[4910-13-P] 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

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

39-18591; AD 2016-14-10] 

.RIN 2120-AA64 

Airworthiness Directives; CFM International, S.A. Turbofan Engines Modified by 

Supplemental Type Certificate SE00034EN 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule; request for comments. 

SUMMARY: We are superseding airworthiness directive (AD) 2013-02-02 for certain 

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

2013-02-02 required 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 corrects the serial numbers (SINs) listed in AD 2013-02-02. This AD was 

prompted by reports that certain HPT disk SINs in AD 2013-02-02 and in certain Pratt & 

Whitney service information are incorrect. We are issuing this AD to prevent 

uncontained release of multiple turbine blades, damage to the engine, and damage to the 

airplane. 

DATES: This AD is effective [INSERT DATE 15 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 
The Director of the Federal Register approved the incorporation by reference of a 

certain publication listed in this AD as of [INSERT DATE 15 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

We must receive any comments on this AD by [INSERT DATE 45 DAYS 

AFTER 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: 

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202-493-2251. 

• Mail: U.S. Department of Transportation, Docket Operations, M-30, West 

Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 

20590. 

• Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, 

West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., 

Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in this AD, contact Pratt & Whitney, 400 Main 

St., East Hartford, CT 06108; phone: 860-565-7700; fax: 860-565-1605. You may view 

this service information at the FAA, Engine & Propeller Directorate, 1200 District 

A venue, Burlington, MA 01803. For information on the availability of this material at the 

FAA, call 781-238-7125. It is also available on the Internet at http://www.regulations.gov 

by searching for and locating Docket No. FAA-2012-1289. 

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Examining the AD Docket 

You may examine the AD docket on the Internet at http://www.regulations.gov by 

searching for and locating Docket No. FAA-2012-1289; or in person at the Docket 

Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal 

holidays. The AD docket contains this AD, the mandatory continuing airworthiness 

information, regulatory evaluation, any comments received, and other information. The 

address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES section. 

Comments will be available in the AD docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: Kenneth Steeves, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 

District Avenue, Burlington, MA 01803; phone: 781-238-7765; fax: 781-238-7199; 

email: kenneth.steeves@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On January 14, 2013, we issued AD 2013-02-02, Amendment 39-17323 (78 FR 

5712, January 28, 2013), ("AD 2013-02-02") for all CFM56-3, CFM56-3B, and 

CFM56-3C turbofan engines modified by Supplemental Type Certificate SE00034EN, 

with certain HPT disks, installed. AD 2013-02-02 required removal from service of 

certain high-pressure turbine (HPT) disks manufactured by Global Material Solutions of 

Pratt & Whitney, at reduced maximum life limits. AD 2013-02-02 resulted from a report 

of a forging process error during manufacture of these HPT disks. We issued AD 2013-

02-02 to prevent uncontained release of multiple turbine blades, damage to the engine, 

and damage to the airplane. 

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Actions Since AD 2013-02-02 was Issued 

Since we issued AD 2013-02-02, we received reports that certain HPT disk SINs 

GLKBAA9307, GLKBAA9335, GLKBAA9404, GLKBAA9407, and GLKBAA9409, in 

AD 2013-02-02 and in certain Pratt & Whitney service information are incorrect. The 

correct SINs are: GKLBAA9307, GKLBAA9335, GKLBAA9404, GKLBAA9407, and 

GKLBAA9409. 

Related Service Information under 1 CFR Part 51 

We reviewed Pratt & Whitney Corp. Special Instruction No. 6F-12, Revision A, 

dated May 17, 2016. The Special Instruction describes procedures for reducing the 

maximum life limit for affected HPT disks. This service information is reasonably 

available because the interested parties have access to it through their normal course of 

business or by the means identified in the ADDRESSES section. 

FAA's Determination 

We are issuing this AD because we evaluated all the relevant information and 

determined the unsafe condition described previously is likely to exist or develop in other 

products of the same type design. 

AD Requirements 

This AD requires removal from service of affected HPT disks at certain 

recalculated reduced maximum life limits. 

FAA's Justification and Determination of the Effective Date 

No domestic operators use this product. Therefore, we find that notice and 

opportunity for prior public comment are unnecessary and that good cause exists for 

making this amendment effective in less than 30 days. 

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Comments Invited 

This AD is a final rule that involves requirements affecting flight safety, and we 

did not provide you with notice and an opportunity to provide your comments before it 

becomes effective. However, we invite you to send any written data, views, or arguments 

about this AD. Send your comments to an address listed under the ADDRESSES section. 

Include "Docket No. FAA-2012-1289; Directorate Identifier 2012-NE-43-AD" at the 

beginning of your comments. We specifically invite comments on the overall regulatory, 

economic, environmental, and energy aspects of this AD. We will consider all comments 

received by the closing date and may amend this AD because of 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 we receive about this AD. 

Costs of Compliance 

We estimate that this AD affects 0 engines installed on airplanes of U.S. registry. 

