83_FR_2386 83 FR 2375 - Airworthiness Directives; The Boeing Company Airplanes

83 FR 2375 - Airworthiness Directives; The Boeing Company Airplanes

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 83, Issue 11 (January 17, 2018)

Page Range2375-2378
FR Document2018-00662

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This proposed AD was prompted by reports of cracks found in the main landing gear (MLG) beam forward support fitting. This proposed AD would require repetitive inspections for cracking of the MLG beam forward support fitting, and applicable on-condition actions. We are proposing this AD to address the unsafe condition on these products.

Federal Register, Volume 83 Issue 11 (Wednesday, January 17, 2018)
[Federal Register Volume 83, Number 11 (Wednesday, January 17, 2018)]
[Proposed Rules]
[Pages 2375-2378]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-00662]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-1248; Product Identifier 2017-NM-162-AD]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

[[Page 2376]]


ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 
series airplanes. This proposed AD was prompted by reports of cracks 
found in the main landing gear (MLG) beam forward support fitting. This 
proposed AD would require repetitive inspections for cracking of the 
MLG beam forward support fitting, and applicable on-condition actions. 
We are proposing this AD to address the unsafe condition on these 
products.

DATES: We must receive comments on this proposed AD by March 5, 2018.

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 Boeing 
Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 
2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; 
telephone 562-797-1717; internet https://www.myboeingfleet.com. You may 
view this referenced service information at the FAA, Transport 
Standards Branch, 1601 Lind Avenue SW, Renton, WA. For information on 
the availability of this material at the FAA, call 425-227-1221. It is 
also available on the internet at http://www.regulations.gov by 
searching for and locating Docket No. FAA-2017-1248.

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-2017-
1248; 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 NPRM, 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: Payman Soltani, Aerospace Engineer, 
Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount 
Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5313; fax: 562-627-
5210; 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-2017-1248; 
Product Identifier 2017-NM-162-AD'' at the beginning of your comments. 
We specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this NPRM. We will consider all 
comments received by the closing date and may amend this NPRM 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

    We have received reports indicating that a crack was found in the 
MLG beam forward support fitting around the fastener locations common 
to the rear spar web, below the upper chord on the inboard side of the 
wing buttock line (WBL) 157 rib. Cracks were found on airplanes having 
62,706 to 65,827 total flight hours and 50,152 to 53,039 total flight 
cycles. Because cracks in the MLG beam forward support fitting at this 
location are entirely hidden--the forward side of the fitting (inside 
fuel tanks) by sealant, and the aft side by the rear spar web and MLG 
beam--they cannot be detected reliably during normal maintenance and 
therefore require additional inspections. This cracking of the MLG beam 
forward support fitting, if not corrected, could lead to a fuel leak, 
the inability of a principal structural element to carry limit load, or 
an MLG collapse that could prevent continued safe flight and landing.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Alert Service Bulletin 737-57A1334, dated 
September 26, 2017. The service information describes procedures for 
repetitive high frequency eddy current (HFEC) inspections for cracking 
of the MLG beam forward support fitting around the fastener locations 
common to the rear spar web, below the upper chord on the inboard side 
of the WBL 157 rib, and applicable on-condition actions (e.g., repair). 
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.

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 accomplishment of the actions 
identified as ``RC'' (required for compliance) in the Accomplishment 
Instructions of Boeing Alert Service Bulletin 737-57A1334, dated 
September 26, 2017, described previously, except for any differences 
identified as exceptions in the regulatory text of this proposed AD.
    For information on the procedures and compliance times, see this 
service information at http://www.regulations.gov by searching for and 
locating Docket No. FAA-2017-1248.

Explanation of Applicability

    Model 737 airplanes having line numbers 1 through 291 have a limit 
of validity (LOV) of 34,000 total flight cycles, and the actions 
proposed in this NPRM, as specified in Boeing Alert Service Bulletin 
737-57A1334, dated September 26, 2017, would be required at a 
compliance time occurring after that LOV. Although operation of an 
airplane beyond its LOV is prohibited by 14 CFR 121.1115 and 129.115, 
this NPRM would include those airplanes in the applicability so that 
these airplanes are tracked in the event the LOV is extended in the 
future.

Costs of Compliance

    We estimate that this proposed AD affects 160 airplanes of U.S. 
registry. We estimate the following costs to comply with this proposed 
AD:

[[Page 2377]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
             Action                     Labor cost          Parts cost     Cost per product        operators
----------------------------------------------------------------------------------------------------------------
HFEC inspections...............  Up to 81 work-hours x                $0  Up to $6,885 per    Up to $1,101,600
                                  $85 per hour = Up to                     inspection cycle.   per inspection
                                  $6,885 per inspection                                        cycle.
                                  cycle.
----------------------------------------------------------------------------------------------------------------

    We have received no definitive data that would enable us to provide 
cost estimates for the on-condition actions specified in this proposed 
AD. Because the number of work-hours can vary widely, depending on the 
inspection findings, these figures were not included in the service 
information.

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 proposed 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 transport category airplanes to the Director of the System Oversight 
Division.

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.
    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, 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):

The Boeing Company: Docket No. FAA-2017-1248; Product Identifier 
2017-NM-162-AD.

