Version 3.1 (11107/2012) [4910-13-P) 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA-2012-0520; Directorate Identifier 2002-NE-43-AD; Amendment 

'1 ~1 5 39-Y;AD~ ] 

~o~ ~- ~J.t-b5 RIN 2120-AA64 

Ainvorthiness Directives; Turbomeca S.A. Turboshaft Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are superseding an existing airworthiness directive (AD) for all 

Turbomeca S.A. ArriellA, lAl, 1A2, lB, lC, lCl, 1C2, lD, IDI, IE, IE2, IK, IKl, 

1 S, and 1 S 1 turboshaft engines. That AD currently requires initial and repetitive visual 

inspections for erosion caused by dust ingestion and, if necessary, cleaning of the gas 

generator (module M03). This new AD requires determining the engine history; 

performing a one-time visual inspection of the axial compressor for erosion; 

performing initial and repetitive cleaning of the gas generator hollow shaft; and replacing 

the rear bearing if the amount of dust collected during cleaning exceeds 8 grams. This 

AD also includes an optional terminating action. This AD was prompted by in-service 

experience which has shown that dust inside the gas generator hollow shaft may be found 

when the axial compressor wheel has less erosion than initially assessed. We are issuing 

this AD to prevent an unbalance of the gas generator rotating assembly, which may lead 

to gas generator rear bearing failure, and uncommanded engine shutdown. 

DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

SCURREI<CES 

Ol111SG S"i'!BOL 

E-11 0 

NITIAI.SISIG 

DATI! 

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i\NE-142 

NITIAI.SISIG 

DATE 

03/22110 

RO~NG SYMBOL 

•\ NE-140 

INITIAI.SISIG 

DATE 

ROlfllNGSYMBOL 

ANE-7 

NITIAI.SISIG 

VBennett/DA 

DATE 

11/07/2012 

ROlTTlNG SYMBOL 

ANE-111 

IN'ITIALSISIG 

rFitzgeraid /!J8 DATE 

10/24/2012 

ROlffiNG SYMBOL 

AEG 

DJohnson INrTIAI.SISIGl/ JJ 11 DATE 

10/25/2012 

O~N SYMBOL 

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ANE- 100 

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It lA/ fi "Z.-- .. ·-··--·· 
DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 ;(o IJ 

[Docket No. F AA~0520; Directorate Identifier 2002-NE-43-AD; Amendment 

39 .. AD .... . .. . 1 _,:X; 'X' Y. X":.< _ X':.'( _ 'X "1: 

RIN 2120-AA64 

Ainvorthiness Directives; Turbomeca S.A. Turboshaft Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are superseding an existing airworthiness directive (AD) for all 

Turbomeca S.A. Arriel lA, lAl, lA2, lB, lC, lCl , lC2, lD, lDl , 1E2, lKl, IS, and 

1 S 1 turboshaft engines. That AD currently requires initial and repetitive visual 

inspections for erosion caused by dust ingestion and, if necessary, cleaning of the gas 

generator (module M03). This new AD requires determining the engine history; 

performing a one-time visual inspection of the axial compressor for erosion; ATE 

1012412012 

performing initial and repetitive cleaning of the gas generator hollow shaft; and replacing .....,.,.,.,.,...,,.,..,...,._ OlJTTh'GSYMDOL 

the rear bearing if the amount of dust collected during cleaning exceeds 8 grams. This 

AD also includes an optional terminating action. This AD was prompted by in-service 

EG 

experience which has shown that dust inside the gas generator hollow shaft may be found ~~,.,..,....,..._­

when the axial compressor wheel has Jess erosion than initially assessed. We are issuing 

this AD to prevent an unbalance of the gas generator rotating assembly, which may lead 

to gas generator rear bearing failure, and uncommanded engine shutdown. 

DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

ADDRESSES: For service information identified in this AD, contact Turbomeca S.A., 

lNil'IALSISIG 

ATE 

OVmiG SYMBOL 

NE-100 
Legal 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 Bennett t D I A 11/07/2012 02 43 PM ANE-007, Office of Regional Counsel o: rexe ce : 

Cc: James E Gray, John Golinski, Paul Donato, Rose Len 

~ Hi Vine~ . Versiqn 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.f.M 

James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA, 

Rose Len/ANE/FAA@FAA 

11/07/2012 08:59AM 

ACTION BY 11109/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft Engines, Final 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 

From: 

To: 

Cc: 

Date: 

Subject: 

Vincent Bennett/ANE/FAA 

ANE-007, Office of Regional 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 

11/01/2012 04:51 PM 

Re: ACTION BY 11/09/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft 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 ~ 

Tara Fitzgerald 

ANE 111 R I k

. d P 1

. to: Drexel Ace 10/24/2012 03:12PM - , u ema mg an o 1cy 

Cc: Dale Johnson, James E Gray, John Golinski, Paul Donato, Rose Len 

Drexel, 

I reviewed Pre-grid version 2.0 and concur. 

Tara Fitzgerald 

Federal Aviation Administration 

Engine & Propeller Directorate Rulemaking and Policy, ANE-111 

12 New England Executive Park 

Burlington, MA 01803 

781-238-7130 

Drexel Ace . ·------··. Pr~~g id :0 for reviewJ .concur,ref1ce by_ASE/ A::· . 

From: Drexel Ace/ANE/FAA 

ANE-11 0, Standards Staff 

1012412012 10:09:26 AM 

To: 

Cc: 

Date: 

Rose Len/ANE/FAA@FAA, Dale Johnson/ANE/FAA@FAA, Tara Fitzgerald/ANE/FAA@FAA 

John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA, James E Gray/ANE/FAA@FAA 

10/24/2012 10:09 AM 

Subject: ACTION BY 10/30/2012: 02-NE-43-AD, Turbomeca SA Turboshaft Engines, Final 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: 781-238-7197 
Drexel, 

Re: ACTION BY 10/30/2012: 02-NE-43-AD, Turbomeca S.A. Turboshaft 

Engines, Final rule, supersedure - Pre-Grid 2.0 6ll 

Dale Johnson 

AEA-BOS-AEG-67, Burlington, MA to: Drexel Ace 10/25/2012 06:55 AM 

C . James E Gray, John Golinski, Paul Donato, Rose Len, Tara 

c. Fitzgerald 

AEG concurs with version 2.0 of this AD. 

Regards, 

Dale 

Dale Johnson 

Boston AEG 

781-238-7894 

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