DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[4910-13-P] 

[Docket No. FAA-2014-0540; Directorate Identifier 2014-NE-10-AD; Amendment 

39-18074; AD 2015-02-07] 

RIN 2120-AA64 

Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type 

Certificate previously held by Textron Lycoming Division, A VCO Corporation) 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule. 

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

number (SIN) Lycoming Engines reciprocating engines. This AD was prompted by 

propeller governor shaft set screws coming loose due to improper installation. We are 

issuing this AD to prevent the propeller governor shaft set screw from coming loose, 

causing damage to the engine and damage to the airplane. 

DATES: This AD is effective [INSERT DATE 35 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 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: 570-327-7101 ; 

Internet: 

www.lycoming.com/Lycoming/SUPPORT/TechnicalPublications/ServiceBulletins.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 781-238-7125. 

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 14-0540; 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 W12-140, 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 11590; phone: 516-228-7337; fax: 516-794-

5531 ; 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 certain SIN Lycoming Engines reciprocating engines. 

The NPRM published in the Federal Register on September 11 , 2014 (79 FR 54218). The 

NPRM was prompted by events of propeller governor shaft set screws coming loose due 

to improper installation. If the set screws come loose, the engine may lose oil resulting in 

damage to the engine and damage to the airplane. The NPRM proposed to require 

application of Loctite 290, or equivalent, to the threads of the propeller governor shaft set 

screw at each installation of the set screw in addition to the peening of crankcase hole 

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threads. We are issuing this AD to prevent the propeller governor shaft set screw from 

coming loose, causing damage to the engine and damage to the airplane. 

Comments 

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

received no comments on the NPRM (79 FR 54218, September 11 , 2014) or on the 

determination of the cost to the public. 

We did however; find that we directed the use ofLocTite 290, a commercial 

product by brand name. We changed the AD to remove the requirement to use any 

particular brand like LocTite 290, from this AD. 

Conclusion 

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

interest require adopting this AD as proposed. 

Related Service Information 

We reviewed Lycoming Engines Service Instruction No. 1343B, dated June 15, 

2007. The service instruction describes procedures for application of sealant for the 

propeller governor shaft set screw and the peening of crankcase hole threads. You can 

find this information at http://www.regulations.gov by searching for and locating Docket 

No. FAA-2014-0540. 

Costs of Compliance 

We estimate that this AD will affect about 2,330 engines installed on airplanes of 

U.S. registry. We also estimate that it will take about 0.1 hours per engine to comply with 

this AD. The average labor rate is $85 per hour. Prorated parts life will cost about $1 per 

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

$22,135. 

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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. 

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. 

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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): 

2015-02-07 Lycoming Engines (Type Certificate previously held by Textron 

Lycoming Division, A VCO Corporation): Amendment 39-18074 ; Docket 

No. FAA-2014-0540; Directorate Identifier 2014-NE-10-AD. 

(a) Effective Date 

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

PUBLICATION IN THE FEDERAL REGISTER]. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Lycoming Engines wide deck aerobatic reciprocating 

engines that have either an "A" or an "E" at the end of the serial number (e.g., L-12345-

51A, or L-12345-51E) and are equipped with a front-mounted propeller governor. 

Affected reciprocating engine models include, but are not limited to Lycoming Engines 

AEI0-320-DlB; AEI0-360-AlE, -A1 E6, -BlH, -HlB; AEI0-540-D4A5, -D4B5, 

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-D4D5, -L1B5, -L1B5D, -LIDS; AEI0-580-B1A; and I0-540-K1K5 (with aerobatic kit 

installed). 

(d) Unsafe Condition 

This AD was prompted by propeller governor shaft set screws coming loose due 

to improper installation. We are issuing this AD to prevent the propeller governor shaft 

set screw from coming loose, causing damage to the engine and damage to the airplane. 

(e) Compliance 

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

After the effective date ofthis AD, at each installation of the propeller governor 

shaft set screw, secure the set screw in place in accordance with the instructions of 

Lycoming Engines Service Instruction No. 1343B, dated June 15,2007. Use a threadlocking, anaerobic, single-component sealing compound that meets military specification 

Mil-S-46163A, Type III, GradeR, and peen the crankcase hole threads. 

(f) Alternative 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. 

(g) Related Information 

(1) For more information 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: 516-228-7337; fax: 516-

794-5531 ; email: norman.perenson@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. 

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

by this AD, unless the AD specifies otherwise. 

(i) Lycoming Engines Service Instruction No. 1343B, dated June 15, 2007. 

(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: 

http :I /www .I yearning. com/L ycoming/S UPPO R TIT echnica!Publications/Serviceinstructi o 

ns.aspx. 

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

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

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

(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, 

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

Issued in Burlington, Massachusetts, on January 13 , 2015. 

oudreau, 

Acting Directorate Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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