(a) Comments Due Date

    We must receive comments by March 5, 2018.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all The Boeing Company Model -100, -200, -
200C, -300, -400, and -500 series airplanes, certificated in any 
category.

(d) Subject

    Air Transport Association (ATA) of America Code 57, Wings.

(e) Unsafe Condition

    This AD was prompted by the report of a crack indication in the 
main landing gear (MLG) beam forward support fitting on the inboard 
side of the wing buttock line (WBL) 157 rib, and multiple reports of 
similar crack findings on other airplanes. We are issuing this AD to 
detect and correct cracking of the MLG beam forward support fitting 
on the inboard side of the WBL 157 rib. Undetected cracks could lead 
to a fuel leak, the inability of a principal structural element to 
carry limit load, or an MLG collapse that could prevent continued 
safe flight and landing.

(f) Compliance

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

(g) Required Actions

    (1) For Group 1 airplanes identified in Boeing Alert Service 
Bulletin 737-57A1334, dated September 26, 2017: Within 120 days 
after the effective date of this AD, inspect the airplane and do all 
applicable corrective actions using a method approved in accordance 
with the procedures specified in paragraph (i) of this AD.
    (2) For Group 2 airplanes identified in Boeing Alert Service 
Bulletin 737-57A1334, dated September 26, 2017: Except as required 
by paragraph (h) of this AD, at the applicable times specified in 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
737-57A1334, dated September 26, 2017, do all applicable actions 
identified as ``RC'' (required for compliance) in, and in accordance 
with, the Accomplishment Instructions of Boeing Alert Service 
Bulletin 737-57A1334, dated September 26, 2017.

(h) Exceptions to Service Information Specifications

    (1) Where Boeing Alert Service Bulletin 737-57A1334, dated 
September 26, 2017, uses the phrase ``after the original issue date 
of this service bulletin,'' for purposes of determining compliance 
with the requirements of this AD, the phrase ``after the effective 
date of this AD'' must be used.
    (2) Where Boeing Alert Service Bulletin 737-57A1334, dated 
September 26, 2017, specifies contacting Boeing, and specifies that 
action as RC: This AD requires using a method approved in accordance 
with the procedures specified in paragraph (i) of this AD.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Los Angeles ACO 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 (j)(1) of this AD. Information 
may be emailed to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector,

[[Page 2378]]

or lacking a principal inspector, the manager of the local flight 
standards district office/certificate holding district office.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair, modification, or alteration required by this AD 
if it is approved by the Boeing Commercial Airplanes Organization 
Designation Authorization (ODA) that has been authorized by the 
Manager, Los Angeles ACO Branch, to make those findings. To be 
approved, the repair method, modification deviation, or alteration 
deviation must meet the certification basis of the airplane, and the 
approval must specifically refer to this AD.
    (4) Except as required by paragraph (h)(2) of this AD: For 
service information that contains steps that are labeled as RC, the 
provisions of paragraphs (i)(4)(i) and (i)(4)(ii) of this AD apply.
    (i) The steps labeled as RC, including substeps under an RC step 
and any figures identified in an RC step, must be done to comply 
with the AD. If a step or substep is labeled ``RC Exempt,'' then the 
RC requirement is removed from that step or substep. An AMOC is 
required for any deviations to RC steps, including substeps and 
identified figures.
    (ii) Steps not labeled as RC may be deviated from using accepted 
methods in accordance with the operator's maintenance or inspection 
program without obtaining approval of an AMOC, provided the RC 
steps, including substeps and identified figures, can still be done 
as specified, and the airplane can be put back in an airworthy 
condition.

(j) Related Information

    (1) For more information about this AD, contact Payman Soltani, 
Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5313; fax: 562-627-5210; email: [email protected].
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Contractual & Data Services 
(C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-
5600; telephone 562-797-1717; internet https://www.myboeingfleet.com. You may view this referenced service 
information at the FAA, Transport Standards Branch, 1601 Lind Avenue 
SW, Renton, WA. For information on the availability of this material 
at the FAA, call 425-227-1221.

    Issued in Renton, Washington, on January 5, 2018.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-00662 Filed 1-16-18; 8:45 am]
 BILLING CODE 4910-13-P



                                                                      Federal Register / Vol. 83, No. 11 / Wednesday, January 17, 2018 / Proposed Rules                                                  2375

