82_FR_7747 82 FR 7734 - Airworthiness Directives; General Electric Company Turbofan Engines

82 FR 7734 - Airworthiness Directives; General Electric Company Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 82, Issue 13 (January 23, 2017)

Page Range7734-7735
FR Document2017-01227

We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CF6-80C2L1F turbofan engines. This proposed AD was prompted by a reduction in the life limit of the affected engines which is the result of a revised operating profile. This proposed AD would require replacement of the high-pressure turbine (HPT) spacer/impeller, part number (P/N) 1539M12P02, at a newer, lower life limit. We are proposing this AD to correct the unsafe condition on these products.

Federal Register, Volume 82 Issue 13 (Monday, January 23, 2017)
[Federal Register Volume 82, Number 13 (Monday, January 23, 2017)]
[Proposed Rules]
[Pages 7734-7735]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2017-01227]



[[Page 7734]]

=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-9490; Directorate Identifier 2016-NE-26-AD]
RIN 2120-AA64


Airworthiness Directives; General Electric Company Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain General Electric Company (GE) CF6-80C2L1F turbofan engines. 
This proposed AD was prompted by a reduction in the life limit of the 
affected engines which is the result of a revised operating profile. 
This proposed AD would require replacement of the high-pressure turbine 
(HPT) spacer/impeller, part number (P/N) 1539M12P02, at a newer, lower 
life limit. We are proposing this AD to correct the unsafe condition on 
these products.

DATES: We must receive comments on this proposed AD by March 9, 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.

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-
9490; 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 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: Herman Mak, Aerospace Engineer, Engine 
Certification Office, FAA, Engine & Propeller Directorate, 1200 
District Avenue, Burlington, MA 01803; phone: 781-238-7147; fax: 781-
238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite 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-2016-9490; 
Directorate Identifier 2016-NE-26-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

    The United States Air Force revised its operating profile for its 
GE CF6-80C2L1F engines. As a result of this change in operating 
profile, GE reduced its life limit for the HPT spacer/impeller from 
20,000 to 18,000 cycles. Therefore, we are proposing to require removal 
of this affected HPT spacer/impeller at the new, lower life limit. This 
condition, if not corrected, could result in failure of the HPT spacer/
impeller, uncontained release of the HPT spacer/impeller, damage to the 
engine, and damage to the airplane.

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 replacement of the HPT spacer/
impeller, P/N 1539M12P02, at a newer, lower life limit.

Costs of Compliance

    We estimate that this proposed AD affects 0 engines installed on 
airplanes of U.S. registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
              Action                     Labor cost            Parts cost           product         operators
----------------------------------------------------------------------------------------------------------------
Replacement of HPT spacer/impeller  0 work-hours x $85    $19,320 (pro-rated           $19,320               $0
 at reduced life.                    per hour = $0.        cost of part).
----------------------------------------------------------------------------------------------------------------

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 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.

[[Page 7735]]

    For the reasons discussed above, I certify this 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

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 adding the following new airworthiness 
directive (AD):

General Electric Company: Docket No. FAA-2016-9490; Directorate 
Identifier 2016-NE-26-AD.

(a) Comments Due Date

    We must receive comments by March 9, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to General Electric Company (GE) CF6-80C2L1F 
turbofan engines with a high-pressure turbine (HPT) spacer/impeller, 
part number (P/N) 1539M12P02, installed.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine/
Turboprop Engine--Turbine Section.

(e) Unsafe Condition

    This AD was prompted by a reduction in the life limit of the 
affected engines, which is the result of a revised operating 
profile. We are issuing this AD to prevent failure of the HPT 
spacer/impeller, uncontained release of the HPT spacer/impeller, 
damage to the engine, and damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    After the effective date of this AD, replace the HPT spacer/
impeller, P/N 1539M12P02, before it exceeds 18,000 flight cycles 
since new.

(g) Installation Prohibition

    After the effective date of this AD, do not install an HPT 
spacer/impeller, P/N 1539M12P02, onto any engine, or return to 
service any engine with an HPT spacer/impeller, P/N 1539M12P02, 
installed, if the HPT spacer/impeller exceeds 18,000 flight cycles 
since new.

