## DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket 

## No. FAA-2012-1289; Directorate Identifier 2012-NE-43-AD; Amendment 1 7 

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## obl 39-X...YXXX; AD**2013- ~**  

## RIN 2120-AA64 Airworthiness Directives; CFM International, S.A. Turbofan Engines**1?1or>.f~~P** 

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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 ofPratt & 

## Whitney, at reduced maximum life limits. This AD was prompted by a report of a forging process error during manufacture ofthese HPT I N ITI ALsl s l G 

## disks. We are issuing this AD to prevent uncontained release ofmultiple turbine blades , 

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# 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 ofthe 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 ofthe 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 Vincen t Bennett
. ANE -007, Office of Regional Co un se l 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/ai r /field/ Vincent Bennett Couple of ni ts . R, 0110712013 04 :30 : 22 P M

### 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/Ala n , 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 [) P ete r O'Leary
. AEA-BO S-AE G-6 7, 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 Ke n/ Pe ter /Alan , Please review and provide com .. . 

### 12/20/2012 01:40:06 PM Fro m: 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
.