We also estimate that it will take about 61 hours per engine to comply with this AD. The 

average labor rate is $85 per hour. Required parts cost about $0 per engine. Based on 

these figures, we estimate the cost of this AD on U.S. operators to be $0. 

Authority for this Rulemaking 

Title 49 of the United States Code specifies the FAA's authority to issue rules on 

aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. 

Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's 

authority. 

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We are issuing this rulemaking under the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701, "General requirements." Under that section, Congress 

charges the FAA with promoting safe flight of civil aircraft in air commerce by 

prescribing regulations for practices, methods, and procedures the Administrator finds 

necessary for safety in air commerce. This regulation is within the scope of that authority 

because it addresses an unsafe condition that is likely to exist or develop on products 

identified in this rulemaking action. 

Regulatory Findings 

This AD will not have federalism implications under Executive Order 13132. This 

AD will not have a substantial direct effect on the States, on the relationship between the 

national government and the States, or on the distribution of power and responsibilities 

among the various levels of government. 

For the reasons discussed above, I certify that this AD: 

(1) Is not a "significant regulatory action" under Executive Order 12866, 

(2) Is not a "significant rule" under DOT Regulatory Policies and Procedures 

( 44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation in Alaska to the extent that it justifies 

making a regulatory distinction, and 

( 4) Will not have a significant economic impact, positive or negative, on a 

substantial number of small entities under the criteria of the Regulatory Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 

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Adoption of the Amendment 

Accordingly, under the authority delegated to me by the Administrator, the FAA 

amends part 39 of the Federal Aviation Regulations (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 removing airworthiness directive (AD) 2013-02-

02, Amendment 39-17323 (78 FR 5712, January 28, 2013), ("AD 2013-02-02"), and 

adding the following new AD: 

2016-14-1 0 CFM International, S.A. Turbofan Engines Modified by Supplemental 

Type Certificate SE00034EN: Amendment 39-18591; Docket No. FAA-2012-1289; 

Directorate Identifier 2012-NE-43-AD. 

(a) Effective Date 

This AD is effective [INSERT DATE 15 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

(b) Affected ADs 

This AD supersedes AD 2013-02-02. 

(c) Applicability 

This AD applies to CFM International, S.A. CFM56-3, CFM56-3B, and 

CFM56-3C turbofan engines, modified by Supplemental Type Certificate SE00034EN, 

with a high-pressure turbine (HPT) disk, part number (PIN) 880026, serial number (SIN) 

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GKLBAA9307, GKLBAA9335, GKLBAA9404, GKLBAA9407, or GKLBAA9409, 

installed. 

(d) Unsafe Condition 

This AD was prompted by reports that certain HPT disk serial numbers in AD 

20 13-02~02 and in certain Pratt & Whitney service information are incorrect. We are 

issuing this AD to prevent uncontained release of multiple turbine blades, damage to the 

engine, and damage to the airplane. 

(e) Compliance 

Comply with this AD within the compliance times specified, unless already done. 

(1) For CFM56-3, CFM56-3B, and CFM56-3C turbofan engines operating to 

20,100 lbs maximum takeoff (MTO) thrust, remove the HPT disk from service on or 

before accumulating 8,000 cycles-since-new (CSN). 

(2) For CFM56-3B and CFM56-3C turbofan engines operating to 22,100 lbs 

MTO thrust, remove the HPT disk from service on or before accumulating 8,000 CSN. 

(3) For CFM56-3C turbofan engines operating to 23,500 lbs MTO thrust, remove 

the HPT disk from service on or before accumulating 4,000 CSN. 

( 4) For HPT disks thc~.t have been used in multiple models or thrust installations, 

use the formula in the ADDED DATA section of Pratt & Whitney Special Instruction 6F12, Revision A, dated May 1 7, 2016 to calculate the remaining life on the disk. 

(f) Alternative Methods of Compliance (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. 

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(g) Related Information 

For more information about this AD, contact Kenneth Steeves, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 

District Avenue, Burlington, MA 01803 ; phone: 781-238-7765; fax : 781-238-7199; 

email: kenneth.steeves@faa.gov. 

(h) Material Incorporated by Reference 

(1) The Director of the Federal Register approved the incorporation by reference 

(IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information as applicable to do the actions required 

by this AD, unless the AD specifies otherwise. 

(i) Pratt & Whitney Corp. Special Instruction No. 6F-12, Revision A, dated May 

17, 2016. 

(ii) Reserved. 

(3) For Pratt & Whitney service information identified in this AD, contact Pratt & 

Whitney, 400 Main St., East Hartford, CT 06108; phone: 860-565-7700; fax: 860-565-

1605. 

( 4) You may view this service information at FAA, Engine & Propeller 

Directorate, 1200 District A venue, Burlington, MA 01803. For information on the 

availability of this material at the FAA, call 781-23 8-7125. 

(5) You may view this service information at the National Archives and Records 

Administration (NARA). For information on the availability of this material at NARA, 

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call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on July 11, 2016. 

Colleen M. D' Alessandro, 

Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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