Version 3
. 1 (11107/2012) 

### [4910-13-P ) DEPARTMENT OF TRANSPORTATION Federa l Av i at i on Ad mi n is t ration 14 CFR Par t 39 [Docket No . FAA - 2012-052 0 ; Di rectorate I dentifie r 2002-NE-43-AD; Amendment

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### RI N 2120 - AA64 Ainvorth iness Directives; Turbomeca S.A. Turboshaft Engines 

### AGENCY: Federal Aviation Administration (FAA) , DOT. 

### ACTION: Final rul e . 

### SUMMA RY : We are superseding an existing airworthiness directive (AD) for all Turbomeca S.A. Arri e llA , lAl, 1A2 , lB , lC , lCl , 1C2 , lD , IDI , IE , IE2 , IK, IKl , 1

S , a nd 1S 1 turbo s haft engine s . That AD currently r e quire s initial and re petitive visua l insp e ctions for erosion caused by dust ingestion and, if necessary , cleaning of the gas g e n e rator (module M03). This new AD requires determining the engine history ; p e rf o rming a one-tim e v isual inspection of the axial compressor for ero s ion ; p e rforming initial and repetitive cleaning of the gas g e nerator hollow shaft ; and replacing the rear bearing if the amount of dust collected during cleaning exceed s 8 grams. Thi s AD also include s an optional terminating action. Thi s AD was prompted b y in-service
e x p e rience which h as s hown that du s t inside the gas ge nerator hollow s haft may be found when the axia l compressor wheel has less erosion th an initia ll y assessed
. We are issuing this AD to prevent an unbalance o f the gas generator rotating assembly , which may l e ad to g as generator rear bearing failure , and uncommand e d engine shutdown. 

### DATES: 

### This AD is effective [INS E RT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. SCURREI<CES**Ol111SG** S"i'!BOL**E- 11** **0** NITIAI.SISIG

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### DEPARTMENT O F TRANSPORTATION Federal Aviation Admin i stration 14 CFR Part 39 

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## AA~0520; Directorate Identifier 2002-NE-43-AD; Amendment 39 .. AD .... . .. . 

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### RIN 2120-AA64 Ainvorth ine ss Dir ec tives; Turbomeca S.A. Turboshaft Engi nes 

### AGENCY: Federal Aviati on Administration (FAA) , DOT. 

### ACTION: Final rule. 

### SUMMA RY : W e are s up erseding an ex i sting a irw ort hin ess directive (AD) for all Turbomeca S.A. Arriel lA, l Al , lA2, lB , lC, lCl , lC2 , lD, lDl , 1E2 , lKl, IS , and 1

S 1 turboshaft engines. That AD cu rrently requires in itial and repetitive visual in s pections for erosion caused by du st ingestion and, if necessary , cleaning of the gas ge n erato r (modu le M03). Th i s new AD requires det erm ining the engine history; performing a one-time vis ual in spec tion of the axial compress or for erosion; ATE 10 12 4 120 12 performing initial and repe titive cleaning of the gas ge nerator hollow shaft; and replacin g .....,.,.,.,.,...,,.,..,...,._ OlJTTh'GSYMDOL th e rear bearing if th e amount of du s t collected during cleaning exceed s 8 g rams. This AD also include s an op tional termina ting acti on. Th i s AD was prompted by in

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experie nce which ha s s hown that dust inside the gas generator ho ll ow s h aft may be foun d**~~,.,..,....,..._­** w he n the axia l compressor whee l ha s J ess e rosion tha n in i tia ll y assessed. We are i ss uin g this AD to prevent an unbalance of the gas generator rotating assemb ly, whic h may lead to gas ge nerator rear bearing failure , and uncommand e d e n g ine shutdown. 

