Airworthiness Directives; Turbomeca S.A. Turboshaft Engines, 9868-9870 [2014-03673]

Download as PDF 9868 Proposed Rules Federal Register Vol. 79, No. 35 Friday, February 21, 2014 This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules. DEPARTMENT OF TRANSPORTATION For service information identified in this AD, contact Turbomeca, S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; telex: 570 042; fax: 33 (0)5 59 74 45 15. 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. Federal Aviation Administration Examining the AD Docket 14 CFR Part 39 You may examine the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2006– 23809; 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 proposed AD, the mandatory continuing airworthiness information, the regulatory evaluation, any comments received, and other information. The street 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: Anthony W. Cerra Jr., Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781– 238–7128; fax: 781–238–7199; email: anthony.cerra@faa.gov. SUPPLEMENTARY INFORMATION: [Docket No. FAA–2006–23809; Directorate Identifier 2005–NE–52–AD] RIN 2120–AA64 Airworthiness Directives; Turbomeca S.A. Turboshaft Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to supersede airworthiness directive (AD) 2007–10– 07, which applies to all Turbomeca S.A. Arriel 2B, 2B1, and 2B1A turboshaft engines. AD 2007–10–07 currently requires an inspection of the splines of the coupling assembly and the hydromechanical metering unit (HMU) drive gear shaft for wear. This proposed AD would require the same inspection and expand the affected population. This proposed AD would also remove Arriel 2B1A engines from the applicability. We are proposing this AD to prevent failure of the HMU drive gear shaft, which could lead to damage to the engine and damage to the airplane. DATES: We must receive comments on this proposed AD by April 22, 2014. 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 https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • 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. rmajette on DSK2TPTVN1PROD with PROPOSALS-1 SUMMARY: VerDate Mar<15>2010 13:38 Feb 20, 2014 Jkt 232001 Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2006–23809; Directorate Identifier 2005–NE–52–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 Discussion On May 4, 2007, we issued AD 2007– 10–07, Amendment 39–15048 (72 FR 26711, May 11, 2007). AD 2007–10–07 applies to all Turbomeca Arriel S.A. 2B, 2B1, and 2B1A turboshaft engines. AD 2007–10–07 requires an initial inspection of the splines of the coupling assembly and the HMU drive gear shaft for wear as well as an additional inspection every time the HMU is removed. AD 2007–10–07 resulted from reports of in-flight shutdown resulting from deterioration of the splines of the coupling assembly and the HMU drive gear shaft. We issued AD 2007–10–07 to prevent failure of the HMU drive gear shaft, which could lead to damage to the engine, and damage to the airplane. Actions Since Existing AD Was Issued Since we issued AD 2007–10–07, Amendment 39–15048 (72 FR 26711, May 11, 2007), we received a report of HMU drive gear shaft spline wear on Turbomeca S.A. Arriel 2 engines. Also, since we issued AD 2007–10–07, the European Aviation Safety Agency issued AD 2013–0170, dated July 30, 2013. AD 2013–0170 requires inspection of the coupling assembly splines and the HMU drive gear shaft for wear. AD 2013–0170 also adds the Arriel 2C, 2C1, 2C2, 2S1, and 2S2 engines to the list of affected engines. FAA’s Determination We are proposing 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. Proposed AD Requirements This proposed AD would retain the requirements of AD 2007–10–07, Amendment 39–15048 (72 FR 26711, May 11, 2007) except it would eliminate the additional inspection when the HMU is compliant after the 500 hour inspection and the HMU assembly is unchanged. This proposed AD would expand the applicability to include Turbomeca S.A. Arriel 2C, 2C1, 2C2, 2S1, and 2S2 engines, while removing Arriel 2B1A engines. Costs of Compliance We estimate that this proposed AD would affect 470 engines installed on aircraft of U.S. registry. We also estimate E:\FR\FM\21FEP1.SGM 21FEP1 Federal Register / Vol. 79, No. 35 / Friday, February 21, 2014 / Proposed Rules The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: that it would take about 2 hours per engine to comply with this proposed AD. The average labor rate is $85 per hour. No parts are required. Based on these figures, we estimate the cost of this proposed AD on U.S. operators to be $79,900. rmajette on DSK2TPTVN1PROD with PROPOSALS-1 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 We have determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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 the proposed regulation: (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 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. We prepared a regulatory evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. VerDate Mar<15>2010 13:38 Feb 20, 2014 Jkt 232001 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 removing airworthiness directive (AD) 2007–10–07, Amendment 39–15048 (72 FR 26711, May 11, 2007), and adding the following new AD: ■ Turbomeca S.A: Docket No. FAA–2006– 23809; Directorate Identifier 2005–NE– 52–AD. (a) Comments Due Date The FAA must receive comments on this AD action