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2017-08-08 CFE COMPANY: Amendment 39-18857; Docket No. FAA-2016-9380; Directorate Identifier 2016-NE-21-AD.
(a) EFFECTIVE DATE

    This AD is effective May 31, 2017.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This  AD  applies  to CFE  Company  (CFE)  CFE738-1-1B model  turbofan
    engines with  a high-pressure  compressor (HPC)  impeller, part number
    (P/N) 6079T77P07 or P/N 6079T77P09, with a serial number listed in CFE
    Service Bulletin  (SB) CFE738-72-8080,  Revision 0,  dated  August 18,
    2016, installed.

(d) SUBJECT

    Joint Aircraft System Component (JASC) 7230, Turbine Engine Compressor
    Section.

(e) UNSAFE CONDITION

    This AD was prompted by a  quality escape for HPC impellers made  from
    forgings with nonconforming material  grain size. We are  issuing this
    AD to prevent uncontained failure  of the HPC impeller, damage  to the
    engine, and damage to the airplane.

(f) COMPLIANCE

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

(g) REQUIRED ACTION

    Remove all affected HPC impellers from service  at the next piece-part
    exposure and replace with a part eligible for installation.

(h) DEFINITION

    For  the  purposes  of this  AD,  "piece-part exposure" is  defined as
    separation of the impeller from the compressor rotor assembly.

(i) ALTERNATIVE METHODS OF COMPLIANCE (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.

(j) RELATED INFORMATION

    For more information about this AD,  contact  Martin Adler,  Aerospace
    Engineer,  Engine  Certification  Office,  FAA,  1200 District Avenue,
    Burlington, MA 01803;  phone: 781-238-7157;  fax: 781-238-7199; email:
    martin.adler@faa.gov.

(k) MATERIAL INCORPORATED BY REFERENCE

(1) The  Director  of  the  Federal Register approved the incorporation by
    reference (IBR) of  the service information  listed in this  paragraph
    under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use  this service information as applicable to do the actions
    required by this AD, unless the AD specifies otherwise.

(i) CFE Service Bulletin CFE738-72-8080 Revision 0, dated August 18, 2016.

(ii) Reserved.

(3) For CFE service information identified in this AD, contact CFE Company
    111 S. 34th Street, Phoenix, Arizona 85034-2802;  phone: 800-601-3099;
    Internet: https://www.myaerospace.com.

(4) You  may  view  this  service information  at FAA,  Engine & Propeller
    Directorate, 1200 District Avenue, Burlington, MA.  For information on
    the availability of this material at the FAA, call 781-238-7125.

(5) You may view this service information  at  the  National Archives  and
    Records Administration (NARA).  For information on the availability of
    this material at NARA, call 202-741-6030 or go to: http://www.archives
    .gov/federal-register/cfr/ibr-locations.html.

Issued in Burlington, Massachusetts, on April 11, 2017.  Robert J. Ganley,
Acting  Manager, Engine  & Propeller  Directorate, Aircraft  Certification
Service.

FOR FURTHER INFORMATION CONTACT: Martin Adler,  Aerospace Engineer, Engine
Certification  Office,  FAA,  1200 District Avenue,  Burlington, MA 01803;
phone: 781-238-7157; fax: 781-238-7199; email: martin.adler@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-9380; Directorate Identifier 2016-NE-21-AD;
Amendment 39-18857; AD 2017-08-08]
RIN 2120-AA64

Airworthiness Directives; CFE Company Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
CFE Company (CFE) turbofan engines. This AD was prompted by a quality
escape for high-pressure compressor (HPC) impellers made from forgings
with nonconforming material grain size. This AD requires removal of the
HPC impeller. We are issuing this AD to correct the unsafe condition on
these products.

DATES: This AD is effective May 31, 2017.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 31,
2017.

ADDRESSES: For service information identified in this final rule,
contact CFE Company, 111 S. 34th Street, Phoenix, Arizona 85034-2802;
phone: 800-601-3099; Internet: https://www.myaerospace.com. You may
view this service information at the FAA, Engine & Propeller
Directorate, 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-2016-
9380; 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 AD, 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 of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Martin Adler, Aerospace Engineer,
Engine Certification Office, FAA, 1200 District Avenue, Burlington, MA
01803; phone: 781-238-7157; fax: 781-238-7199; email:
martin.adler@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain CFE CFE738-1-1B
model turbofan engines with HPC impeller, part number (P/N) 6079T77P07
or P/N 6079T77P09, installed. The NPRM published in the Federal
Register on January 3, 2017 (82 FR 52). The NPRM was prompted by a
quality escape for HPC impellers made from forgings with nonconforming
material grain size. The NPRM proposed to require removal of the HPC
impeller. We are issuing this AD to correct the unsafe condition on
these products.

Comments

We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM (82 FR 52, January 3,
2017) or on the determination of the cost to the public.

Conclusion

We reviewed the relevant data and determined that air safety and
the public interest require adopting this AD as proposed.

Related Service Information Under 1 CFR Part 51

We reviewed CFE Service Bulletin (SB) CFE738-72-8080, Revision 0,
dated August 18, 2016. The SB describes procedures for replacing
specific serial numbered HPC impellers, P/N 6079T77P07 or P/N
6079T77P09. 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.

Costs of Compliance

We estimate that this AD affects 176 engines installed on airplanes
of U.S. registry.
We estimate the following costs to comply with this AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Pro-rated HPC impeller
$0.00
$42,240
$42,240
$7,434,240

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

This AD will not have federalism implications under 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 that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, 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

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 adding the following new airworthiness
directive (AD):