-647-5527)isintheADDRESSESsection.CommentswillbeavailableintheADdocketshortlyafterreceipt.FORFURTHERINFORMATIONCONTACT:PhilipHaberlen,AerospaceEngineer,EngineCertificationOffice,FAA,Engine&PropellerDirectorate,I2NewEnglandExecutivePark,Burlington,MAOI803;phone:78I-238-7770;fax:781-238-7I99;email:philip.haberlen@faa.gov.2

# SUPPLEMENTARY

INF

O RMAT

I ON: Co mm

e nt

s In

vi

t e d 

# We invite

you

to send

any written

re

l evant

data

, views,

or arguments

about

this proposed

AD. Send

your comments

to

an address

listed

under

the ADDRESSES

section. Include

" Docket

No.

F AA

- 20

15

- 0900; Directorate

Identifier

20

15

- NE-12-AD"

at the beginning

of your comments.

We specifically

invite comments

on

the overall regulatory, economic, environmenta

l

, and energy

aspects

of this proposed

AD.

We

will consider

all comments

received

by the closing

date

and

may amend

this proposed

AD based

on those comments.

We

will post

all comments

we receive

, without

change,

to http ://www. regulations.gov

, including

any personal information

you provide.

We

will also

post

a report summarizing

each substantive

verbal contact

with

FAA personnel concerning

this proposed

AD. Di

s cu

ss

i o

n 

# The

E uropean

Aviation

Safety Agency (EASA),

which

is the Technical

Agent

for the Member

States

of the European Community

, has issued

EASA

AD 2015-0049,

dated March

17

, 2015 (Corrected

May

7, 2015) (referred

to hereinafter

as

"t he MCAI"),

to correct

an unsafe condition

for

the specified

products.

The MCAI

states: A risk

of

an in-flight shutdown

(IFSD)

has been identified

on

an ARRIUS

2F engine,

due

to deterioration

of gas generator

front bearing.

This could

be the result

of lack

of lubrication,

due

to

a link

loss between

pump

driver

and

oi

l pump

shaft. This condition

, if not detected

and corrected,

could

lead

to cases

of IFSD, possibly

resulting

in forced landing

with consequent

damage to the helicopter

and injury

to occupants. 3YoumayobtainfurtherinformationbyexaminingtheMCAIintheADdocketontheInternetathttp://www.regulations.govbysearchingforandlocatingDocketNo.FAA-2015-0900.RelatedServiceInformationunder1CFRPart51TurbomecaS.A.hasissuedMandatoryServiceBulletin(MSB)No.319794834,VersionB,datedOctober21,2014.TheMSBdescribesproceduresforinspectingtheoilpumpdriverassemblyontheoilpumpshaft,thepumpdriversplines,andtheoilpumpsplines.Thisserviceinformationisreasonablyavailable;seeADDRESSESforwaystoaccessthisserviceinformation.FAA'sDeterminationandRequirementsofThisProposedADThisproducthasbeenapprovedbytheaviationauthorityofFrance,andisapprovedforoperationintheUnitedStates.PursuanttoourbilateralagreementwiththeEuropeanCommunity,EASAhasnotifiedusoftheunsafeconditiondescribedintheMCAIandserviceinformationreferencedabove.WeareproposingthisADbecauseweevaluatedallinformationprovidedbyEASAanddeterminedtheunsafeconditionexistsandislikelytoexistordeveloponotherproductsofthesametypedesign.ThisproposedADwouldrequireinspection,andifnecessary,replacementbeforefurtherflight,oftheoilpumpdriverassemblyand/ortheoilpumpshaft,ortheoilpumpitself.CostsofComplianceWeestimatethatthisproposedADaffectsabout96enginesinstalledonhelicoptersofU.S.registry.WealsoestimatethatitwouldtakeabouttwohoursperproducttocomplywiththisproposedAD.Theaveragelaborrateis$85perhour.4Requiredpartswouldcostabout$17,312perengine.Basedonthesefigures,weestimatethecostofthisproposedADonU.S.operatorstobe$1,678,272.AuthorityforThisRulemakingTitle49oftheUnitedStatesCodespecifiestheFAA'sauthoritytoissuerulesonaviationsafety.SubtitleI,section106,describestheauthorityoftheFAAAdministrator."SubtitleVII:AviationPrograms,"describesinmoredetailthescopeoftheAgency'sauthority.Weareissuingthisrulemakingundertheauthoritydescribedin"SubtitleVII,PartA,SubpartIII,Section44701:Generalrequirements."Underthatsection,CongresschargestheFAAwithpromotingsafeflightofcivilaircraftinaircommercebyprescribingregulationsforpractices,methods,andprocedurestheAdministratorfindsnecessaryforsafetyinaircommerce.Thisregulationiswithinthescopeofthatauthoritybecauseitaddressesanunsafeconditionthatislikelytoexistordeveloponproductsidentifiedinthisrulemakingaction.RegulatoryFindingsWedeterminedthatthisproposedADwouldnothavefederalismimplicationsunderExecutiveOrder13132.ThisproposedADwouldnothaveasubstantialdirecteffectontheStates,ontherelationshipbetweenthenationalGovernmentandtheStates,oronthedistributionofpowerandresponsibilitiesamongthevariouslevelsofgovernment.Forthereasonsdiscussedabove,Icertifythisproposedregulation:(1)Isnota"significantregulatoryaction"underExecutiveOrder12866,5