by April 22, 2014. (b) Affected ADs This AD supersedes AD 2007–10–07, Amendment 39–15048 (72 FR 26711, May 11, 2007). (c) Applicability This AD applies to all Turbomeca S.A. Arriel 2B, 2B1, 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines. (d) Unsafe Condition This AD was prompted by a report of an additional case of wear of the hydromechanical metering unit (HMU) drive gear shaft splines on both Turbomeca S.A. Arriel 2 engines on a twin-engine helicopter. We are issuing this AD to prevent failure of the HMU drive gear shaft, which could lead to damage to the engine and damage to the aircraft. (e) Compliance Comply with this AD within the compliance times specified, unless already done. (1) Arriel 2B and 2B1 Engines (i) If on the effective date of this AD the HMU has 500 or more operating hours since new or since last overhaul, then within 25 HMU operating hours from the effective date of this AD, inspect the high-pressure (HP) pump drive gear shaft splines and coupling shaft assembly splines. Use paragraph 2.B.(1)(b) of Turbomeca S.A. Mandatory Service Bulletin (MSB) No. 292 73 2812, Version G, dated June 24, 2013, to do your inspection. (ii) If on the effective date of this AD the HMU has less than 500 operating hours since new or since last overhaul, then inspect the HP pump drive gear shaft splines and coupling shaft assembly splines between 500 and 525 operating hours since new or since last overhaul. Use paragraph 2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 2812, Version G, dated June 24, 2013, to do your inspection. PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 9869 (2) Arriel 2C, 2C1, 2C2, 2S1, and 2S2 Engines (i) If on the effective date of this AD the HMU has 500 or more operating hours since new, since last overhaul, or if HMU operating hours are unknown, then within 200 HMU operating hours from the effective date of this AD, inspect the HP pump drive gear shaft splines and coupling shaft assembly splines. Use paragraph 2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 2822, Version F, dated June 21, 2013, to do your inspection. (ii) If on the effective date of this AD the HMU has more than 300 but less than 500 operating hours since new or since last overhaul, then within 225 HMU operating hours, but no earlier than 500 or later than 700 HMU operating hours from the effective date of this AD, inspect the HP pump drive gear shaft splines and coupling shaft assembly splines. Use paragraph 2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 2822 Version F, dated June 21, 2013, to do your inspection. (iii) If on the effective date of this AD the HMU has 300 operating hours or less since new or since last overhaul, then inspect the HP pump drive gear shaft splines and coupling shaft assembly splines between 500 and 525 HMU operating hours since new or since last overhaul. Use paragraph 2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 2822, Version F, dated June 21, 2013, to do your inspection. (f) Credit for Previous Actions If, before the effective date of this AD, you inspected your HMU after 500 HMU operating hours since new or since last overhaul using an earlier version of Turbomeca S.A. MSB No. 292 73 2822, Version F, dated June 21, 2013, for 2C, 2C1, 2C2, 2S1 and 2S2 engines, or MSB No. 292 73 2812, Version G, dated June 24, 2013, for 2B or 2B1 engines, you have met the requirements of this AD. (g) Installation Prohibition After the effective date of this AD, do not install any HMU onto any engine, nor install any engine onto any helicopter with an HMU affected by this AD, unless the HMU passed the inspection required by paragraph (e)(1) of this AD for Arriel 2B and 2B1 engines or paragraph (e)(2) of this AD for Arriel 2C, 2C1, 2C2, 2S1, and 2S2 engines. (h) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make your request. (i) Related Information (1) For more information about this AD, contact Anthony W. Cerra, Jr., Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781–238–7128; fax: 781–238– 7199; email: anthony.cerra@faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2013–0170, dated July 30, 2013, for related information. You may examine the MCAI in the AD docket on the Internet at https://www.regulations.gov/ #!docketDetail;D=FAA-2006-23809. E:\FR\FM\21FEP1.SGM 21FEP1 9870 Federal Register / Vol. 79, No. 35 / Friday, February 21, 2014 / Proposed Rules (3) Turbomeca S.A. MSB No. 292 73 2822, Version F, dated June 21, 2013, and Turbomeca S.A. MSB No. 292 73 2812, Version G, dated June 24, 2013, pertain to the subject of this AD and can be obtained from Turbomeca S.A. using the contact information in paragraph (i)(4) of this AD. (4) For service information identified in this AD, contact Turbomeca, S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; telex: 570 042; fax: 33 (0)5 59 74 45 1. (5) 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 February 11, 2014. Robert J. Ganley, Acting Assistant Directorate Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2014–03673 Filed 2–20–14; 8:45 am] BILLING CODE 4910–13–P I. General Information ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 180 [EPA–HQ–OPP–2013–0023; FRL–9904–98] Receipt of Several Pesticide Petitions Filed for Residues of Pesticide Chemicals in or on Various Commodities Environmental Protection Agency (EPA). ACTION: Notice of filing of petitions and request for comment. AGENCY: This document announces the Agency’s receipt of several initial filings of pesticide petitions requesting the establishment or modification of regulations for residues of pesticide chemicals in or on various commodities. DATES: Comments must be received on or before March 24, 2014. ADDRESSES: Submit your comments, identified by docket identification (ID) number and the pesticide petition number (PP) of interest as shown in the body of this document, by one of the following methods: • Federal eRulemaking Portal: https:// www.regulations.gov. Follow the online instructions for submitting comments. Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. • Mail: OPP Docket, Environmental Protection Agency Docket Center (EPA/ DC), (28221T), 1200 Pennsylvania Ave. NW., Washington, DC 20460–0001. • Hand Delivery: To make special arrangements for hand delivery or rmajette on DSK2TPTVN1PROD with PROPOSALS-1 SUMMARY: VerDate Mar<15>2010 13:38 Feb 20, 2014 Jkt 232001 delivery of boxed information, please follow the instructions at https:// www.epa.gov/dockets/contacts.htm. Additional instructions on commenting or visiting the docket, along with more information about dockets generally, is available at https://www.epa.gov/ dockets. FOR FURTHER INFORMATION CONTACT: Robert McNally, Biopesticides and Pollution Prevention Division (BPPD) (7511P), email address: BPPDFRNotices@epa.gov; or Lois Rossi, Registration Division (RD) (7505P), email address: RDFRNotices@epa.gov; main telephone number: (703) 305– 7090; Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460–0001. As part of the mailing address, include the contact person’s name, division, and mail code. SUPPLEMENTARY INFORMATION: A. Does this action apply to me? You may be potentially affected by this action if you are an agricultural producer, food manufacturer, or pesticide manufacturer. The following list of North American Industrial Classification System (NAICS) codes is not intended to be exhaustive, but rather provides a guide to help readers determine whether this document applies to them. Potentially affected entities may include: • Crop production (NAICS code 111). • Animal production (NAICS code 112). • Food manufacturing (NAICS code 311). • Pesticide manufacturing (NAICS code 32532). If you have any questions regarding the applicability of this action to a particular entity, consult the person listed at the end of the pesticide petition summary of interest. B. What should I consider as I prepare my comments for EPA? 1. Submitting CBI. Do not submit this information to EPA through regulations.gov or email. Clearly mark the part or all of the information that you claim to be CBI. For CBI information in a disk or CD–ROM that you mail to EPA, mark the outside of the disk or CD–ROM as CBI and then identify electronically within the disk or CD–ROM the specific information that is claimed as CBI. In addition to one complete version of the comment that includes information claimed as CBI, a copy of the comment that does not contain the information claimed as CBI must be submitted for inclusion in the PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 public docket. Information so marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2. 2. Tips for preparing your comments. When submitting comments, remember to: i. Identify the document by docket ID number and other identifying information (subject heading, Federal Register date and page number). ii. Follow directions. The Agency may ask you to respond to specific questions or organize comments by referencing a Code of Federal Regulations (CFR) part or section number. iii. Explain why you agree or disagree; suggest alternatives and substitute language for your requested changes. iv. Describe any assumptions and provide any technical information and/ or data that you used. v. If you estimate potential costs or burdens, explain how you arrived at your estimate in sufficient detail to allow for it to be reproduced. vi. Provide specific examples to illustrate your concerns and suggest alternatives. vii. Explain your views as clearly as possible, avoiding the use of profanity or personal threats. viii. Make sure to submit your comments by the comment period deadline identified. 3. Environmental justice. EPA seeks to achieve environmental justice, the fair treatment and meaningful involvement of any group, including minority and/or low-income populations, in the development, implementation, and enforcement of environmental laws, regulations, and policies. To help address potential environmental justice issues, the Agency seeks information on any groups or segments of the population who, as a result of their location, cultural practices, or other factors, may have atypical or disproportionately high and adverse human health impacts or environmental effects from exposure to the pesticides discussed in this document, compared to the general population. II. What action is the Agency taking? EPA is announcing its receipt of several pesticide petitions filed under section 408 of the Federal Food, Drug, and Cosmetic Act (FFDCA), (21 U.S.C. 346a), requesting the establishment or modification of regulations in 40 CFR part 180 for residues of pesticide chemicals in or on various food commodities. The Agency is taking public comment on the requests before responding to the petitioners. EPA is not proposing any particular action at this time. EPA has determined that the E:\FR\FM\21FEP1.SGM 21FEP1