                                                    We are issuing this rulemaking under                 PART 39—AIRWORTHINESS                                  to the manager of the certification office,
                                                 the authority described in ‘‘Subtitle VII,              DIRECTIVES                                             send it to ATTN: Program Manager,
                                                 Part A, Subpart III, Section 44701:                                                                            Continuing Operational Safety, FAA, New
                                                                                                         ■ 1. The authority citation for part 39                York ACO Branch, 1600 Stewart Avenue,
                                                 General requirements.’’ Under that
                                                                                                         continues to read as follows:                          Suite 410, Westbury, NY 11590; telephone:
                                                 section, Congress charges the FAA with                                                                         516–228–7300; fax: 516–794–5531. Before
                                                 promoting safe flight of civil aircraft in                  Authority: 49 U.S.C. 106(g), 40113, 44701.         using any approved AMOC, notify your
                                                 air commerce by prescribing regulations                                                                        appropriate principal inspector, or lacking a
                                                 for practices, methods, and procedures                  § 39.13    [Amended]                                   principal inspector, the manager of the local
                                                 the Administrator finds necessary for                   ■ 2. The FAA amends § 39.13 by adding                  flight standards district office/certificate
                                                 safety in air commerce. This regulation                 the following new airworthiness                        holding district office.
                                                 is within the scope of that authority                   directive (AD):                                           (2) Contacting the Manufacturer: For any
                                                                                                                                                                requirement in this AD to obtain corrective
                                                 because it addresses an unsafe condition                Bombardier, Inc.: Docket No. FAA–2017–                 actions from a manufacturer, the action must
                                                 that is likely to exist or develop on                      1247; Product Identifier 2017–NM–085–               be accomplished using a method approved
                                                 products identified in this rulemaking                     AD.                                                 by the Manager, New York ACO Branch,
                                                 action.                                                 (a) Comments Due Date                                  FAA; or Transport Canada Civil Aviation
                                                    This proposed AD is issued in                                                                               (TCCA); or Bombardier, Inc.’s TCCA Design
                                                                                                           We must receive comments by March 5,
                                                 accordance with authority delegated by                                                                         Approval Organization (DAO). If approved by
                                                                                                         2018.
                                                                                                                                                                the DAO, the approval must include the
                                                 the Executive Director, Aircraft                                                                               DAO-authorized signature.
                                                                                                         (b) Affected ADs
                                                 Certification Service, as authorized by
                                                 FAA Order 8000.51C. In accordance                         None.                                                (i) Related Information
                                                 with that order, issuance of ADs is                     (c) Applicability                                         (1) Refer to Mandatory Continuing
                                                 normally a function of the Compliance                      This AD applies to Bombardier, Inc.,                Airworthiness Information (MCAI) Canadian
                                                 and Airworthiness Division, but during                  Model BD–100–1A10 airplanes, certificated              AD CF–2017–22, dated June 23, 2017, for
                                                 this transition period, the Executive                   in any category, serial numbers 20003                  related information. This MCAI may be
                                                                                                                                                                found in the AD docket on the internet at
                                                 Director has delegated the authority to                 through 20424 inclusive and 20426 through
                                                                                                         20500 inclusive.                                       http://www.regulations.gov by searching for
                                                 issue ADs applicable to transport                                                                              and locating Docket No. FAA–2017–1247.
                                                 category airplanes to the Director of the               (d) Subject                                               (2) For more information about this AD,
                                                 System Oversight Division.                                Air Transport Association (ATA) of                   contact Cesar Gomez, Aerospace Engineer,
                                                                                                         America Code 35, Oxygen.                               Airframe and Mechanical Systems Section,
                                                 Regulatory Findings                                                                                            FAA, New York ACO Branch, 1600 Stewart
                                                                                                         (e) Reason                                             Avenue, Suite 410, Westbury, NY 11590;
                                                   We determined that this proposed AD                                                                          telephone: 516–228–7318; fax: 516–794–
                                                 would not have federalism implications                     This AD was prompted by a report
                                                                                                         indicating that certain lanyards for the               5531.
                                                 under Executive Order 13132. This                       passenger oxygen masks located in the                     (3) For service information identified in
                                                 proposed AD would not have a                            airplane’s entry area are too long. The length         this AD, contact Bombardier, Inc., 400 Côte-
                                                 substantial direct effect on the States, on             of the oxygen mask lanyard might cause the             Vertu Road West, Dorval, Québec H4S 1Y9,
                                                 the relationship between the national                   safety pin tethered to the opposite end of the         Canada; telephone: 514–855–5000; fax: 514–
                                                 Government and the States, or on the                    lanyard to remain engaged in the oxygen flow           855–7401; email: thd.crj@
                                                 distribution of power and                               mechanism when the mask is pulled to the               aero.bombardier.com; internet: http://
                                                                                                         passenger’s face. We are issuing this AD to            www.bombardier.com. You may view this
                                                 responsibilities among the various                                                                             referenced service information at the FAA,
                                                 levels of government.                                   detect and correct lanyards that are too long,
                                                                                                         which might result in difficulties starting the        Transport Standards Branch, 1601 Lind
                                                   For the reasons discussed above, I                    flow of oxygen in an emergency.                        Avenue SW, Renton, WA. For information on
                                                 certify this proposed regulation:                                                                              the availability of this material at the FAA,
                                                                                                         (f) Compliance                                         call 425–227–1221.
                                                   1. Is not a ‘‘significant regulatory                     Comply with this AD within the
                                                 action’’ under Executive Order 12866;                                                                             Issued in Renton, Washington, on January
                                                                                                         compliance times specified, unless already             5, 2018.
                                                   2. Is not a ‘‘significant rule’’ under the            done.
                                                                                                                                                                Michael Kaszycki,
                                                 DOT Regulatory Policies and Procedures                  (g) Lanyard Replacement                                Acting Director, System Oversight Division,
                                                 (44 FR 11034, February 26, 1979);                          Within 36 months after the effective date           Aircraft Certification Service.
                                                   3. Will not affect intrastate aviation in             of this AD: For any entry area passenger               [FR Doc. 2018–00664 Filed 1–16–18; 8:45 am]
                                                 Alaska; and                                             oxygen mask dispensing unit (POMDU)                    BILLING CODE 4910–13–P
                                                                                                         having part number (P/N) 833–830–01,
                                                   4. Will not have a significant                        replace the lanyards in the POMDU with new
                                                 economic impact, positive or negative,                  lanyards having P/N 289–65–10, in
                                                 on a substantial number of small entities                                                                      DEPARTMENT OF TRANSPORTATION
                                                                                                         accordance with the Accomplishment
                                                 under the criteria of the Regulatory                    Instructions of Bombardier Service Bulletin
                                                                                                                                                                Federal Aviation Administration
                                                 Flexibility Act.                                        100–35–08, dated April 11, 2017.
                                                 List of Subjects in 14 CFR Part 39                      (h) Other FAA AD Provisions                            14 CFR Part 39
                                                                                                           The following provisions also apply to this
                                                   Air transportation, Aircraft, Aviation                AD:                                                    [Docket No. FAA–2017–1248; Product
ethrower on DSK3G9T082PROD with PROPOSALS




                                                 safety, Incorporation by reference,                       (1) Alternative Methods of Compliance                Identifier 2017–NM–162–AD]
                                                 Safety.                                                 (AMOCs): The Manager, New York ACO
                                                                                                         Branch, FAA, has the authority to approve              RIN 2120–AA64
                                                 The Proposed Amendment                                  AMOCs for this AD, if requested using the
                                                                                                         procedures found in 14 CFR 39.19. In                   Airworthiness Directives; The Boeing
                                                   Accordingly, under the authority                      accordance with 14 CFR 39.19, send your                Company Airplanes
                                                 delegated to me by the Administrator,                   request to your principal inspector or local
                                                 the FAA proposes to amend 14 CFR part                   Flight Standards District Office, as                   AGENCY:Federal Aviation
                                                 39 as follows:                                          appropriate. If sending information directly           Administration (FAA), DOT.


                                            VerDate Sep<11>2014   16:35 Jan 16, 2018   Jkt 244001   PO 00000   Frm 00003   Fmt 4702   Sfmt 4702   E:\FR\FM\17JAP1.SGM   17JAP1


                                                 2376                 Federal Register / Vol. 83, No. 11 / Wednesday, January 17, 2018 / Proposed Rules

                                                       Notice of proposed rulemaking
                                                 ACTION:                                                 5527) is in the ADDRESSES section.                     26, 2017. The service information
                                                 (NPRM).                                                 Comments will be available in the AD                   describes procedures for repetitive high
                                                                                                         docket shortly after receipt.                          frequency eddy current (HFEC)
                                                 SUMMARY:    We propose to adopt a new                                                                          inspections for cracking of the MLG
                                                                                                         FOR FURTHER INFORMATION CONTACT:
                                                 airworthiness directive (AD) for all The
                                                                                                         Payman Soltani, Aerospace Engineer,                    beam forward support fitting around the
                                                 Boeing Company Model 737–100, –200,
                                                                                                         Airframe Section, FAA, Los Angeles                     fastener locations common to the rear
                                                 –200C, –300, –400, and –500 series
                                                                                                         ACO Branch, 3960 Paramount                             spar web, below the upper chord on the
                                                 airplanes. This proposed AD was
                                                                                                         Boulevard, Lakewood, CA 90712–4137;                    inboard side of the WBL 157 rib, and
                                                 prompted by reports of cracks found in
                                                 the main landing gear (MLG) beam                        phone: 562–627–5313; fax: 562–627–                     applicable on-condition actions (e.g.,
                                                 forward support fitting. This proposed                  5210; email: payman.soltani@faa.gov.                   repair). This service information is
                                                 AD would require repetitive inspections                 SUPPLEMENTARY INFORMATION:                             reasonably available because the
                                                 for cracking of the MLG beam forward                                                                           interested parties have access to it
                                                                                                         Comments Invited                                       through their normal course of business
                                                 support fitting, and applicable on-
                                                 condition actions. We are proposing this                  We invite you to send any written                    or by the means identified in the
                                                 AD to address the unsafe condition on                   relevant data, views, or arguments about               ADDRESSES section.
                                                 these products.                                         this proposal. Send your comments to
                                                                                                                                                                FAA’s Determination
                                                 DATES: We must receive comments on                      an address listed under the ADDRESSES
                                                 this proposed AD by March 5, 2018.                      section. Include ‘‘Docket No. FAA–                       We are proposing this AD because we
                                                                                                         2017–1248; Product Identifier 2017–                    evaluated all the relevant information
                                                 ADDRESSES: You may send comments,
                                                 using the procedures found in 14 CFR                    NM–162–AD’’ at the beginning of your                   and determined the unsafe condition
                                                 11.43 and 11.45, by any of the following                comments. We specifically invite                       described previously is likely to exist or
                                                 methods:                                                comments on the overall regulatory,                    develop in other products of the same
                                                    • Federal eRulemaking Portal: Go to                  economic, environmental, and energy                    type design.
                                                 http://www.regulations.gov. Follow the                  aspects of this NPRM. We will consider
                                                                                                         all comments received by the closing                   Proposed AD Requirements
                                                 instructions for submitting comments.
                                                    • Fax: 202–493–2251.                                 date and may amend this NPRM
                                                                                                                                                                  This proposed AD would require
                                                    • Mail: U.S. Department of                           because of those comments.
                                                                                                                                                                accomplishment of the actions
                                                 Transportation, Docket Operations, M–                      We will post all comments we
                                                                                                         receive, without change, to http://                    identified as ‘‘RC’’ (required for
                                                 30, West Building Ground Floor, Room                                                                           compliance) in the Accomplishment
                                                 W12–140, 1200 New Jersey Avenue SE,                     www.regulations.gov, including any
                                                                                                         personal information you provide. We                   Instructions of Boeing Alert Service
                                                 Washington, DC 20590.
                                                                                                                                                                Bulletin 737–57A1334, dated September
                                                    • Hand Delivery: Deliver to Mail                     will also post a report summarizing each
                                                                                                         substantive verbal contact we receive                  26, 2017, described previously, except
                                                 address above between 9 a.m. and 5
                                                 p.m., Monday through Friday, except                     about this proposed AD.                                for any differences identified as
                                                 Federal holidays.                                                                                              exceptions in the regulatory text of this
                                                                                                         Discussion                                             proposed AD.
                                                    For service information identified in
                                                 this NPRM, contact Boeing Commercial                       We have received reports indicating                   For information on the procedures
                                                 Airplanes, Attention: Contractual & Data                that a crack was found in the MLG beam                 and compliance times, see this service
                                                 Services (C&DS), 2600 Westminster                       forward support fitting around the                     information at http://
                                                 Blvd., MC 110–SK57, Seal Beach, CA                      fastener locations common to the rear                  www.regulations.gov by searching for
                                                 90740–5600; telephone 562–797–1717;                     spar web, below the upper chord on the                 and locating Docket No. FAA–2017–
                                                 internet https://www.myboeing                           inboard side of the wing buttock line                  1248.
                                                 fleet.com. You may view this referenced                 (WBL) 157 rib. Cracks were found on
                                                 service information at the FAA,                         airplanes having 62,706 to 65,827 total                Explanation of Applicability
                                                 Transport Standards Branch, 1601 Lind                   flight hours and 50,152 to 53,039 total                   Model 737 airplanes having line
                                                 Avenue SW, Renton, WA. For                              flight cycles. Because cracks in the MLG               numbers 1 through 291 have a limit of
                                                 information on the availability of this                 beam forward support fitting at this                   validity (LOV) of 34,000 total flight
                                                 material at the FAA, call 425–227–1221.                 location are entirely hidden—the
                                                                                                                                                                cycles, and the actions proposed in this
                                                 It is also available on the internet at                 forward side of the fitting (inside fuel
                                                                                                                                                                NPRM, as specified in Boeing Alert
                                                 http://www.regulations.gov by searching                 tanks) by sealant, and the aft side by the
                                                                                                                                                                Service Bulletin 737–57A1334, dated
                                                 for and locating Docket No. FAA–2017–                   rear spar web and MLG beam—they
                                                                                                                                                                September 26, 2017, would be required
                                                 1248.                                                   cannot be detected reliably during
                                                                                                                                                                at a compliance time occurring after that
                                                                                                         normal maintenance and therefore
                                                 Examining the AD Docket                                                                                        LOV. Although operation of an airplane
                                                                                                         require additional inspections. This
                                                   You may examine the AD docket on                                                                             beyond its LOV is prohibited by 14 CFR
                                                                                                         cracking of the MLG beam forward
                                                 the internet at http://                                                                                        121.1115 and 129.115, this NPRM
                                                                                                         support fitting, if not corrected, could
                                                 www.regulations.gov by searching for                                                                           would include those airplanes in the
                                                                                                         lead to a fuel leak, the inability of a
                                                 and locating Docket No. FAA–2017–                                                                              applicability so that these airplanes are
                                                                                                         principal structural element to carry
                                                 1248; or in person at the Docket                        limit load, or an MLG collapse that                    tracked in the event the LOV is
                                                 Management Facility between 9 a.m.                      could prevent continued safe flight and                extended in the future.
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                                                 and 5 p.m., Monday through Friday,                      landing.                                               Costs of Compliance
                                                 except Federal holidays. The AD docket
                                                 contains this NPRM, the regulatory                      Related Service Information Under 1                       We estimate that this proposed AD
                                                 evaluation, any comments received, and                  CFR Part 51                                            affects 160 airplanes of U.S. registry. We
                                                 other information. The street address for                 We reviewed Boeing Alert Service                     estimate the following costs to comply
                                                 the Docket Office (phone: 800–647–                      Bulletin 737–57A1334, dated September                  with this proposed AD:




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                                                                      Federal Register / Vol. 83, No. 11 / Wednesday, January 17, 2018 / Proposed Rules                                                    2377

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

                                                 HFEC inspections .........    Up to 81 work-hours × $85 per hour = Up to                                $0   Up to $6,885 per in-      Up to $1,101,600 per
                                                                                $6,885 per inspection cycle.                                                    spection cycle.           inspection cycle.



                                                    We have received no definitive data                    (1) Is not a ‘‘significant regulatory                 this AD to detect and correct cracking of the
                                                 that would enable us to provide cost                    action’’ under Executive Order 12866,                   MLG beam forward support fitting on the
                                                 estimates for the on-condition actions                    (2) Is not a ‘‘significant rule’’ under               inboard side of the WBL 157 rib. Undetected
                                                                                                         the DOT Regulatory Policies and                         cracks could lead to a fuel leak, the inability
                                                 specified in this proposed AD. Because
                                                                                                                                                                 of a principal structural element to carry
                                                 the number of work-hours can vary                       Procedures (44 FR 11034, February 26,                   limit load, or an MLG collapse that could
                                                 widely, depending on the inspection                     1979),                                                  prevent continued safe flight and landing.
                                                 findings, these figures were not                          (3) Will not affect intrastate aviation
                                                 included in the service information.                    in Alaska, and                                          (f) Compliance
                                                                                                           (4) Will not have a significant                          Comply with this AD within the
                                                 Authority for This Rulemaking                           economic impact, positive or negative,                  compliance times specified, unless already
                                                                                                         on a substantial number of small entities               done.
                                                    Title 49 of the United States Code
                                                 specifies the FAA’s authority to issue                  under the criteria of the Regulatory                    (g) Required Actions
                                                 rules on aviation safety. Subtitle I,                   Flexibility Act.                                           (1) For Group 1 airplanes identified in
                                                 section 106, describes the authority of                 List of Subjects in 14 CFR Part 39                      Boeing Alert Service Bulletin 737–57A1334,
                                                 the FAA Administrator. Subtitle VII:                                                                            dated September 26, 2017: Within 120 days
                                                 Aviation Programs, describes in more                      Air transportation, Aircraft, Aviation                after the effective date of this AD, inspect the
                                                 detail the scope of the Agency’s                        safety, Incorporation by reference,                     airplane and do all applicable corrective
                                                 authority.                                              Safety.                                                 actions using a method approved in
                                                                                                                                                                 accordance with the procedures specified in
                                                    We are issuing this rulemaking under                 The Proposed Amendment                                  paragraph (i) of this AD.
                                                 the authority described in Subtitle VII,                                                                           (2) For Group 2 airplanes identified in
                                                                                                           Accordingly, under the authority
                                                 Part A, Subpart III, Section 44701:                                                                             Boeing Alert Service Bulletin 737–57A1334,
                                                                                                         delegated to me by the Administrator,
                                                 ‘‘General requirements.’’ Under that                                                                            dated September 26, 2017: Except as required
                                                                                                         the FAA proposes to amend 14 CFR part                   by paragraph (h) of this AD, at the applicable
                                                 section, Congress charges the FAA with
                                                                                                         39 as follows:                                          times specified in paragraph 1.E.,
                                                 promoting safe flight of civil aircraft in
                                                 air commerce by prescribing regulations                                                                         ‘‘Compliance,’’ of Boeing Alert Service
                                                                                                         PART 39—AIRWORTHINESS                                   Bulletin 737–57A1334, dated September 26,
                                                 for practices, methods, and procedures                  DIRECTIVES                                              2017, do all applicable actions identified as
                                                 the Administrator finds necessary for                                                                           ‘‘RC’’ (required for compliance) in, and in
                                                 safety in air commerce. This regulation                 ■ 1. The authority citation for part 39                 accordance with, the Accomplishment
                                                 is within the scope of that authority                   continues to read as follows:                           Instructions of Boeing Alert Service Bulletin
                                                 because it addresses an unsafe condition                    Authority: 49 U.S.C. 106(g), 40113, 44701.          737–57A1334, dated September 26, 2017.
                                                 that is likely to exist or develop on                                                                           (h) Exceptions to Service Information
                                                 products identified in this rulemaking                  § 39.13    [Amended]                                    Specifications
                                                 action.                                                 ■ 2. The FAA amends § 39.13 by adding                      (1) Where Boeing Alert Service Bulletin
                                                    This proposed AD is issued in                        the following new airworthiness                         737–57A1334, dated September 26, 2017,
                                                 accordance with authority delegated by                  directive (AD):                                         uses the phrase ‘‘after the original issue date
                                                 the Executive Director, Aircraft                        The Boeing Company: Docket No. FAA–                     of this service bulletin,’’ for purposes of
                                                 Certification Service, as authorized by                     2017–1248; Product Identifier 2017–                 determining compliance with the
                                                 FAA Order 8000.51C. In accordance                           NM–162–AD.                                          requirements of this AD, the phrase ‘‘after the
                                                 with that order, issuance of ADs is                                                                             effective date of this AD’’ must be used.
                                                                                                         (a) Comments Due Date                                      (2) Where Boeing Alert Service Bulletin
                                                 normally a function of the Compliance
                                                                                                           We must receive comments by March 5,                  737–57A1334, dated September 26, 2017,
                                                 and Airworthiness Division, but during                                                                          specifies contacting Boeing, and specifies
                                                                                                         2018.
                                                 this transition period, the Executive                                                                           that action as RC: This AD requires using a
                                                 Director has delegated the authority to                 (b) Affected ADs                                        method approved in accordance with the
                                                 issue ADs applicable to transport                         None.                                                 procedures specified in paragraph (i) of this
                                                 category airplanes to the Director of the                                                                       AD.
                                                                                                         (c) Applicability
                                                 System Oversight Division.                                                                                      (i) Alternative Methods of Compliance
                                                                                                            This AD applies to all The Boeing
                                                 Regulatory Findings                                                                                             (AMOCs)
                                                                                                         Company Model –100, –200, –200C, –300,
                                                                                                         –400, and –500 series airplanes, certificated              (1) The Manager, Los Angeles ACO Branch,
                                                   We determined that this proposed AD                                                                           FAA, has the authority to approve AMOCs
                                                                                                         in any category.
                                                 would not have federalism implications                                                                          for this AD, if requested using the procedures
                                                 under Executive Order 13132. This                       (d) Subject                                             found in 14 CFR 39.19. In accordance with
                                                 proposed AD would not have a                              Air Transport Association (ATA) of                    14 CFR 39.19, send your request to your
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                                                 substantial direct effect on the States, on             America Code 57, Wings.                                 principal inspector or local Flight Standards
                                                 the relationship between the national                                                                           District Office, as appropriate. If sending
                                                                                                         (e) Unsafe Condition                                    information directly to the manager of the
                                                 Government and the States, or on the
                                                                                                            This AD was prompted by the report of a              certification office, send it to the attention of
                                                 distribution of power and
                                                                                                         crack indication in the main landing gear               the person identified in paragraph (j)(1) of
                                                 responsibilities among the various                      (MLG) beam forward support fitting on the               this AD. Information may be emailed to: 9-
                                                 levels of government.                                   inboard side of the wing buttock line (WBL)             ANM-LAACO-AMOC-Requests@faa.gov.
                                                   For the reasons discussed above, I                    157 rib, and multiple reports of similar crack             (2) Before using any approved AMOC,
                                                 certify this proposed regulation:                       findings on other airplanes. We are issuing             notify your appropriate principal inspector,



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                                                 2378                 Federal Register / Vol. 83, No. 11 / Wednesday, January 17, 2018 / Proposed Rules

                                                 or lacking a principal inspector, the manager           DEPARTMENT OF TRANSPORTATION                           2600 Westminster Blvd., MC 110–SK57,
                                                 of the local flight standards district office/                                                                 Seal Beach, CA 90740; telephone 562–
                                                 certificate holding district office.                    Federal Aviation Administration                        797–1717; internet https://
                                                    (3) An AMOC that provides an acceptable                                                                     www.myboeingfleet.com. You may view
                                                 level of safety may be used for any repair,             14 CFR Part 39                                         this referenced service information at
                                                 modification, or alteration required by this                                                                   the FAA, Transport Standards Branch,
                                                                                                         [Docket No. FAA–2016–9523; Product
                                                 AD if it is approved by the Boeing                                                                             1601 Lind Avenue SW, Renton, WA. For
                                                                                                         Identifier 2016–NM–134–AD]
                                                 Commercial Airplanes Organization                                                                              information on the availability of this
                                                 Designation Authorization (ODA) that has                RIN 2120–AA64                                          material at the FAA, call 425–227–1221.
                                                 been authorized by the Manager, Los Angeles                                                                    It is also available on the internet at
                                                 ACO Branch, to make those findings. To be               Airworthiness Directives; The Boeing                   http://www.regulations.gov by searching
                                                 approved, the repair method, modification               Company Airplanes                                      for and locating Docket No. FAA–2016–
                                                 deviation, or alteration deviation must meet            AGENCY:  Federal Aviation                              9523.
                                                 the certification basis of the airplane, and the
                                                                                                         Administration (FAA), DOT.                             Examining the AD Docket
                                                 approval must specifically refer to this AD.
                                                    (4) Except as required by paragraph (h)(2)           ACTION: Supplemental notice of
                                                                                                                                                                  You may examine the AD docket on
                                                 of this AD: For service information that                proposed rulemaking (SNPRM);                           the internet at http://
                                                 contains steps that are labeled as RC, the              reopening of comment period.                           www.regulations.gov by searching for
                                                 provisions of paragraphs (i)(4)(i) and (i)(4)(ii)                                                              and locating Docket No. FAA–2016–
                                                                                                           We are revising an earlier
                                                                                                         SUMMARY:
                                                 of this AD apply.                                                                                              9523; or in person at the Docket
                                                                                               proposal to supersede Airworthiness
                                                    (i) The steps labeled as RC, including                                                                      Management Facility between 9 a.m.
                                                                                               Directive (AD) 2014–12–13, which
                                                 substeps under an RC step and any figures                                                                      and 5 p.m., Monday through Friday,
                                                                                               applies to all The Boeing Company
                                                 identified in an RC step, must be done to                                                                      except Federal holidays. The AD docket
                                                                                               Model 737–100, –200, –200C, –300,
                                                 comply with the AD. If a step or substep is                                                                    contains this SNPRM, the regulatory
                                                                                               –400, and –500 series airplanes. The
                                                 labeled ‘‘RC Exempt,’’ then the RC                                                                             evaluation, any comments received, and
                                                                                               first SNPRM proposed to revise the
                                                 requirement is removed from that step or                                                                       other information. The street address for
                                                 substep. An AMOC is required for any
                                                                                               proposal by expanding the inspection
                                                                                               area, and terminating, rather than                               the Docket Office (phone: 800–647–
                                                 deviations to RC steps, including substeps                                                                     5527) is in the ADDRESSES section.
                                                 and identified figures.                       superseding, the requirements of AD
                                                                                               2014–12–13, after accomplishment of                              Comments will be available in the AD
                                                    (ii) Steps not labeled as RC may be                                                                         docket shortly after receipt.
                                                 deviated from using accepted methods in       the initial inspections. This action
                                                                                               proposes to again revise the proposal by                         FOR FURTHER INFORMATION CONTACT:
                                                 accordance with the operator’s maintenance                                                                     Payman Soltani, Aerospace Engineer,
                                                 or inspection program without obtaining       requiring the installation of standard-