# (2)

Is not

a "significant

rule" under

the DOT Regulatory

Po

l icies

and Procedures (44

FR 11034, February

26, 1979), (3) Will

not affect intrastate

aviation

in

A

l aska

to the extent

that

it justifies making

a regulatory distinction,

and (4) Will

not have

a significant

economic

impact

, pos

i tive

or negative,

on

a substantia

l number

of sma

ll entities

und

e

r

t h

e cr

i te

r ia

of the Regulatory

Fl ex ibilit

y Ac

t. List

of Subjects

in



# 14 CFR

Part



# 39 Air transportation,

Aircraft,

Av

i ation safety, Incorporation

by reference,

Safety. The Proposed Amendment Accordingly,

under

the authority delegated

to me

by

the Administrator,

the FAA proposes

to amend

14 CFR

part

39

as follows: PART



# 39 -AIRWORTHINESS

DIRECTIVES 1. The authority

citation

for part

39 continues

to read

as follows: Authority:

49 U.S.C.

106(g), 40113,44701. 

# § 39.13 [Amended) 2. The FAA amends§

39.13

by adding

the following

new airworthiness

directive (AD): Turbomeca

S.A.: Docket

No. FAA-2015-0900;

Directorate

Identifier 2015-NE-12-AD. (a)

Co mment

s Due Date We must receive comments

by [INSERT

DATE

60 DAYS AFTER

DATE

OF PUBLICATION

IN THE FEDERAL REGISTER). (b) Affected

ADs None.