Agencies

[Federal Register Volume 79, Number 35 (Friday, February 21, 2014)]
[Proposed Rules]
[Pages 9868-9870]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-03673]


========================================================================
Proposed Rules
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains notices to the public of 
the proposed issuance of rules and regulations. The purpose of these 
notices is to give interested persons an opportunity to participate in 
the rule making prior to the adoption of the final rules.

========================================================================


Federal Register / Vol. 79, No. 35 / Friday, February 21, 2014 / 
Proposed Rules

[[Page 9868]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-23809; Directorate Identifier 2005-NE-52-AD]
RIN 2120-AA64


Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to supersede airworthiness directive (AD) 2007-10-
07, which applies to all Turbomeca S.A. Arriel 2B, 2B1, and 2B1A 
turboshaft engines. AD 2007-10-07 currently requires an inspection of 
the splines of the coupling assembly and the hydro-mechanical metering 
unit (HMU) drive gear shaft for wear. This proposed AD would require 
the same inspection and expand the affected population. This proposed 
AD would also remove Arriel 2B1A engines from the applicability. We are 
proposing this AD to prevent failure of the HMU drive gear shaft, which 
could lead to damage to the engine and damage to the airplane.

DATES: We must receive comments on this proposed AD by April 22, 2014.

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 https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     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 Turbomeca, 
S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; telex: 570 042; 
fax: 33 (0)5 59 74 45 15. 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 https://www.regulations.gov by searching for and locating Docket No. FAA-2006-
23809; 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 proposed AD, the mandatory continuing 
airworthiness information, the regulatory evaluation, any comments 
received, and other information. The street 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: Anthony W. Cerra Jr., Aerospace 
Engineer, Engine Certification Office, FAA, Engine & Propeller 
Directorate, 12 New England Executive Park, Burlington, MA 01803; 
phone: 781-238-7128; fax: 781-238-7199; email: anthony.cerra@faa.gov.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2006-
23809; Directorate Identifier 2005-NE-52-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    On May 4, 2007, we issued AD 2007-10-07, Amendment 39-15048 (72 FR 
26711, May 11, 2007). AD 2007-10-07 applies to all Turbomeca Arriel 
S.A. 2B, 2B1, and 2B1A turboshaft engines. AD 2007-10-07 requires an 
initial inspection of the splines of the coupling assembly and the HMU 
drive gear shaft for wear as well as an additional inspection every 
time the HMU is removed. AD 2007-10-07 resulted from reports of in-
flight shutdown resulting from deterioration of the splines of the 
coupling assembly and the HMU drive gear shaft. We issued AD 2007-10-07 
to prevent failure of the HMU drive gear shaft, which could lead to 
damage to the engine, and damage to the airplane.

Actions Since Existing AD Was Issued

    Since we issued AD 2007-10-07, Amendment 39-15048 (72 FR 26711, May 
11, 2007), we received a report of HMU drive gear shaft spline wear on 
Turbomeca S.A. Arriel 2 engines. Also, since we issued AD 2007-10-07, 
the European Aviation Safety Agency issued AD 2013-0170, dated July 30, 
2013. AD 2013-0170 requires inspection of the coupling assembly splines 
and the HMU drive gear shaft for wear. AD 2013-0170 also adds the 
Arriel 2C, 2C1, 2C2, 2S1, and 2S2 engines to the list of affected 
engines.

FAA's Determination

    We are proposing 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.

Proposed AD Requirements

    This proposed AD would retain the requirements of AD 2007-10-07, 
Amendment 39-15048 (72 FR 26711, May 11, 2007) except it would 
eliminate the additional inspection when the HMU is compliant after the 
500 hour inspection and the HMU assembly is unchanged. This proposed AD 
would expand the applicability to include Turbomeca S.A. Arriel 2C, 
2C1, 2C2, 2S1, and 2S2 engines, while removing Arriel 2B1A engines.

Costs of Compliance

    We estimate that this proposed AD would affect 470 engines 
installed on aircraft of U.S. registry. We also estimate

[[Page 9869]]

that it would take about 2 hours per engine to comply with this 
proposed AD. The average labor rate is $85 per hour. No parts are 
required. Based on these figures, we estimate the cost of this proposed 
AD on U.S. operators to be $79,900.

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

    We have determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 the proposed 
regulation:
    (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 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 
2007-10-07, Amendment 39-15048 (72 FR 26711, May 11, 2007), and adding 
the following new AD:

Turbomeca S.A: Docket No. FAA-2006-23809; Directorate Identifier 
2005-NE-52-AD.

(a) Comments Due Date

    The FAA must receive comments on this AD action by April 22, 
2014.

(b) Affected ADs

    This AD supersedes AD 2007-10-07, Amendment 39-15048 (72 FR 
26711, May 11, 2007).

(c) Applicability

    This AD applies to all Turbomeca S.A. Arriel 2B, 2B1, 2C, 2C1, 
2C2, 2S1, and 2S2 turboshaft engines.

(d) Unsafe Condition

    This AD was prompted by a report of an additional case of wear 
of the hydro-mechanical metering unit (HMU) drive gear shaft splines 
on both Turbomeca S.A. Arriel 2 engines on a twin-engine helicopter. 
We are issuing this AD to prevent failure of the HMU drive gear 
shaft, which could lead to damage to the engine and damage to the 
aircraft.

(e) Compliance

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

(1) Arriel 2B and 2B1 Engines

    (i) If on the effective date of this AD the HMU has 500 or more 
operating hours since new or since last overhaul, then within 25 HMU 
operating hours from the effective date of this AD, inspect the 
high-pressure (HP) pump drive gear shaft splines and coupling shaft 
assembly splines. Use paragraph 2.B.(1)(b) of Turbomeca S.A. 
Mandatory Service Bulletin (MSB) No. 292 73 2812, Version G, dated 
June 24, 2013, to do your inspection.
    (ii) If on the effective date of this AD the HMU has less than 
500 operating hours since new or since last overhaul, then inspect 
the HP pump drive gear shaft splines and coupling shaft assembly 
splines between 500 and 525 operating hours since new or since last 
overhaul. Use paragraph 2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 
2812, Version G, dated June 24, 2013, to do your inspection.

