[4910-13-P] 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA-2014-0386; Directorate Identifier 2014-NE-09-AD; Amendment 

39-17897; AD 2014-12-52] 

RIN 2120-AA64 

Ainvorthiness Directives; Honeywell International Inc. (Type Certificate previously 

held by AlliedSignal Inc., Garrett Turbine Engine Company) Turbofan Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule; request for comments. 

SUMMARY: We are superseding emergency airworthiness directive (AD) 2014-12-52 

for all Honeywell International Inc. TFE73 1-4, -4R, -5AR, -5BR, -5R, -20R, -20AR, 

-20BR, -40, -40AR, -40R, -40BR, -50R, and -60 turbofan engines. Emergency AD 

2014-12-52 was sent previously to all known U.S. owners and operators of these engines. 

AD 2014-12-52 required, before further flight, a review of the engine logbook 

maintenance records to determine if any affected engines are installed. AD 2014-12-52 

also prohibited operation of an airplane with two or more affected engines that have 2"d 

stage low-pressure turbine (LPT2) blades with less than 250 operating hours since new. 

This AD retains the requirements of AD 2014-1 2-52 and clarifies the intent ofthe 

mandatory requirements. This AD was prompted by reports of LPT2 blade separations. 

We are issuing this AD to prevent LPT2 blade failure, multiple engine in-flight 

shutdowns, and damage to the airplane. 

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

PUBLICATION IN THE FEDERAL REGISTER]. 

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

DATE OF PUBLICA TJON 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: 202-493-225 1. 

• 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: Deliver to Mail address above between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal holidays. 

For service information identified in this AD, contact Honeywell International 

Inc., 111 S. 34111 Street, Phoenix, AZ 85034-2802; phone: (800) 601-3099; Internet: 

http://www.myacrospace.com. You may view this service information at the FAA, 

Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For 

information on the availability of this material at the FAA, call (78 1) 238-7125. 

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. F AA-20 14-0386; or in person at the Docket 

Operations Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal 

holidays. The AD docket contains this AD, the regulatory evaluation, any comments 

received, and other information. The street address for the Docket Operations 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: Joseph Costa, Aerospace Engineer, 

Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 

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Paramount Blvd., Lakewood, CA 90712-4137; phone: 562-627-5246; fax: 562-627-5210; 

email: joseph.costa@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On June 10, 2014, we issued Emergency AD 2014-12-52, which requires, before 

further flight, a review of the engine logbook maintenance records to determine if any 

affected engines are installed. Emergency AD 2014-1 2-52 also required for two-engine 

airplanes or for three-engine airplanes, that have two or more engines installed with LPT2 

blades installed that have less than 250 operating hours since new, remove all affected 

engines before further flight. Emergency AD 2014-12-52 was sent previously to all 

known U.S. owners and operators of these TFE731-4, -4R, -5AR, -5BR, -5R, -20R, 

-20AR, -20BR, -40, -40AR, -40R, -40BR, -50R, and -60 turbofan engines. This action 

was prompted by reports of LPT2 blade separations. Analysis indicates the presence of 

casting anomalies at or near the root of the LPT2 blade. This condition, if not corrected, 

could result in LPT2 blade failure, multiple engine in-flight shutdowns, and damage to 

the airplane. We are superseding Emergency AD 2014-12-52 to clarify the intent of 

paragraphs (e) and (f) of this AD. 

Relevant Service Information 

We reviewed Honeywell Alert Service Bulletin (ASB) No. TFE73 1-72-A3792, 

dated June 5, 2014; ASB No. TFE73 1-72-A5242, dated June 5, 2014; and ASB No. 

TFE73 1-72-A5243, dated June 5, 2014. The service information describes procedures for 

identifying affected engines and follow-on actions. 

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. 

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AD Requirements 

This AD requires, before further flight, a review of the engine logbook 

maintenance records to determine if any affected engines are installed. If any affected 

engines are installed, then this AD prohibits operation of an airplane with two or more 

affected engines that have LPT2 blades with less than 250 operating hours since new. 

Differences Between This AD and tbc Service Information 

Paragraphs (e)(2) and (e)(3) of this AD require that certain affected engines be 

removed before further flight. Honeywell ASB No. TFE731-72-A3792, dated June 5, 

2014; ASB No. TFE731 -72-A5242, dated June 5, 2014; and ASB No. TFE731-72-

A5243, dated June 5, 2014, for airplanes having only one affected engine installed, 

require no action at this time and may continue operation. 

Interim Action 

We consider this AD to be an interim action. We anticipate that further AD action 

will follow. 

FAA's Determination of the Effective Date 

An unsafe condition exists that requires the immediate adoption of this AD. The 

FAA has found that the risk to the flying public justifies waiving notice and comment 

prior to adoption of this rule because of compliance requirement before further flight. 

Therefore, we find that notice and opportunity for prior public comment are 

impracticable and that good cause exists for making this amendment effective in less than 

30 days. 

Comments Invited 

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

not preceded by notice and an opportunity for public comment. 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. F AA-20 14-0386; 

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Directorate Identifier 201 4-NE-09-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 50 engines installed on airplanes of U.S. registry. 

We also estimate that it will take about 18 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 $76,500. 

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 r AA Administrator. 

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

authority. 

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. 

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Regulatory Findings 

This AD wi ll 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. 

Adoption of the Amendment 

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

amends 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 adding the following new airworthiness directive 

(AD): 

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2014-12-52 Honeywell International Inc. (Type Certificate previously held by 

AlliedSignal Inc., Garrett Turbine Engine Company): Amendment 39-17897; Docket 

No. FAA-2014-0386; Directorate Identifier 2014-NE-09-AD. 

(a) Effective Date 

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

PUBLICATION TN THE FEDERAL REGISTER]. 

(b) Affected ADs 

This AD supersedes Emergency AD 2014-12-52, Directorate Identifier 2014-NE09-AD, dated June 10,2014. 

(c) Applicability 

This AD applies to all Honeywell International Inc. TFE731-4, -4R, -5AR, -5BR, 

-5R, -20R, -20AR, -20BR, -40, -40AR, -40R, -40BR, -50R, and -60 turbofan engines 

with 2"d stage low-pressure turbine (LPT2) blades, part number (PIN) 3075424-1, -2, or 

-3, installed. 

(d) Unsafe Condition 

This AD was prompted by reports of LPT2 blade separations. Analysis indicates 

the presence of casting anomalies at or near the root of the LPT2 blade. We are issuing 

this AD to prevent LPT2 blade failure, multiple engine in-flight shutdowns, and damage 

to the airplane. 

(e) Compliance 

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

(I) Before further flight, review engine logbook maintenance records to determine 

if any engine is installed that has LPT2 blade, PIN 3075424-1 , -2, or -3, installed with 

less than 250 operating hours since new on the blade. 

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(2) For two-engine airplanes that have two engines with LPT2 blades installed 

that have less than 250 operating hours since new, remove all affected engines before 

further flight. 

(3) For three-engine airplanes that have two or more engines with LPT2 blades 

installed that have less than 250 operating hours since new, remove all affected engines 

before further flight. 

( 4) After the effective date of this AD, do not install any engine that has installed 

in it LPT2 blades, PIN 3075424-1, -2, or -3, that have less than 250 operating hours since 

new. 

(f) Special F light Permit 

Special flight permits are permitted for one over-land ferry flight to a maintenance 

facility where engines can be removed. 

(g) Alternative Methods of Compliance (AMOCs) 

The Manager, Los Angeles Aircraft Certification Office, FAA, may approve 

AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. 

(h) Related Information 

(1) For more information about this AD, contact Joseph Costa, Aerospace 

Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane 

Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562-627-5246; 

fax: 562-627-521 0; email: joseph.costa@faa.gov. 

(2) Honeywell International Alert Service Bulletin (ASB) No. TFE731-72-A3792, 

dated June 5, 2014; ASB No. TFE731-72-A5242, dated June 5, 2014; and ASB No. 

TFE731-72-A5243, dated June 5, 2014, which are not incorporated by reference in this 

AD, can be obtained from Honeywell Intemationallnc., using the contact information in 

paragraph (h)(3) of this AD. 

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(3) For service information identified in this AD, contact Honeywell International 

Inc., 111 S. 341

h Street, Phoenix, AZ 85034-2802; phone: 800-601-3099; Internet: 

http://www .myaerospace.com. 

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

Directorate, 12 New England Executive Park, Burlington, MA. For information on the 

availability of this material at the FAA, call 781-238-7125. 

Issued in Burlington, Massachusetts, on July 7, 2014. 

Ann C. Mollica, 

Acting Assistant Directorate Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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