# 6(c)ApplicabilityThisADappliestoallTurbomecaS.A.Arrius2Fturboshaftengineswithoilpump,partnumber(PIN)0319155050,installed,exceptfor:(1)Engines,equippedwithanoilpump,PIN0319155050,thatwereoverhauledinaTurbomecarepaircenterafterJanuary1,2013,and(2)Engineswithaserialnumberof34776orhigher,providedthattheoilpumpwasnotreplacedonthatenginesincethefirstflightofthatengineonahelicopter.(d)ReasonThisADwaspromptedbycasesofdeteriorationofthegasgeneratorfrontbearingduetoalinklossbetweenthepumpdriverandtheoilpumpshaft.WeareissuingthisADtopreventlinklossbetweenthepumpdriverandtheoilpumpshaft,whichcouldleadtoanenginein-flightshutdown,forcedlanding,anddamagetothehelicopter.(e)ActionsandComplianceComplywiththisADwithinthecompliancetimesspecified,unlessalreadydone.(1)Inspectthepumpdriverassemblyontheoilpumpshaft,thepumpdriversplines,andtheoilpumpsplines,usingparagraph2.4.2,OperatingInstructions,ofTurbomecaS.A.MandatoryServiceBulletin(MSB)No.319794834,VersionB,datedOctober21,2014,asfollows:(i)AftertheeffectivedateofthisAD,forengineswithlessthan250enginehours(EH),sincenew,sincelastoverhaul,orsincelastinstallationofanaffectedoilpump,whicheveroccurredlater,inspectbeforeexceeding300EHsincenew,sincelastoverhaul,orsincelastinstallationofanaffectedoilpump,asapplicable.7(ii)AftertheeffectivedateofthisAD,forengineswith250EHormore,butlessthan300EH,accumulatedsincenew,sincelastoverhaul,orsincelastinstallationofanaffectedoilpump,whicheveroccurredlater,inspectwithin50EH.(iii)AftertheeffectivedateofthisAD,forengineswith300EHormore,butlessthan800EH,accumulatedsincenew,sincelastoverhaul,orsincelastinstallationofanaffectedoilpump,whicheveroccurredlater,inspectwithin100EH.(iv)AftertheeffectivedateofthisAD,forengineswith800EHormore,accumulatedsincenew,sincelastoverhaul,orsincelastinstallationofanaffectedoilpump,whicheveroccurredlater,inspectduringthenextscheduled500EHinspection.(2)Ifanyoilpumpdriveassemblyand/oroilpumpshaft,ortheoilpumpitself,failstheinspectionrequiredbythisAD,thenbeforefurtherflight,replacethefailedpart(s)withpart(s)eligibleforinstallation.(3)Theinstructiontoreportinspectionresultsand theinstructiontoreturnacompliancecertificatetoTurbomecaS.A.asstatedinparagraph2.4.2,OperatingInstructions,ofTurbomecaS.A.MSBNo.319794834,VersionB,datedOctober21,2014,arenotrequiredbythisAD.(f)CreditforPreviousActionIfyouinspectedtheoilpumpdriverassemblyontheoilpumpshaft,thepumpdriversplines,and theoilpumpsplines,andreplacedanypart(s)withpart(s)eligibleforinstallationbeforetheeffectivedateofthisADinaccordancewithTurbomecaS.A.MSBNo.319794834,VersionA,datedNovember25,2013,youmettherequirementsofthisAD.8

# (g) Alternative

Methods

of Comp

li ance (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. (h) Rela

te

d Inf

or mation (1) 

# For more information

about

this

AD, contact

Philip Haberlen, Aerospace Engineer,

Engine Certificatio

n Office,

FAA,

E ngine



# & Propeller Directorate,

12 New England Executive

Park, Burlington,

MA

0 180

3; phone: 781-238-7770;

fax: 781-238- 7199;

emai

l

: philip.haberlen

@ faa.gov. (2) Refer

to MCAI European

Aviation

Safety Agency

AD 2015-0049,

dated March

17, 2015 (Corrected

May

7,

20

1 5),

for more information.

You

may examine

the MCAJ

in the

AD docket

on the Internet

at http://www.regulat

i ons.gov

by searching

for and locating

it

in Docket

No.

F AA-20 15-0900. (3) Turbomeca

S.A. MSB

No.

319

79 4834, Version

B

, dated October 21,2014, can

be obtained

from Turbomeca

S.A.

, using

the contact information

in paragraph

(h)(4) of this proposed

AD. (4) For

se rvice information

identified

in this proposed

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

15.

( 5) You

may view

this service information

at the FAA,

E ngine



# & Propeller Directorate,

12 New England

Executi

ve Park, Burlington,

MA

. For information

on

the availability

of this material

at the FAA,

call 781-238-7125. 

# 9IssuedinBurlington,Massachusetts,onMay11,2015.ColleenM.D'Alessandro,AssistantDirectorateManager,Engine&PropellerDirectorate,AircraftCertificationService.10