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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 |
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DEPARTMENT OF TRANSPORTATION
Authority for This Rulemaking |