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PROPOSED AD SAFRAN HELICOPTER ENGINES, S.A. (TYPE CERTIFICATE PREVIOUSLY HELD BY TURBOMECA S.A):
Docket No. FAA-2013-0024; Product Identifier 2000-NE-12-AD.

(a) COMMENTS DUE DATE

    We must receive comments by October 10, 2017.

(b) AFFECTED ADS

    This AD supersedes AD 2013-11-09, Amendment 39-17469 (78 FR 32551, May
    31, 2013).

(c) APPLICABILITY

    This AD  applies  to  all  Turbomeca S.A. Arrius 2B1 and 2F turboshaft
    engines.

(d) SUBJECT

    Joint Aircraft System Component  (JASC)  Code 7320,  Fuel  Controlling
    System.

(e) UNSAFE CONDITION

    This  AD was  prompted by  several reports  of engine  flameouts as  a
    result of  reduced fuel  flow due  to the  presence of  coking. We are
    issuing this AD  to prevent an  engine flameout of  Arrius 2B1 and  2F
    turboshaft engines and damage to the helicopter.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) REQUIRED ACTIONS

(1) For Arrius 2B1 turboshaft engines, do the following:

(i) Replace each main fuel injector half-manifold  and  preferred injector
    with  a  part eligible for installation before exceeding the operating
    hours  (hours accumulated by the part since installation on an engine)
    specified in Figure 1 to paragraph (g) of this AD.

                   FIGURE 1 TO PARAGRAPH (G) - REPLACEMENT                
    ______________________________________________________________________

                          PART                             OPERATING HOURS
    ______________________________________________________________________
    Main fuel injector half-manifold - post-mod TU117             600
    Main fuel injector half-manifold - pre-mod TU117              200
    Preferred injector pre/post-mod TU117                         200
    ______________________________________________________________________

(ii) Borescope-inspect (BSI) the flame tube and  the high-pressure turbine
     (HPT) area for turbine distress,  when  replacing  the  fuel injector
     manifolds and preferred injector for the first time.

(iii) Thereafter, replace the fuel injector manifolds and preferred injec-
      tor  with  a part  eligible  for installation  before  exceeding the
      operating hours (hours accumulated by the part since installation on
      an engine) specified in Figure 1 to paragraph (g) of this AD.

(2) For Arrius 2F turboshaft engines, do the following:

(i) Replace each pipe injector preferred assembly, part number (P/N) 0 319
    73 835 0 and P/N 0 319 73 044 0, with a part eligible for installation
    before  exceeding  400 operating hours  (hours accumulated by the part
    since installation on an engine).

(ii) BSI the flame tube  and  the HPT area for turbine distress,  when re-
     placing the privilege injector for the first time.

(iii) Unless  already  accomplished  as required by paragraph (g)(2)(i) of
      this AD,  within 16 months after the effective date of this AD,  re-
      place the pipe injector preferred assembly, P/N 0 319 73 835 0, with
      a part eligible for installation before the next flight.

(iv) Thereafter,  replace the pipe injector preferred assembly with a part
     eligible  for installation  within 400 operating hours since the last
     pipe injector preferred assembly replacement.

(h) DEFINITIONS

(1) For Arrius 2B1 turboshaft engines,  a main fuel injector half-manifold
    or  preferred injector is eligible for installation  if it has not ex-
    ceeded the operating hours specified  in  Figure 1 to paragraph (g) of
    this AD since first installation on an engine or since last cleaning.

(2) For Arrius 2F turboshaft engines,  a pipe injector preferred assembly,
    P/N 0 319 73 044 0 is eligible for installation if it has not exceeded
    400 operating hours since first installation  on  an  engine  or since
    last cleaning.

(i) INSTALLATION PROHIBITION

(1) For  Arrius 2B1 turboshaft engines,  after  the effective date of this
    AD, do  not install  a main  fuel injector  half-manifold or preferred
    injector onto any engine, or any engine onto a helicopter, unless  the
    main fuel injector half-manifold  and preferred injector are  eligible
    for installation.

(2) For Arrius 2F turboshaft engines, after the effective date of this AD,
    do not install a pipe injector preferred assembly onto any engine,  or
    any  engine  onto  a helicopter,  unless  the  pipe injector preferred
    assembly is eligible for installation.

(3) For Arrius 2F turboshaft engines, after the effective date of this AD,
    do not install a pipe injector preferred assembly, P/N 0 319 73 835 0,
    onto any engine.

(j) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The Manager,  FAA,  ECO Branch, Compliance and Airworthiness Division,
    has the authority to approve AMOCs for this AD, if requested using the
    procedures found  in 14  CFR 39.19.  In accordance  with 14 CFR 39.19,
    send  your  request  to  your  principal  inspector  or  local  Flight
    Standards  District  Office, as  appropriate.  If sending  information
    directly to the manager of the ECO Branch, send it to the attention of
    the person identified  in paragraph (k)(1)  of this AD.  You may email
    your request to: ANE-AD-AMOC@faa.gov.

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector,  or  lacking a principal inspector,  the manager of the local
    flight standards district office/certificate holding district office.

(k) RELATED INFORMATION

(1) For more information about this AD,  contact  Robert Green,  Aerospace
    Engineer, FAA, ECO Branch, Compliance and Airworthiness Division, 1200
    District Avenue, Burlington, MA 01803;  phone: 781-238-7754; fax: 781-
    238-7199; email: robert.green@faa.gov.

(2) Refer  to  MCAI  European Aviation Safety Agency (EASA)  AD 2017-0070,
    dated April 25, 2017,  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-2013-0024.