(h) 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: [email protected].

(i) Related Information

    For more information about this AD, contact Herman Mak, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7147; fax: 781-238-7199; email: [email protected].

    Issued in Burlington, Massachusetts, on January 12, 2017.
Colleen M. D'Alessandro,
Manager, Engine & Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 2017-01227 Filed 1-19-17; 8:45 am]
 BILLING CODE 4910-13-P



                                                    7734                      Federal Register / Vol. 82, No. 13 / Monday, January 23, 2017 / Proposed Rules

                                                    DEPARTMENT OF TRANSPORTATION                              • Hand Delivery: Deliver to Mail                       proposed AD because of those
                                                                                                            address above between 9 a.m. and 5                       comments.
                                                    Federal Aviation Administration                         p.m., Monday through Friday, except                        We will post all comments we
                                                                                                            Federal holidays.                                        receive, without change, to http://
                                                    14 CFR Part 39                                                                                                   www.regulations.gov, including any
                                                                                                            Examining the AD Docket
                                                    [Docket No. FAA–2016–9490; Directorate                                                                           personal information you provide. We
                                                    Identifier 2016–NE–26–AD]                                  You may examine the AD docket on                      will also post a report summarizing each
                                                                                                            the Internet at http://                                  substantive verbal contact we receive
                                                    RIN 2120–AA64                                           www.regulations.gov by searching for                     about this proposed AD.
                                                    Airworthiness Directives; General                       and locating Docket No. FAA–2016–
                                                                                                                                                                     Discussion
                                                    Electric Company Turbofan Engines                       9490; or in person at the Docket
                                                                                                            Management Facility between 9 a.m.                          The United States Air Force revised
                                                    AGENCY: Federal Aviation                                and 5 p.m., Monday through Friday,                       its operating profile for its GE CF6–
                                                    Administration (FAA), DOT.                              except Federal holidays. The AD docket                   80C2L1F engines. As a result of this
                                                    ACTION: Notice of proposed rulemaking                   contains this proposed AD, the                           change in operating profile, GE reduced
                                                    (NPRM).                                                 regulatory evaluation, any comments                      its life limit for the HPT spacer/impeller
                                                                                                            received, and other information. The                     from 20,000 to 18,000 cycles. Therefore,
                                                    SUMMARY:  We propose to adopt a new                     street address for the Docket Office                     we are proposing to require removal of
                                                    airworthiness directive (AD) for certain                (phone: 800–647–5527) is in the                          this affected HPT spacer/impeller at the
                                                    General Electric Company (GE) CF6–                      ADDRESSES section. Comments will be                      new, lower life limit. This condition, if
                                                    80C2L1F turbofan engines. This                          available in the AD docket shortly after                 not corrected, could result in failure of
                                                    proposed AD was prompted by a                           receipt.                                                 the HPT spacer/impeller, uncontained
                                                    reduction in the life limit of the affected                                                                      release of the HPT spacer/impeller,
                                                    engines which is the result of a revised                FOR FURTHER INFORMATION CONTACT:
                                                                                                            Herman Mak, Aerospace Engineer,                          damage to the engine, and damage to the
                                                    operating profile. This proposed AD                                                                              airplane.
                                                    would require replacement of the high-                  Engine Certification Office, FAA, Engine
                                                    pressure turbine (HPT) spacer/impeller,                 & Propeller Directorate, 1200 District                   FAA’s Determination
                                                    part number (P/N) 1539M12P02, at a                      Avenue, Burlington, MA 01803; phone:
                                                                                                                                                                       We are proposing this AD because we
                                                    newer, lower life limit. We are                         781–238–7147; fax: 781–238–7199;
                                                                                                                                                                     evaluated all the relevant information
                                                    proposing this AD to correct the unsafe                 email: herman.mak@faa.gov.
                                                                                                                                                                     and determined the unsafe condition
                                                    condition on these products.                            SUPPLEMENTARY INFORMATION:                               described previously is likely to exist or
                                                    DATES: We must receive comments on                      Comments Invited                                         develop in other products of the same
                                                    this proposed AD by March 9, 2017.                                                                               type design.
                                                    ADDRESSES: You may send comments,                         We invite you to send any written
                                                                                                            relevant data, views, or arguments about                 Proposed AD Requirements
                                                    using the procedures found in 14 CFR
                                                    11.43 and 11.45, by any of the following                this proposal. Send your comments to                       This proposed AD would require
                                                    methods:                                                an address listed under the ADDRESSES                    replacement of the HPT spacer/impeller,
                                                      • Federal eRulemaking Portal: Go to                   section. Include ‘‘Docket No. FAA–                       P/N 1539M12P02, at a newer, lower life
                                                    http://www.regulations.gov. Follow the                  2016–9490; Directorate Identifier 2016–                  limit.
                                                    instructions for submitting comments.                   NE–26–AD’’ at the beginning of your
                                                                                                                                                                     Costs of Compliance
                                                      • Fax: 202–493–2251.                                  comments. We specifically invite
                                                      • Mail: U.S. Department of                            comments on the overall regulatory,                         We estimate that this proposed AD
                                                    Transportation, Docket Operations, M–                   economic, environmental, and energy                      affects 0 engines installed on airplanes
                                                    30, West Building Ground Floor, Room                    aspects of this proposed AD. We will                     of U.S. registry.
                                                    W12–140, 1200 New Jersey Avenue SE.,                    consider all comments received by the                       We estimate the following costs to
                                                    Washington, DC 20590.                                   closing date and may amend this                          comply with this proposed AD:

