DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[4910-13-PJ 

!Docket No. FAA-2014-0940; Directorate Identifier 2014-NE-15-AD; Amendment 

39-18162; AD 2015-10-06] 

RIN 2120-AA64 

Ainvorthiness Directives; Lycoming E ngines Reciprocating Engines (Type 

Certificate previously held by Textron Lycoming Division, A VCO Corpor ation) 

AGENCY: f-ederal Aviation Administration (FAA), DOT. 

ACTION: Final rule. 

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

TI0-540-AJ I A reciprocating engines. This AD was prompted by several reports of 

cracked engine exhaust pipes. This AD requires inspection of the engine exhaust pipes 

for cracks and replacement of the turbocharger mounting bracket. We are issuing this AD 

to prevent failure of the exhaust system due to cracking, which could lead to uncontrolled 

engine fire, harmful exhaust gases entering the cabin resulting in crew incapacitation, and 

damage to the airplane. 

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

PUBLICATION TN THE FEDERAL REGfSTER]. 

The Director of the Federal Register approved the incorporation by reference of a certain 

publication listed in this AD as of [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

ADDRESSES: For service information identified in this AD, contact Lycoming Engines, 

652 Oliver Street, Williamsport, PA 17701 ; phone: 800-258-3279; fax: 570-327-710 I; 

Internet: 

wvvw .lycom i ng.com/Lycoming/S U PPOR T /Technical Pub! ications/ServiceBulleti ns.aspx. 
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 -238-71 25. 1t is also ava ilable on the Internet at 

http://www.regulations.gov by searching for and locati ng Docket No. FAA-20 14-0940. 

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 14-0940; 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 regulatory evaluation, any comments 

received, and other information. The address for the Docket Office (phone: 

800-647-5527) is Document Management facility, U.S. Department of Transportation, 

Docket Operations, M-30, West Building Ground Floor, Room W I2-1 40, 1200 New 

Jersey Avenue SE., Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: Norm Perenson, Aerospace Engineer, 

New York Aircraft Certification Office, FAA, Engine & Propeller Directorate, 1600 

Stewart Avenue, Suite 410, Westbury, NY 11 590; phone: 5 16-228-7337; fax : 5 16-794-

553 1; email: norman.perenson@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by 

adding an AD that would apply to certai n Lycoming T£0-540-AJ I A reciprocating 

engines. The NPRM published in the Federal Register on February 2, 201 5 (80 FR 5489). 

The NPRM was prompted by several reports of cracked engine exhaust pipes. The 

NPRM proposed to require inspection of the engine exhaust pipes for cracks and 

replacement of the turbocharger mounting bracket. We are issuing this AD to prevent 

fa il ure of the exhaust system due to cracking, which could lead to uncontrolled engine 

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fire, harmful exhaust gases entering the cabin resulting in crew incapacitation, and 

damage to the airplane. 

Related Service Information under CFR part 51 

We reviewed Lycoming Engines Mandatory Service Bulletin No. 6 14A, dated 

October 10, 20 14. This service bulletin describes procedures for exhaust system 

inspection and turbocharger mounting bracket replacement. It also provides for the return 

of the turbocharger mounting bracket to Lycoming. This service information is 

reasonably available at http://www.regulations.gov by searching for and locating Docket 

No. F AA-20 14-0940. See ADDRESSES for other ways to access this service 

information. 

Comments 

We gave the public the opportunity to pruticipate in developing this AD. We 

received no comments on the NPRM (80 FR 5489, f ebruary 2, 20 15) or on the 

determination of the cost to the public. 

Conclusion 

We reviewed the relevant data and determined that air safety and the public 

interest require adopting this AD as proposed. 

Costs of Compliance 

We estimate that this AD affects about 111 engines installed on airplanes of U.S. 

registry. We also estimate that it will take about 8 hours per engine to comply with this 

AD. The average labor rate is $85 per hour. Parts replacement will cost about $6,782 per 

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

$828,282. Our cost estimate is exclusive of possible warranty coverage. 

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 I 06, describes the authority of the FAA Administrator. 

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

authority. 

We are issuing this rulemaki ng under the authority described in Subtitle Vll, 

Part A, Subpart III, Section 4470 I: "General requirements." Under that section, Congress 

charges the FAA with promoting safe fl ight 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 131 32. This 

AD will not have a substantial direct e ffect 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, 1 certify that this AD: 

(I) 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 transpot1ation, Aircraft, Aviation safety, Incorporation by reference, Safety. 

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Adoption of the Amendment 

Accordingly, under the authori ty delegated to me by the Administrator, the FAA 

amends 14 CFR part 39 as follows: 

PART 39- AIRWORTHINESS DIRECTIVES 

I. The authority citation for part 39 continues to read as follows: 

Authority: 49 U.S.C. 106(g), 401 13, 4470 1. 

§ 39.13 )Amended) 

2. The FAA amends§ 39.13 by adding the following new airworthiness directive 

(AD): 

2015-10-06 Lycoming Engines (Type Certificate previously held by Textron 

Lycoming Division, A VCO Corporation): Amendment 39-18 162; Docket 

No. F AA-20 14-0940; Directorate Identifier 20 14-NE-1 5-AD. 

(a) Effective Date 

This AD is effective (INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION TN TH E FEDERAL REGISTERJ. 

(b) Affected ADs 

None. 

(c) Appli c~1bility 

This AD applies to all Lycoming TI0-540-AJ 1 A reciprocating engines listed by 

engine seria l number (SIN) in Figure I to paragraph (c) of this AD and to any TI0-540-

AJ 1 A reciprocating engine with a replacement turbocharger mounting bracket installed 

that was purchased between April 5, 2012 and May 29, 201 4. 

Figure 1 to Paragraph (c)- L ycoming TI0-540-AJIA Engine S/Ns 

L-6748-6 1 E L-13828-61 E L-13832-6 1 E L-13843-61 E 

L-138 17-61E L-1383 1-6 1 E L-13833-6 1 E L-1 3 84 7-61 E 

L-1 3819-61E L-1 3823-6 1 E L-1 3839-61 E L-13855-6 1 E 

L-1 3856-61E L-13 94 7-61 E L-140 11-61 E RL-2551-61 E 

5 
L-13857-6 1£ L-1 3948-61 £ L-1401 3-61 E RL-2848-61 E 

L-13866-61 E L-13949-61£ L-140 14-61 E RL-3450-61 E 

L-13867-61£ L-13950-61 E L-140 15-61 £ RL-4138-61 E 

L-13873-61 E L-1 3960-61 E L-140 I 7-61 E RL-7243-61 E 

L-13882-61 E L-13 961 -61 E L-14024-61 E RL-7512-6IE 

L-13883-61 E L-13962-61 E L-1 4025-61 E RL-8435-61 E 

L-13884-61£ L-1 3967-61 E L-14026-61 E RL-8767-61 E 

L-13885-61 E L-13973-61£ L-14028-61 E RL-8914-6 1 E 

L-13886-61 E L-1 3975-61£ L-14034-61 E RL-8979-61 E 

L-13895-61£ L-13976-6 1 E L-14054-61 E RL-9399-61 E 

L-1 3896-61 E L-13979-6 1 E L-14055-61 E RL-9466-61 E 

L-13898-61£ L-13981-61£ L-14056-61 E RL-9618-61 E 

L-13900-61 E L-13983-61 E L-14057-61 E RL-9663-61 E 

L-13902-61 E L-13984-61 E L-14062-61 E RL-1 0098-61 E 

L-13907-61 E L-13993-61 E L-14063-61 E RL-1 0 194-61 E 

L-1391 3-61E L-13996-61 E L-14066-61 E RL-1 0249-61 E 

L-13915-61£ L-1 3997-61£ L-14067-61£ RL- 1 061 5-6 1 E 

L- 13930-61 E L-1 3998-61£ L-14069-61 E RL-11 011 -61 E 

L-1 3931-61 E L-1 3999-61 E L- 14071 -61 E RL-12121-61 E 

L-13934-6 1 E L-14000-61 E L-14076-61 E RL-12163-6 1E 

L-13936-61E L-1400 I -6 1 E L-14077-61 E RL-12343-61 E 

L-13938-6 1 E L-14003-6 1 E RL-1726-61 E RL-13352-61 E 

L-13939-61 E L-1 4004-61 E RL-1 81 0-61 E RL-1360 1-61 E 

L-13 946-6 1 E L-14005-6 1 E RL-1862-61£ 

(d) Unsafe Condition 

This AD was prompted by several reports of cracked engine exhaust pipes. We 

are issuing this AD to prevent fai lure of the exhaust system due to cracking, which could 

lead to uncontrolled engine fire, hann ful exhaust gases entering the cabin resulting in 

crew incapacitation, and damage to the airpl ane. 

(e) Compliance 

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

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( 1) For a ffected engines with an SIN listed in Figure 1 to paragraph (c) of this AD 

with 400 hours or less time since new (TSN) or time since last overhaul (TSLO), and for 

any TT0-540-AJ 1 A reciprocating engine with a replacement turbocharger mounting 

bracket installed that was purchased between Apri I 5, 20 12 and May 29, 20 14, that has 

accumulated 400 hours or less time-in-service (TIS), within 25 hours after the effective 

date of this AD, replace the turbocharger mounti ng bracket with a part eligible for 

insta ll ation, and inspect the exhaust pipes tor cracks. Use Lycoming Engines Mandatory 

Service Bulletin (MSB) No. 614A, dated October I 0, 20 I 4, Exhaust System Disassembly 

and Removal, paragraphs 1 through 22 to replace the bracket, and Exhaust System 

Inspection, paragraphs l through 5 to do the inspection. 

(2) For affected engines with an SIN listed in Figure I to paragraph (c) of this AD 

with more than 400 hours TSN or TSLO, and for any TI0-540-AJ] A reciprocating 

engine with a replacement turbocharger mounting bracket installed that was purchased 

between April 5, 20 12 and May 29, 20 14, that has accumulated more than 400 hours TIS, 

replace the turbocharger mounting bracket with a part eligible for installation, and inspect 

the exhaust pipes for cracks at the next engine overhaul, separation of the crankcase 

ha lves, or twelve years from the effecti ve date of this AD, whichever comes first. Use 

Lycoming Engines MSB No. 614A, elated October 10,2014, Exhaust System 

Disassembly and Removal, paragraphs I through 22 to replace the bracket, and Exhaust 

System Inspection, paragraphs 1 through 5 to do the inspection. 

(f) Installation Prohibition 

After the effective date of this AD, do not return to service any TI0 -540-AJ 1 A 

engine with a turbocharger mounti ng bracket that was removed from an engine identilied 

in Figure 1 to paragraph (c) of this AD or that was purchased between Apri l 5, 201 2 and 

May 29, 2014. 

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(g) Credit for Previous Action 

(1) If, before the effective date of this AD, you replaced the turbocharger 

mounting bracket with one eligible tor installation you may take credit for your prior 

corrective action. No further turbocharger mounting bracket replacement is required. 

(2) If, before the effective date of this AD, you performed the crack inspection 

using either of the following: 

(i) Lycoming Engines MSB No. 6 14A, dated October 10, 2014, Exhaust System 

Inspection, paragraphs 1 through 5, or 

(ii) Cessna Service Letter No. S EL-78-0 1, dated May 30, 20 14, you may take 

credit for your prior corrective action. No further inspection is required. However, you 

must still replace the turbocharger mounting bracket. 

(h) Alterna tive Methods of Compliance (AMOCs) 

The Manager, New York Aircraft Certification Office, FAA, may approve 

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

(i) Related Informa tion 

For more infonnation about this AD, contact Norm Perenson, Aerospace 

Engineer, New York Aircraft Certification Office, FAA, Engine & Propeller Directorate, 

1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 5 16-228-7337; fax: 516-

794-553 1; email: norman.perenson@faa.gov. 

U) Material Incorpor a ted 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 5 1. 

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

by this AD, unless the AD specifies otherwise. 

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(i) Lycoming Engines Mandatory Service Bulletin No. 614A, dated October 10, 

2014. 

(ii) Reserved. 

(3) For Lycoming Engines service information identified in this AD, contact 

Lycoming Engines, 652 Oliver Street, Williamsport, PA 17701 ; phone: 800-258-3279; 

fax: 570-327-7101; Internet: 

www.lycoming.com/Lycoming/SUPPORT/TechnicalPublications/ServiceBulletins.aspx. 

(4) You may view this service infom1ation at 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. 

(5) You may view this service information that is incorporated by reference at the 

National Archives and Records Administration (NARA). For information on the 

availability ofthis material at NARA, call 202-741 -6030, or go to: 

http://www.archives.gov/federal-register/cfr/ibr-locations.html. 

Issued in Burlington, Massachusetts, on May 12, 2015. 

Colleen M. D' Alessandro, 

Assistant Directorate Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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