(2) Arriel 2C, 2C1, 2C2, 2S1, and 2S2 Engines

    (i) If on the effective date of this AD the HMU has 500 or more 
operating hours since new, since last overhaul, or if HMU operating 
hours are unknown, then within 200 HMU operating hours from the 
effective date of this AD, inspect the HP pump drive gear shaft 
splines and coupling shaft assembly splines. Use paragraph 
2.B.(1)(b) of Turbomeca S.A. MSB No. 292 73 2822, Version F, dated 
June 21, 2013, to do your inspection.
    (ii) If on the effective date of this AD the HMU has more than 
300 but less than 500 operating hours since new or since last 
overhaul, then within 225 HMU operating hours, but no earlier than 
500 or later than 700 HMU operating hours from the effective date of 
this AD, inspect the HP pump drive gear shaft splines and coupling 
shaft assembly splines. Use paragraph 2.B.(1)(b) of Turbomeca S.A. 
MSB No. 292 73 2822 Version F, dated June 21, 2013, to do your 
inspection.
    (iii) If on the effective date of this AD the HMU has 300 
operating hours or less since new or since last overhaul, then 
inspect the HP pump drive gear shaft splines and coupling shaft 
assembly splines between 500 and 525 HMU operating hours since new 
or since last overhaul. Use paragraph 2.B.(1)(b) of Turbomeca S.A. 
MSB No. 292 73 2822, Version F, dated June 21, 2013, to do your 
inspection.

(f) Credit for Previous Actions

    If, before the effective date of this AD, you inspected your HMU 
after 500 HMU operating hours since new or since last overhaul using 
an earlier version of Turbomeca S.A. MSB No. 292 73 2822, Version F, 
dated June 21, 2013, for 2C, 2C1, 2C2, 2S1 and 2S2 engines, or MSB 
No. 292 73 2812, Version G, dated June 24, 2013, for 2B or 2B1 
engines, you have met the requirements of this AD.

(g) Installation Prohibition

    After the effective date of this AD, do not install any HMU onto 
any engine, nor install any engine onto any helicopter with an HMU 
affected by this AD, unless the HMU passed the inspection required 
by paragraph (e)(1) of this AD for Arriel 2B and 2B1 engines or 
paragraph (e)(2) of this AD for Arriel 2C, 2C1, 2C2, 2S1, and 2S2 
engines.

(h) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
to this AD. Use the procedures found in 14 CFR 39.19 to make your 
request.

(i) Related Information

    (1) For more information about this AD, contact Anthony W. 
Cerra, Jr., Aerospace Engineer, Engine Certification Office, FAA, 
Engine & Propeller Directorate, 12 New England Executive Park, 
Burlington, MA 01803; phone: 781-238-7128; fax: 781-238-7199; email: 
anthony.cerra@faa.gov.
    (2) Refer to MCAI European Aviation Safety Agency AD 2013-0170, 
dated July 30, 2013, for related information. You may examine the 
MCAI in the AD docket on the Internet at https://www.regulations.gov/#!docketDetail;D=FAA-2006-23809.

[[Page 9870]]

    (3) Turbomeca S.A. MSB No. 292 73 2822, Version F, dated June 
21, 2013, and Turbomeca S.A. MSB No. 292 73 2812, Version G, dated 
June 24, 2013, pertain to the subject of this AD and can be obtained 
from Turbomeca S.A. using the contact information in paragraph 
(i)(4) of this AD.
    (4) For service information identified in this AD, contact 
Turbomeca, S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; 
telex: 570 042; fax: 33 (0)5 59 74 45 1.
    (5) 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 February 11, 2014.
Robert J. Ganley,
Acting Assistant Directorate Manager, Engine & Propeller Directorate, 
Aircraft Certification Service.
[FR Doc. 2014-03673 Filed 2-20-14; 8:45 am]
BILLING CODE 4910-13-P
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