(3) Safran Helicopter Engines S.A., SB No. 319 73 4839,  Version A,  dated
    December 13, 2016, can be obtained from Safran Helicopter Engines S.A.
    using the contact information in paragraph (k)(4) of this AD.

(4) For service information identified in this AD, contact Safran Helicop-
    ter Engines, S.A.,  40220 Tarnos, France;  phone: (33) 05 59 74 40 00;
    fax: (33) 05 59 74 45 15.

(5) You may view this service information at the FAA, Engine and Propeller
    Standards  Branch,  Policy  and  Innovation  Division,  1200  District
    Avenue, Burlington, MA.  For information on  the availability of  this
    material at the FAA, call 781-238-7125.

Issued in Burlington, Massachusetts, on August 18, 2017. Robert J. Ganley,
Manager,  Engine and  Propeller Standards  Branch, Aircraft  Certification
Service.

DATES: We must receive comments on this proposed AD by October 10, 2017.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0024; Product Identifier 2000-NE-12-AD]
RIN 2120-AA64

Airworthiness Directives; Safran Helicopter Engines, S.A.,
Turboshaft Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to supersede airworthiness directive (AD) 2013-11-
09 that applies to all Safran Helicopter Engines, S.A., Arrius 2B1 and
2F turboshaft engines. Depending on the engine model, AD 2013-11-09
requires the repetitive replacement of the fuel injector manifolds and
privilege injector, or only the privilege injector. Since we issued AD
2013-11-09, we received reports of engine flameouts as a result of
reduced fuel flow due to the presence of coking. This proposed AD would
retain the repetitive hardware replacement requirements of AD 2013-11-
09, but only allow replacement pipe injector preferred assembly, part
number (P/N) 0 319 73 044 0, on the Arrius 2F engines. We are proposing
this AD to correct the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by October 10, 2017.

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 http://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 NPRM, contact Safran
Helicopter Engines, S.A., 40220 Tarnos, France; phone: (33) 05 59 74 40
00; fax: (33) 05 59 74 45 15. You may view this service information at
the FAA, Engine and Propeller Standards Branch, Policy and Innovation
Division, 1200 District Avenue, 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. FAA-2013-0024;
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, 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: Robert Green, Aerospace Engineer, FAA,
ECO Branch, Compliance and Airworthiness Division, 1200 District
Avenue, Burlington, MA 01803; phone: 781-238-7754; fax: 781-238-7199;
email: robert.green@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-2013-0024; Product Identifier 2000-NE-12-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 http://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 23, 2013, we issued AD 2013-11-09, Amendment 39-17469 (78 FR
32551, May 31, 2013), "AD 2013-11-09" for all Turbomeca S.A. Arrius
2B, 2B1, and 2F turboshaft engines. Depending on the engine model, AD
2013-11-09 requires the repetitive replacement of the fuel injector
manifolds and privilege injector, or only the privilege injector. AD
2013-11-09 resulted from a report that the corrective actions of AD
2001-08-14, R1, Amendment 39-14423 (71 FR 2993, January 19, 2006) were
insufficient to eliminate the unsafe condition. We issued AD 2013-11-09
to prevent an engine flameout of Arrius 2B1 and 2F turboshaft engines
and damage to the helicopter.

Actions Since AD 2013-11-09 Was Issued


Since we issued AD 2013-11-09, we received reports of engine
flameouts as a result of reduced fuel flow due to the presence of
coking. Also since we issued AD 2013-11-09, the European Aviation
Safety Agency (EASA) has issued AD 2017-0070, dated April 25, 2017,
which requires replacement of pipe injector preferred assemblies, P/N 0
319 73 835 0, with improved assembly, P/N 0 319 73 044 0, on Arrius 2F
engines.

Related Service Information

We reviewed Safran Helicopter Engines, S.A., Service Bulletin (SB)
No. 319 73 4839, Version A, dated December 13, 2016. The SB describes
procedures for replacing pipe injector preferred assemblies.

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 require, for Arrius 2B1 turboshaft engines,
initial and repetitive replacement of the main fuel injector half-
manifolds and preferred injector with a part eligible for installation
within the compliance times specified. This proposed AD would also
require, for Arrius 2F turboshaft engines, initial and repetitive
replacement of the preferred injector and replacing pipe injector
preferred assemblies, P/N 0 319 73 835 0, with assembly, P/N 0 319 73
044 0.

Costs of Compliance

We estimate that this proposed AD affects 50 Arrius 2B1 and 105
Arrius 2F turboshaft engines installed on helicopters of U.S. registry.

We estimate the following costs to comply with this proposed AD:

Estimated Costs

Action Labor cost Parts cost Cost per product Cost on U.S. operators
Arrius 2B1 fuel injector manifolds and injector replacement 3 work-hours x $85 per hour = $255 $0 $255 $12,750
Arrius 2F pipe injector preferred assembly replacement 3 work-hours x $85 per hour = $255 3,154 3,409 357,945

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.

This AD is issued in accordance with authority delegated by the
Executive Director, Aircraft Certification Service, as authorized by
FAA Order 8000.51C. In accordance with that order, issuance of ADs is
normally a function of the Compliance and Airworthiness Division, but
during this transition period, the Executive Director has delegated the
authority to issue ADs applicable to engines, propellers, and
associated appliances to the Manager, Engine and Propeller Standards
Branch, Policy and Innovation Division.

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.

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

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]

2. The FAA amends Sec. 39.13 by removing airworthiness directive (AD)
2013-11-09, Amendment 39-17469 (78 FR 32551, May 31, 2013), and adding
the following new AD: