DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA-2012-1289; Directorate Identifier 2012-NE-43-AD; Amendment 

1 7 3.:2 .3 __;z e 6' r- odl- obl 

39-X...YXXX; AD 2013- ~ 

RIN 2120-AA64 

Airworthiness Directives; CFM International, S.A. Turbofan Engines 1?1or>.f~~P of 

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AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule; request for comments. 

SUMMARY: We are adopting a new airworthiness directive (AD) for CFM 

International, S.A. CFM56-3, CFM56-3B, and CFM56-3C turbofan engines. This AD 

requires removal from service of certain high-pressure turbine (HPT) disks manufactured 

by Global Material Solutions of Pratt & Whitney, at reduced maximum life limits. This 

AD was prompted by a report of a forging process error during manufacture of these HPT INITIALsls lG 

disks. We are issuing this AD to prevent uncontained release of multiple turbine blades, Jf> w 

damage to the engine, and damage to the airplane. 

DATES: This AD is effective [INSERT DATE OF PUBLICATION IN THE FEDERAL b== - .-

REGISTER]. 

The Director of the Federal Register approve 

PUBLICATION IN THE FEDERAL REGISTER]. 

We must receive comments on this AD by [INSERT DAT 

DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 

and 11.45, by any of the following methods: 
Re: Fw: NEED LIFE CALCULATION IN AD--Re: ACTION BY: 12/28/12-

2012-NE-43-AD- CFM International P&W HPT Disk Low Creep Properties. 

NFR - Version 3.3 0 

Vincent Bennett . ANE-007, Office of Regional Counsel to: Bnan Warner 01/09/2013 04:48PM 

Legal concurs. 

R, 

v 

Cc: Alan Rowe, James E Gray, John Golinski, Kenneth Steeves, Paul 

Donato 

Brian Warner Vince, Please review and provide comment I co ... 

From: 

To: 

Brian Warner/ANE/FM 

ANE-11 0, Standards Staff 

Vincent Bennett/ANE/FM@FM, 

0110812013 07:20:28 AM 

Cc: Alan Rowe/ANE/FM, James E Gray/ANE/FM@FM, John Golinski/ANE/FM, Kenneth 

Steeves/ANE/FM@FM, Paul Donato/ANE/FM@FM 

Date: 01/08/2013 07:20AM 

Subject: Re: Fw: NEED LIFE CALCULATION IN AD--Re: ACTION BY: 12/28/12- 2012-NE-43-AD- CFM 

International P&W HPT Disk Low Creep Properties. NFR- Version 3.3 

Vince, 

Please review and provide comment I concurrence. This routing remains at v3.3 as I had jumped a 

number earlier. 

12ne43i .doc 

Thanks ... 

Brian 

Brian M. Warner 

Federal Aviation Administration 

Engine and Propeller Directorate 

Standards Staff, ANE-110 

Technical Writer I Editor 

12 New England Executive Park 

Burlington, MA 01803 

781-238-7169 

brian.warner@faa.gov 

Click here to send us your feedback: 

http://www. faa. gov/about/office org/headq uarters offices/avs/stakeholder feed back/air/field/ 

Vincent Bennett Couple of nits. R, 0110712013 04:30:22 PM 
Re: ACTION BY: 12/19/12- 2012-NE-43-AD- CFM International P&W HPT 

Disk Low Creep Properties. NFR- Version 2.3 [;;): 

Alan Strom . to: Bnan Warner 12/20/2012 01:53PM 

Brian , 

Cc: Alan Rowe, Eugene Triozzi, James E Gray, John Golinski, Kenneth 

Steeves, Paul Donato, Peter O'Leary 

I concur with version 2.3. 

Regards, 

Alan 

Alan B. Strom 

Aerospace Engineer 

Aircraft Certification Service 

Engine & Propeller Directorate Standards Staff 

ANE-110 

12 New England Executive Park 

Burlington, MA 01803 

T (781) 238-7143 

F (781) 238-7199 

Brian Warner Ken/Peter/Alan, Please review and provide com ... 

From: Brian Warner/ANE/FAA 

ANE-11 0, Standards Staff 

12/20/2012 01 :40:06 PM 

To: 

Cc: 

Kenneth Steeves/ANE/FAA@FAA, Peter O'Leary/ANE/FAA@FAA, Alan Strom/ANE/FAA@FAA 

Alan Rowe/ANE/FAA, John Golinski/ANE/FAA, Paul Donato/ANE/FAA@FAA, James E 

Gray/ANE/FAA@FAA, Eugene Triozzi/ANE/FAA@FAA 

Date: 

Subject: 

Ken/Peter/Alan, 

12/20/2012 01 :40PM 

Re: ACTION BY: 12/19/12- 2012-NE-43-AD- CFM International P&W HPT Disk Low Creep 

Properties. NFR - Version 2.3 

Please review and provide comment I concurrence. Changes are highlighted in yellow. 

Paul, Your thoughts please on the AOA changes. 

[attachment "12ne43i.doc" deleted by Alan Strom/ANE/FAA] 

Thanks .. . 

Brian 

Brian M. Warner 

Federal Aviation Administration 

Engine and Propeller Directorate 

Standards Staff, ANE-11 0 
Re: ACTION BY: 12/19/12- 2012-NE-43-AD- CFM International P&W HPT 

Disk Low Creep Properties. NFR -Version 2.3 [) 

Peter O'Leary . 

AEA-BOS-AEG-67, Burlington, MA to: Bnan Warner 12/20/2012 01:53PM 

C . Alan Rowe, Alan Strom, Eugene Triozzi, James E Gray, John 

c. Golinski, Kenneth Steeves, Paul Donato 

Concur. 

Peter C. O'Leary 

Aviation Safety Inspector 

Propulsion Specialist 

12 New England Executive Park 

Burlington, MA 01830 

781-238-7890 

781-238-7898 fax 

781-439-5974 cell 

" Common sense is genius dressed in working clothes" 

Ralph Waldo Emerson 

We value your comments, please fill out the form below: 

http:/ /www.faa.gov/about/office _erg/headquarters_ offices/avs/stakeholder _ feedback/afs/field/sf _ 

aeg/ 

·-··· 

Brian Warner Ken/Peter/Alan, Please review and provide com .. . 12/20/2012 01:40:06 PM 

From: 

To: 

Cc: 

Date: 

Subject: 

Ken/Peter/Alan, 

Brian Warner/ANE/FAA 

ANE-11 0, Standards Staff 

Kenneth Steeves/ANE/FAA@FAA, Peter O'Leary/ANE/FAA@FAA, Alan Strom/ANE/FAA@FAA 

Alan Rowe/ANE/FAA, John Golinski/ANE/FAA, Paul Donato/ANE/FAA@FAA, James E 

Gray/ANE/FAA@FAA, Eugene Triozzi/ANE/FAA@FAA 

12/20/2012 01:40PM 

Re: ACTION BY: 12/19/12- 2012-NE-43-AD- CFM International P&W HPT Disk Low Creep 

Properties. NFR -Version 2.3 

Please review and provide comment I concurrence. Changes are highlighted in yellow. 

Paul, Your thoughts please on the AOA changes.