### DATES: T his AD i s effective [INS ERT DATE 35 DAYS AFTE R DATE O F PUBLICATION 

### IN THE FEDERAL REGISTER]. 

### ADDRESSES: For serv ice information identified in this AD, contact Turbomeca S.A. , lNil'IALSISIG
ATE

OVmiG SYMBOL NE- 1 00Legal concurs. Regards, 

## v Drexel Ace From: To: Cc: Date: Subject:
Hi Vince, Re: ACTION BY 11/09/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft Engines, Final rule, supersedure -- Grid 3.1**~** Vincent Benne tt t D I A 11/07/2012 02 43 PM ANE-007, Offic e o f R egio nal Co u nsel o : rexe ce : Cc: James E Gray , John Golinski, Pau l Donato , Rose Len**~** Hi**Vine~ .**  Vers iqn 3 .
. 1 , revised per yqur co,n.versa . . . Drexel Ace/ANEIFAA ANE-11 0 , Standards Staff Vincent Bennett/ANE/FAA@FAA, 

### .J 1 / 07/2012 08:59:49
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James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA , Rose Len/A NE/FAA@FAA 11/07/2012 08:59AM ACTION BY 11109/2012: 02 - NE-43-AD, Tu rbomeca S.A. Turboshaft Engines, F i nal rule , supersedure - Grid 3.1

Version 3.1 , revised per your conversation with Rose , attached for your review I concurrence . Thanks. --Drexel

02ne43fs
. doc
Drexel Ace Technical Writer - Editor Federal Aviation Administration Air Certification Service Engine & Propeller Directorate Standards Staff, ANE-11 0 Burlington, MA Phone: 781-238 - 7197

F rom: To: Cc: Date: Subject: Vincent Bennett/ANE/FAA ANE-007, Office of Reg i onal Counsel Drexel Ace/ANE/FAA@FAA, James E Gray/ANE/FAA@FAA , John Golinski/ANE/FAA@FAA, Paul Donato/ ANEIFAA@FAA, Rose Len/ANE/FAA@FAA 11/01/20 12 04:51 PM Re: ACT I ON BY 11/09/2012: 02-NE-43-AD, Turbomeca S.A. Tu rboshaft Engines, Final rule, supersedure --Grid 3.0 What changed from the earlier AD isn't clear
. Pis ID the change
. R ,

### Re: ACTION BY 10/30/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft Engines, Final rule, supersedure-- Pre-Grid 2.0**~** T ara F i tzgerald A N E 111 R I k . d P 1 . to : Drexel Ace 10 /24/2012 03:12PM

- , u ema mg an o 1 cy Cc: Dale Johnson, James E Gray, John Golinski , Paul Donato, Rose Len Drexel, I reviewed Pre-gr i d version 2.0 and concur. Tara Fitzgerald Federal Aviation Administration Engine & Propeller Directorate Rulemaking and Policy , ANE-111 12 New E ngland Executive Park Burlington , MA 01803 781-238 - 7130 Drexel Ace
. ·------ ··.**Pr~~g id** **:0** for revi ew J
. c o n c u r, re f1 c e by

_ A SE/ A : :· . From: Drexel Ace/ANE/FAA ANE-11 0, Standards Staff 1 0 1 2 4 1 2 012 10 : 09:26 AM

To: Cc: Date: Rose Len/ANE/FAA@FAA, Dale J ohnson/ANE/FAA@FAA, Tara Fitzge r ald/ANE/FAA@FAA John Golinski /ANE / FAA@FAA, Paul Donato /ANE/FAA@FAA, James E Gray/ANE/FAA@FAA 1 0/24/2012 10:09 AM Subject: ACTION BY 10/30 / 2012: 02-NE-43-AD, Turbomeca SA Tu rboshaft Engines , F i nal rule , supersedure -- Pre-Grid 2.0 Pre - grid 2.0 for review I concurrence by ASE I AEG I Standards PO. Thanks
.

- -Drexel [attachment "02ne43fs.doc" deleted by Tara FitzgeraldiANEIFAA]
Drexel Ace Technical Writer- Editor Federal Aviation Administration Air Certification Service Engine & Propeller Directorate Standards Staff, ANE - 11 0 Burlington , MA Phone: 781-238 - 7197Drexel , 

### Re: ACTION BY 10/30/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft Engines, Final rule, supersedure - Pre-Grid 2.0 

## 6ll D ale J ohnso n A EA- BOS-AEG- 67, Burl i n gton, MA to : Drexel Ace 10/25/2012 06 : 55 AM C

. James E Gra y, John Go l inski, Paul Donato, Rose Len, Ta r a c. F i tzgera l d

AEG concurs with version 2
. 0 of this AD. Regards, Dale

Dale Johnson Boston AEG 781-238-7894 We value your comments , please fill out the form below : http://www.faa.gov/abouVoffice_org/headquarters

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