                                                                                               size fasteners for a certain configuration.                      Airframe Section, FAA, Los Angeles
                                                 approval of an AMOC, provided the RC steps,                                                                    ACO Branch, 3960 Paramount
                                                 including substeps and identified figures, canWe are proposing this AD to address the
                                                                                               unsafe condition on these products.                              Boulevard, Lakewood, CA 90712–4137;
                                                 still be done as specified, and the airplane
                                                                                               Since these actions impose an                                    phone: 562–627–5313; fax: 562–627–
                                                 can be put back in an airworthy condition.
                                                                                               additional burden over that proposed in                          5210; email: payman.soltani@faa.gov.
                                                 (j) Related Information                       the first SNPRM, we are reopening the                            SUPPLEMENTARY INFORMATION:
                                                    (1) For more information about this AD,    comment period to allow the public the                           Comments Invited
                                                 contact Payman Soltani, Aerospace Engineer, chance to comment on these proposed
                                                 Airframe Section, FAA, Los Angeles ACO        changes.                                                           We invite you to send any written
                                                 Branch, 3960 Paramount Boulevard,                                                                              relevant data, views, or arguments about
                                                                                               DATES: The comment period for the                                this proposal. Send your comments to
                                                 Lakewood, CA 90712–4137; phone: 562–627– SNPRM published in the Federal
                                                 5313; fax: 562–627–5210; email:                                                                                an address listed under the ADDRESSES
                                                                                               Register on August 11, 2017 (82 FR                               section. Include ‘‘Docket No. FAA–
                                                 payman.soltani@faa.gov.                       37549), is reopened.
                                                    (2) For service information identified in                                                                   2016–9523; Product Identifier 2016–
                                                                                                  We must receive comments on this                              NM–134–AD’’ at the beginning of your
                                                 this AD, contact Boeing Commercial            SNPRM by March 5, 2018.
                                                 Airplanes, Attention: Contractual & Data                                                                       comments. We specifically invite
                                                                                               ADDRESSES: You may send comments,                                comments on the overall regulatory,
                                                 Services (C&DS), 2600 Westminster Blvd.,
                                                 MC 110–SK57, Seal Beach, CA 90740–5600;
                                                                                               using the procedures found in 14 CFR                             economic, environmental, and energy
                                                 telephone 562–797–1717; internet https://
                                                                                               11.43 and 11.45, by any of the following                         aspects of this SNPRM. We will
                                                 www.myboeingfleet.com. You may view this      methods:                                                         consider all comments received by the
                                                 referenced service information at the FAA,       • Federal eRulemaking Portal: Go to                           closing date and may amend this
                                                 Transport Standards Branch, 1601 Lind         http://www.regulations.gov.    Follow the                        SNPRM because of those comments.
                                                 Avenue SW, Renton, WA. For information on instructions for submitting comments.                                  We will post all comments we
                                                 the availability of this material at the FAA,    • Fax: 202–493–2251.                                          receive, without change, to http://
                                                 call 425–227–1221.                               • Mail: U.S. Department of                                    www.regulations.gov, including any
                                                                                               Transportation, Docket Operations, M–                            personal information you provide. We
                                                    Issued in Renton, Washington, on January   30, West Building Ground Floor, Room                             will also post a report summarizing each
                                                 5, 2018.                                      W12–140, 1200 New Jersey Avenue SE,                              substantive verbal contact we receive
                                                 Michael Kaszycki,                             Washington, DC 20590.                                            about this proposed AD.
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                                                 Acting Director, System Oversight Division,      • Hand Delivery: Deliver to Mail
                                                 Aircraft Certification Service.               address above between 9 a.m. and 5                               Discussion
                                                 [FR Doc. 2018–00662 Filed 1–16–18; 8:45 am]   p.m., Monday through Friday, except                                We issued AD 2014–12–13,
                                                 BILLING CODE 4910–13–P
                                                                                               Federal holidays.                                                Amendment 39–17874 (79 FR 39300,
                                                                                                  For service information identified in                         July 10, 2014) (‘‘AD 2014–12–13’’). AD
                                                                                               this SNPRM, contact Boeing                                       2014–12–13 requires actions to address
                                                                                               Commercial Airplanes, Attention:                                 an unsafe condition on all The Boeing
                                                                                               Contractual & Data Services (C&DS),                              Company Model 737–100, –200, –200C,


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Document Created: 2018-10-26 09:55:16
Document Modified: 2018-10-26 09:55:16
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 5, 2018.
ContactPayman Soltani, Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5313; fax: 562-627- 5210; email: [email protected]
FR Citation83 FR 2375 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

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