                                                                                                                          ESTIMATED COSTS
                                                                                                                                                                                     Cost per      Cost on U.S.
                                                                     Action                                  Labor cost                                 Parts cost                   product        operators

                                                    Replacement of HPT spacer/impel-           0 work-hours × $85 per hour = $0           $19,320 (pro-rated cost of part) .....     $19,320            $0
                                                      ler at reduced life.



                                                    Authority for This Rulemaking                           ‘‘General requirements.’’ Under that                     Regulatory Findings
                                                                                                            section, Congress charges the FAA with
                                                      Title 49 of the United States Code                    promoting safe flight of civil aircraft in                 We determined that this proposed AD
                                                    specifies the FAA’s authority to issue                  air commerce by prescribing regulations                  would not have federalism implications
                                                    rules on aviation safety. Subtitle I,                                                                            under Executive Order 13132. This
                                                                                                            for practices, methods, and procedures
mstockstill on DSK3G9T082PROD with PROPOSALS




                                                    section 106, describes the authority of                                                                          proposed AD would not have a
                                                                                                            the Administrator finds necessary for
                                                    the FAA Administrator. Subtitle VII:                                                                             substantial direct effect on the States, on
                                                    Aviation Programs, describes in more                    safety in air commerce. This regulation
                                                                                                            is within the scope of that authority                    the relationship between the national
                                                    detail the scope of the Agency’s                                                                                 Government and the States, or on the
                                                    authority.                                              because it addresses an unsafe condition
                                                                                                            that is likely to exist or develop on                    distribution of power and
                                                      We are issuing this rulemaking under                  products identified in this rulemaking                   responsibilities among the various
                                                    the authority described in Subtitle VII,                                                                         levels of government.
                                                                                                            action.
                                                    Part A, Subpart III, Section 44701:


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                                                                            Federal Register / Vol. 82, No. 13 / Monday, January 23, 2017 / Proposed Rules                                              7735

