[4910-13-P] DEPARTMENT OF TRANSPORTATION FederalAviation Administration 14 CFRPart39 [Docket No. FAA-2016-2859; DirectorateIdentifier2016-NE-04-AD; Amendment 39-18536; AD 2016-11-09] RIN 2120-AA64 Airworthiness Directives; Turbomeca S.A. TurboshaftEngines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for Turbomeca S.A. Arriel 1D and 1D1 turboshaft engines with a pre-modification (mod) TU357 gas generator module (M03), installed. This AD requires removing the pre-modification (mod) TU357 gas generator module (M03) and replacing with a part eligible for installation. This AD was prompted by reports ofdivergent rubbing between the piston shaft small diameter labyrinth and the rear bearing support. We are issuing this AD to prevent failure ofthe labyrinth seal and engine, in-flight shutdown, and loss ofcontrol of the helicopter. DATES: This AD becomes effective [INSERT DATE 35 DAYS AFTERDATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: For service information identified in this final rule, contact Turbomeca S.A., 40220 Tamos, France; phone: 33 (0)5 59 74 40 00; fax: 33 (0)5 59 74 45 15. You may viewthis service information at the FAA, Engine & Propeller Directorate, 1200District Avenue, Burlington, MA. For information onthe availability ofthis material at the FAA, cal1781-238-7125. Examining the AD Docket You may examine the AD docket onthe Internet at http:/ /www.regulations.gov by searching for and locating DocketNo. FAA-2016-2859; or inperson 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 (MCAI), 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 ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 NewJersey Avenue SE., Washington, DC 20590. FORFURTHER INFORMATION CONTACT: Philip Haberlen, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-7199; email: philip.haberlen@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice ofproposed rulemaking (NPRM) to amend 14 CFRpart 3 9 by adding an AD that would apply to the specified products. The NPRM was published in the FederalRegister on March 1, 2016 (81 FR 10544). The NPRMproposedto correct

an unsafe condition for the specified products.

2The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States ofthe European Community, has issued EASA AD 2016-0009, dated January 13, 2016 (referred to hereinafter as "the MCAI"), to correct an unsafe condition for the specified products. The MCAI states: Some cases ofdivergent rubbing between the piston shaft small diameter labyrinth and the rear bearing support have been reported. This condition, ifnot corrected, could lead to an uncommanded engine in-flight shutdown.

You may obtain further informationby examining the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating DocketNo. FAA-2016-2859. Comments We gave the public the opportunity to participate in developing this AD. We received no comments onthe NPRM (81 FR 10544, March 1, 2016). Conclusion We reviewed the available data and determined that air safety and the public interest require adopting this AD as proposed. Related Service Information Turbomeca S.A. has issued Mandatory Service Bulletin (MSB) No. 292 72 1357, Version B, dated November 12, 2015. The MSB describes procedures for installing a post-modification (mod) TU357 gas generator module (M03). This service information is reasonably available because the interested parties have access to it through their normal

course ofbusiness orbythe means identified inthe ADDRESSES section.

3Costs ofCompliance We estimate that this proposed AD affects 426 engines installed on helicopters of U.S. registry. We also estimate that it would take about 40 hours per engine to comply with this proposed AD. The average laborrate is $85 perhour. Required parts cost about $16,500 per engine. Based on these figures, we estimate the cost ofthis proposed AD on U.S. operators to be $8,477,400. Authority for This Rulemaking Title 49 ofthe United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority ofthe FAA Administrator.

"Subtitle VII: Aviation Programs," describes in more detail the scope ofthe 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 withpromoting safe flight ofcivil 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 ofthat authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect onthe States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels ofgovernment. 4For the reasons discussed above, I certify this AD: (1) Is not a "significantregulatory action" under Executive Order 12866, (2) Is not a "significantrule" underthe DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska to the extentthat itjustifies making a regulatory distinction, and (4) Will not have a significant economic impact, positive ornegative, on a substantial number ofsmall entities under the criteria ofthe Regulatory Flexibility Act. List ofSubjects in 14 CFRPart 39 Airtransportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption ofthe Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFRpart 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): 2016-11-09 Turbomeca 

### S.A.: Amendment 39-18536; DocketNo. FAA-2016-2859; Directorate Identifier 20 16-NE-04-AD.



### 5(a) Effective Date This AD becomes effective [INSERT DATE 35 DAYS AFTERDATE OF PUBLICATION IN THE FEDERAL REGISTER]. (b) Affected ADs None. (c) Applicability This AD applies to all Arriel 

### 1 D and 1 D 1turboshaft engines with a premodification (mod) TU357 gas generator module (M03), installed. (d) Reason This AD was prompted by reports ofdivergent rubbing betweenthe piston shaft small diameter labyrinth and the rear bearing support. We are issuing this AD to prevent failure ofthe labyrinth seal and engine, in-flight shutdown, and loss ofcontrol ofthe helicopter. (e) Actions and Compliance Comply with this AD within the compliance times specified, unless already done. (1) Within 4 months or 240 engine operating hours afterthe effective date ofthis AD, whichever occurs later, remove the pre-modification (mod) TU357 gas generator module (M03) from service and replace with a part eligible for installation. (2) Reserved. (f) Alternative Methods ofCompliance (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.

6(g) Related Information (1) Formore information about this AD, contact Philip Haberlen, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-7199; email: philip.haberlen@faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2016-0009, dated January 13, 2016, for more information. You may examine the MCAI in the AD docket

onthe Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2016-2859. (3) Turbomeca S.A. Mandatory Service Bulletin (MSB) No. 292 72 1357, Version B, dated November 12, 2015, which is not incorporated by reference in this AD,

canbe obtained from Turbomeca S.A., using the contact information in paragraph (g)(4) ofthis AD. (4) Turbomeca S.A., 40220 Tamos, France; phone: 33 (0)5 59 74 40 00; fax: 33 (0)5 59 74 45 15. (5) You may view this service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information onthe availability of this material at the FAA, call 781-238-7125. (h) Material Incorporated by Reference None.

Issued in Burlington, Massachusetts, onMay 23, 2016.

Colleen M. D'Alessandro, Manager, Engine & Propeller Directorate, Aircraft Certification Service. 7(g) Related Information (1) For more information about this AD, contact Philip Haberlen, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 DistrictAvenue, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-7199; email: philip.haberlen@faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2016-0009, dated January 13, 2016, for more information. You may examine the MCAI in the AD docket

onthe Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2016-2859. (3) Turbomeca S.A. Mandatory Service Bulletin (MSB) No. 292 72 1357, Version B, dated November 12, 2015, which is not incorporated by reference in this AD,

can be obtained from Turbomeca S.A., using the contact information in paragraph (g)(4) ofthis AD. (4) Turbomeca S.A., 40220 Tamos, France; phone: 33 (0)5 59 74 40 00; fax: 33 (0)5 59 74 45 15. (5) You may viewthis service information at the FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. For information onthe availability of this material at the FAA, call 781-238-7125. (h) Material Incorporated by Reference None.

Issued in Burlington, Massachusetts, on May 23, 2016.

Colleen M. D'Alessandro, Manager, Engine & Propeller Directorate, Aircraft Certification Service. 7