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PROPOSED AD GE HONDA AERO ENGINES: Docket No. FAA-2019-0352; Product Identifier 2019-NE-09-AD.
(a) COMMENTS DUE DATE

    The FAA must receive comments by July 5, 2019.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies to  all GE  Honda Aero  Engines (GHAE) HF120 turbofan
    engines  with  fuel pump metering unit (FPMU)  assembly,  part  number
    (P/N) 24100-Q0A-F000, installed.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 7314, Engine Fuel Pump.

(e) UNSAFE CONDITION

    This AD was prompted  by damage found on the permanent magnetic alter-
    nator (PMA) drive  gear within the  FPMU assembly.  The FAA is issuing
    this AD to prevent failure of the FPMU assembly. The unsafe condition,
    if not addressed, could result in failure of one or more engines, loss
    of thrust control, and loss of the airplane.

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

    Within 20 engine hours after the effective date of this AD,  or before
    accumulating 600 engine hours time since new,  whichever occurs later,
    remove the affected FPMU assembly and replace it with a part  eligible
    for installation.

(h) INSTALLATION PROHIBITION

    After the effective date of this AD, do not install  on  any  engine a
    FPMU assembly, P/N 24100-Q0A-F000.

(i) DEFINITION

    For the purposes of this AD, a "part eligible for installation" is:

(1) A FPMU assembly, P/N 24100-Q0A-G000 or P/N 24100-Q0A-F100; or

(2) a FPMU assembly, P/N 24100-Q0A-F000, that is rebuilt and marked as P/N
    24100-Q0A-G000 or P/N 24100-Q0A-F100.

(j) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The Manager, ECO Branch,  FAA,  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  certification
    office, 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  Michael Richardson-Bach,
    Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington,
    MA 01803;  phone:  781-238-7747;  fax:  781-238-7199;  email: michael.
    richardson-bach@faa.gov.

(2) For service information identified in this AD,  contact  GE Honda Aero
    Engines, LLC,  9050 Centre Pointe Drive,  Suite 200,  West Chester, OH
    45069;  phone 513-552-7820; email: info@honda-aero.com; internet: www.
    gehonda.com.  You may view  this referenced service information at the
    FAA,  Engine  and  Propeller  Standards  Branch, 1200 District Avenue,
    Burlington, MA 01803.  For  information  on  the  availability of this
    material at the FAA, call 781-238-7759.

Issued in Burlington, Massachusetts,  on  May 15, 2019.  Robert J. Ganley,
Manager, Engine & Propeller Standards Branch, Aircraft Certification Serv-
ice.

DATES: The FAA must receive comments on this proposed AD by July 5, 2019.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0352; Product Identifier 2019-NE-09-AD]
RIN 2120-AA64

Airworthiness Directives; GE Honda Aero Engines Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all GE Honda Aero Engines (GHAE) HF120 turbofan engines with a
certain fuel pump metering unit (FPMU) assembly. This proposed AD was
prompted by damage found on the permanent magnetic alternator (PMA)
drive gear within the FPMU assembly. This proposed AD would require
removal of a certain FPMU assembly and its replacement with a part
eligible for installation. The FAA is proposing this AD to address the
unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by July 5, 2019.

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 GE Honda
Aero Engines, LLC, 9050 Centre Pointe Drive, Suite 200, West Chester,
OH 45069; phone 513-552-7820; email: info@honda-aero.com; internet:
www.gehonda.com. You may view this service information at the FAA,
Engine and Propeller Standards Branch, 1200 District Avenue,
Burlington, MA 01803. For information on the availability of this
material at the FAA, call 781-238-7759.

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-2019-0352;
or in person at Docket Operations between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays. The AD docket contains
this NPRM, the regulatory evaluation, any comments received, and other
information. The street address for Docket Operations (phone: 800-647-
5527) is listed above. Comments will be available in the AD docket
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Michael Richardson-Bach, Aerospace
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803;
phone: 781-238-7747; fax: 781-238-7199; email: michael.richardson-bach@
faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include "Docket No. FAA-2019-0352;
Product Identifier 2019-NE-09-AD" at the beginning of your comments.
The FAA specifically invites comments on the overall regulatory,
economic, environmental, and energy aspects of this NPRM. The FAA will
consider all comments received by the closing date and may amend this
NPRM because of those comments.

The FAA will post all comments received, without change, to http://www.
regulations.gov, including any personal information you provide.
The FAA will also post a report summarizing each substantive verbal
contact received about this NPRM.

Discussion

The FAA was notified of an incident on a flight test engine that
resulted in the loss of over speed protection warning. GHAE's
subsequent investigation found damage on the PMA drive gear teeth
within the FPMU assembly, which was likely due to dynamic loads on the
drive gear that exceeded the material capability. This condition, if
not addressed, could result in failure of one or more engines, loss of
thrust control, and loss of the airplane.

Related Service Information

The FAA reviewed GHAE HF120 Service Bulletin (SB) 73-0016 R01,
dated November 8, 2018. The SB describes procedures for replacement of
the FPMU assembly.

FAA's Determination

The FAA is proposing this AD because it 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 removal of a certain FPMU assembly
and its replacement with a part eligible for installation.

Costs of Compliance

The FAA estimates that this proposed AD affects 161 engines
installed on airplanes of U.S. registry.

The FAA estimates the following costs to comply with this proposed AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Replace the FPMU 6.5 work-hours x $85 per hour = $552.50
$50,000
$50,552.50
$8,138,952.50

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.

The FAA is 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

The FAA 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 this proposed
regulation:

(1) Is not a "significant regulatory action" under Executive
Order 12866,

(2) Will not affect intrastate aviation in Alaska, and

(3) 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 adding the following new airworthiness
directive (AD):