                                                      For the reasons discussed above, I                    (f) Compliance                                         ADDRESSES:   Send comments on this
                                                    certify this proposed regulation:                          Comply with this AD within the                      proposal to the U.S. Department of
                                                      (1) Is not a ‘‘significant regulatory                 compliance times specified, unless already             Transportation, Docket Operations, 1200
                                                    action’’ under Executive Order 12866,                   done.                                                  New Jersey Avenue SE., West Building
                                                                                                               After the effective date of this AD, replace        Ground Floor, Room W12–140,
                                                      (2) Is not a ‘‘significant rule’’ under               the HPT spacer/impeller, P/N 1539M12P02,               Washington, DC 20590; telephone: 1–
                                                    the DOT Regulatory Policies and                         before it exceeds 18,000 flight cycles since
                                                                                                                                                                   800–647–5527, or (202) 366–9826. You
                                                    Procedures (44 FR 11034, February 26,                   new.
                                                                                                                                                                   must identify FAA Docket No. FAA–
                                                    1979),                                                  (g) Installation Prohibition                           2016–9355; Airspace Docket No. 16–
                                                      (3) Will not affect intrastate aviation                  After the effective date of this AD, do not         ANM–8, at the beginning of your
                                                    in Alaska to the extent that it justifies               install an HPT spacer/impeller, P/N                    comments. You may also submit
                                                    making a regulatory distinction, and                    1539M12P02, onto any engine, or return to              comments through the Internet at http://
                                                      (4) Will not have a significant                       service any engine with an HPT spacer/                 www.regulations.gov. You may review
                                                    economic impact, positive or negative,                  impeller, P/N 1539M12P02, installed, if the            the public docket containing the
                                                                                                            HPT spacer/impeller exceeds 18,000 flight
                                                    on a substantial number of small entities                                                                      proposal, any comments received, and
                                                                                                            cycles since new.
                                                    under the criteria of the Regulatory                                                                           any final disposition in person in the
                                                    Flexibility Act.                                        (h) Alternative Methods of Compliance                  Dockets Office between 9:00 a.m. and
                                                                                                            (AMOCs)                                                5:00 p.m., Monday through Friday,
                                                    List of Subjects in 14 CFR Part 39
                                                                                                              The Manager, Engine Certification Office,            except Federal holidays.
                                                      Air transportation, Aircraft, Aviation                FAA, may approve AMOCs for this AD. Use                   FAA Order 7400.11A, Airspace
                                                    safety, Incorporation by reference,                     the procedures found in 14 CFR 39.19 to
                                                                                                            make your request. You may email your
                                                                                                                                                                   Designations and Reporting Points, and
                                                    Safety.                                                 request to: ANE-AD-AMOC@faa.gov.                       subsequent amendments can be viewed
                                                    The Proposed Amendment                                                                                         online at http://www.faa.gov/air_traffic/
                                                                                                            (i) Related Information                                publications/. For further information,
                                                      Accordingly, under the authority                         For more information about this AD,                 you can contact the Airspace Policy
                                                    delegated to me by the Administrator,                   contact Herman Mak, Aerospace Engineer,                Group, Federal Aviation
                                                    the FAA proposes to amend 14 CFR part                   Engine Certification Office, FAA, Engine &             Administration, 800 Independence
                                                                                                            Propeller Directorate, 1200 District Avenue,           Avenue SW., Washington, DC 20591;
                                                    39 as follows:
                                                                                                            Burlington, MA 01803; phone: 781–238–
                                                                                                            7147; fax: 781–238–7199; email:
                                                                                                                                                                   telephone: 202–267–8783. The Order is
                                                    PART 39—AIRWORTHINESS                                                                                          also available for inspection at the
                                                                                                            herman.mak@faa.gov.
                                                    DIRECTIVES                                                                                                     National Archives and Records
                                                                                                              Issued in Burlington, Massachusetts, on              Administration (NARA). For
                                                    ■ 1. The authority citation for part 39                 January 12, 2017.
                                                                                                                                                                   information on the availability of FAA
                                                    continues to read as follows:                           Colleen M. D’Alessandro,                               Order 7400.11A at NARA, call 202–741–
                                                                                                            Manager, Engine & Propeller Directorate,               6030, or go to http://www.archives.gov/
                                                        Authority: 49 U.S.C. 106(g), 40113, 44701.
                                                                                                            Aircraft Certification Service.                        federal_register/code_of_federal-
                                                    § 39.13   [Amended]                                     [FR Doc. 2017–01227 Filed 1–19–17; 8:45 am]            regulations/ibr_locations.html.
                                                                                                            BILLING CODE 4910–13–P
                                                    ■ 2. The FAA amends § 39.13 by adding                                                                            FAA Order 7400.11, Airspace
                                                    the following new airworthiness                                                                                Designations and Reporting Points, is
                                                    directive (AD):                                                                                                published yearly and effective on
                                                                                                            DEPARTMENT OF TRANSPORTATION
                                                    General Electric Company: Docket No. FAA–                                                                      September 15.
                                                       2016–9490; Directorate Identifier 2016–              Federal Aviation Administration                        FOR FURTHER INFORMATION CONTACT:   Tom
                                                       NE–26–AD.                                                                                                   Clark, Federal Aviation Administration,
                                                    (a) Comments Due Date                                   14 CFR Part 71                                         Operations Support Group, Western
                                                      We must receive comments by March 9,                  [Docket No. FAA–2016–9355; Airspace                    Service Center, 1601 Lind Avenue SW.,
                                                    2017.                                                   Docket No. 16–ANM–8]                                   Renton, WA 98057; telephone (425)
                                                                                                                                                                   203–4511.
                                                    (b) Affected ADs                                        Proposed Amendment of Class D and                      SUPPLEMENTARY INFORMATION:
                                                      None.                                                 Class E Airspace; Hailey, ID
                                                    (c) Applicability                                                                                              Authority for This Rulemaking
                                                                                                            AGENCY: Federal Aviation
                                                       This AD applies to General Electric                  Administration (FAA), DOT.                               The FAA’s authority to issue rules
                                                    Company (GE) CF6–80C2L1F turbofan                       ACTION: Notice of proposed rulemaking                  regarding aviation safety is found in
                                                    engines with a high-pressure turbine (HPT)                                                                     Title 49 of the United States Code.
                                                                                                            (NPRM).
                                                    spacer/impeller, part number (P/N)                                                                             Subtitle I, Section 106 describes the
                                                    1539M12P02, installed.                                  SUMMARY:   This action proposes to                     authority of the FAA Administrator.
                                                    (d) Subject                                             modify Class D airspace, Class E surface               Subtitle VII, Aviation Programs,
                                                      Joint Aircraft System Component (JASC)                area airspace, and Class E airspace                    describes in more detail the scope of the
                                                    Code 7250, Turbine/Turboprop Engine—                    extending upward from 700 feet above                   agency’s authority. This rulemaking is
                                                    Turbine Section.                                        the surface at Friedman Memorial                       promulgated under the authority
mstockstill on DSK3G9T082PROD with PROPOSALS




