[Docket No. FAA-2016-2701; Directorate Identifier 2016-NE-03-AD; Amendment 

39-18440; AD 2016-06-09] 

RIN 2120-AA64 

Ainvorthiness Directives; Turbomeca S.A. Turboshaft Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule; request for comments. 

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

Turbomeca S.A. Makila 2A and 2Al turboshaft engines. This AD requires tightening the 

nut attaching the swivel union to the engine power turbine module M04. This AD was 

prompted by two occurrences of commanded in-flight shutdown following low oil 

pressure warning. We are issuing this AD to prevent loosening of the nut and oil leakage 

from the low-pressure oil system, which could lead to in-flight shutdown of the engine 

and forced landing. 

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

PUBLICATION IN THE FEDERAL REGISTER]. 

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

DATE OF PUBLICA TJON IN THE FEDERAL REGISTER]. 

ADDRESSES: You may send comments by any of the following methods: 
• Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal holidays. 

• Fax: 202-493-2251. 

For information on the availability ofthis 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-2016-2701. 

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:.2o 16-2701; 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 mandatory continuing airworthiness 

information (MCAI), 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: Besian Luga, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, 

Burlington, MA 01803; phone: 781-238-7750; fax: 781-238-7199; email: 

besian.luga@faa.gov. 

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any written relevant data, views, or arguments about this AD. Send your comments to an 

address listed under the ADDRESSES section. Include "Docket No. F AA-20 16-2701 ; 

Directorate Identifier 2016-NE-03-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 with FAA personnel 

concerning this AD. 

Discussion 

The European Aviation Safety Agency (EASA), which is the Technical Agent for 

the Member States of the European Community, has issued EASA AD 2016-0016, dated 

January 15,2016 (referred to hereinafter as " the MCAI"), to correct an unsafe condition 

for the specified products. The MCAI states: 

Two occurrences of commanded in-flight shut down following low 

oil pressure warning were reported. In both cases the nut attaching 

the swivel union to the power turbine module 04 was found 

completely loose. After further investigation, it was determined 

that the application ofTurbomeca Service Bulletin (SB) No. 298 

79 2831 may have led to incorrect torque application or loosening 

of the nut. 

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Docket No. FAA-2016-2701. 

FAA's Determination and Requirements ofThis AD 

This product has been approved by the aviation authority of France and is 

approved for operation in the United States. Pursuant to our bilateral agreement with the 

European Community, EASA has notified us of the unsafe condition described in the 

MCAI and service information referenced above. We are issuing this AD because we 

evaluated all information provided by EASA and determined the unsafe condition exists 

and is likely to exist or develop on other products of the same type design. This AD 

requires tightening the nut attaching the swivel union to the engine power turbine module 

M04. 

Related Service Information 

Turbomeca S.A. has issued Alert Mandatory Service Bulletin No. A298 79 2835, 

Version A, dated January 14, 2016. The service information describes procedures for 

tightening the nut attaching the swivel union to the engine power turbine module (M04). 

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 of this document 

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30 engine hours after the effective date of this AD. Therefore, we find that notice and 

opportunity for prior public comment arc impracticable and that good cause exists for 

making this amendment effective in less than 30 days. 

Costs of Compliance 

We estimate that this AD affects 10 engines installed on airplanes ofU.S. registry. 

We also estimate that it will take about 1 hour per engine to comply with this AD. The 

average labor rate is $85 per hour. No additional parts are required. Based on these 

figures, we estimate the total cost of the AD to U.S. operators to be $850. 

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 

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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 this AD: 

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

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

( 44 FR 1 I 034, 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 

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

Authority: 49 U.S.C. 106(g), 40113,44701. 

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Directorate Identifier 2016-NE-03-AD. 

(a) Effective Date 

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

PUBLICATION IN THE FEDERAL REGISTER). 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Turbomeca S.A. Makila 2A and 2A 1 turboshaft engines 

that have incorporated Turbomeca S.A. Service Bulletin No. 298 79 2831, Version B, 

dated November 13, 2015, or earlier. 

(d) Reason 

This AD was prompted by two occurrences of in-flight shutdowns as a result of 

the nut, attaching the swivel union to the power turbine module M04, coming loose. We are issuing this AD to prevent loosening of the nut, and oil leakage from the low pressure 

oil system, which could lead to in-flight shutdown of the engine and forced landing. 

(e) Actions and Compliance 

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

(1) Within 30 engine hours or 7 days after the effective date ofthis AD, 

whichever occurs first, apply 15 Newton-meters torque to the nut, part number 

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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. 

(g) Related Information 

(1) For more information about this AD, contact Besian Luga, Aerospace 

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

District Avenue, Burlington, MA 0 1803; phone: 781-238-7750; fax: 781-238-7199; 

email: besian.luga@faa.gov . 

(2) Refer to MCAI European A vi at ion Safety Agency AD 2016-0016, dated 

January 15, 2016, for more information. You may examine the MCAI in the AD docket 

on the Internet at http://www.regulations.gov by searching for and locating it in Docket 

No. FAA-2016-2701. 

(3) Turbomeca S.A. Alert Mandatory Service Bulletin No. A298 79 2835, 

Version A, dated January 14, 2016, which is not incorporated by reference in this AD, 

/ 

can be obtained from Turbomeca S.A., using the contact information in paragraph (g)( 4) 

of this AD. 

( 4) For service information identified in this AD, contact Turbomeca S.A., 40220 

Tamos, France; phone: 33 0 5 59 74 40 00; telex: 570 042; fax: 33 0 5 59 74 45 16. 

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None. 

Issued in Burlington, Massachusetts, on March 14,2016. 

Ann C. Mollica, 

Acting Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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