                                                                                                            Airport, Hailey, ID, to support the                    described in Subtitle VII, Part, A,
                                                    (e) Unsafe Condition
                                                                                                            implementation of new Area Navigation                  Subpart I, Section 40103. Under that
                                                       This AD was prompted by a reduction in               (RNAV) Global Positioning System                       section, the FAA is charged with
                                                    the life limit of the affected engines, which           (GPS) standard instrument approach
                                                    is the result of a revised operating profile. We
                                                                                                                                                                   prescribing regulations to assign the use
                                                    are issuing this AD to prevent failure of the
                                                                                                            procedures for Instrument Flight Rules                 of airspace necessary to ensure the
                                                    HPT spacer/impeller, uncontained release of             (IFR) at the airport.                                  safety of aircraft and the efficient use of
                                                    the HPT spacer/impeller, damage to the                  DATES: Comments must be received on                    airspace. This regulation is within the
                                                    engine, and damage to the airplane.                     or before March 9, 2017.                               scope of that authority as it would


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Document Created: 2017-01-20 01:30:21
Document Modified: 2017-01-20 01:30:21
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionProposed Rules
ActionNotice of proposed rulemaking (NPRM).
DatesWe must receive comments on this proposed AD by March 9, 2017.
ContactHerman Mak, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7147; fax: 781- 238-7199; email: [email protected]
FR Citation82 FR 7734 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

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