Document ID: FAA-2017-0770-0007
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: The Boeing Company Airplanes
Posted Date: 2018-04-16T04:00Z

[Federal Register Volume 83, Number 73 (Monday, April 16, 2018)]
[Rules and Regulations]
[Pages 16194-16198]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-07638]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0770; Product Identifier 2017-NM-030-AD; Amendment 
39-19251; AD 2018-07-20]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are superseding Airworthiness Directive (AD) 2014-03-07, 
which applied to certain The Boeing Company Model MD-11 and MD-11F 
airplanes. AD 2014-03-07 required inspecting certain locations of the 
wire bundles of the center upper auxiliary fuel tank for damage, and 
corrective action if necessary. AD 2014-03-07 also required installing 
nonmetallic barrier/shield sleeving, new clamps, new attaching 
hardware, and a new extruded channel. This AD adds certain inspections 
and expands the applicability. This AD was prompted by the 
determination that it is necessary to require an inspection of the wire 
bundles for damage at certain center upper auxiliary fuel tank 
locations on certain airplanes. We are issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective May 21, 2018.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of May 21, 
2018.
    The Director of the Federal Register approved the incorporation by 
reference of a certain other publication listed in this AD as of March 
26, 2014 (79 FR 9392, February 19, 2014).
    The Director of the Federal Register approved the incorporation by 
reference of a certain other publication listed in this AD as of 
February 4, 2010 (74 FR 69249, December 31, 2009).

ADDRESSES: For service information identified in this final rule, 
contact Boeing Commercial Airplanes, Attention: Contractual & Data 
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 
90740; telephone 562-797-1717; internet https://www.myboeingfleet.com. 
You may view this service information at the FAA, Transport Standards 
Branch, 2200 South 216th St., Des Moines, WA. For information on the 
availability of this material at the FAA, call 206-231-3195. It is also 
available on the internet at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2017-0770.

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-
0770; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this final rule, the regulatory evaluation, any comments received, and 
other information. The address for Docket Operations (phone: 800-647-
5527) is Docket Operations, U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Samuel Lee, Aerospace Engineer, 
Propulsion Section, FAA, Los Angeles ACO Branch, 3960 Paramount 
Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5262; fax: 562-627-
5210; email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2014-03-07, Amendment 39-17744 (79 FR 9392, 
February 19, 2014) (``AD 2014-03-07''). AD 2014-03-07 applied to 
certain The Boeing Company Model MD-11 and MD-11F airplanes. The NPRM 
published in the Federal Register on August 17, 2017 (82 FR 39062). The 
NPRM was prompted by the determination that it is necessary to require 
an inspection of the wire bundles for damage at certain center upper 
auxiliary fuel tank locations on certain airplanes. The NPRM proposed 
to continue to require inspecting certain locations of the wire bundles 
of the center upper auxiliary fuel tank for damage, and corrective 
action if necessary. The NPRM also proposed to continue to require 
installing nonmetallic barrier/shield sleeving, new clamps, new 
attaching hardware, and a new extruded channel. The NPRM proposed to 
add certain inspections and expand the applicability. We are issuing 
this AD to reduce the potential of ignition sources inside fuel tanks, 
which, in combination with flammable fuel vapors, could result in fuel 
tank explosions and consequent loss of the airplane.

[[Page 16195]]

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comments received on the NPRM and 
the FAA's response to each comment.

Supportive Comments

    The Air Line Pilots Association, International and Boeing supported 
the content of the NPRM.

Request To Clarify NPRM Requirements

    FedEx Express (FedEx) asked that the requirements in the NPRM 
relative to the referenced service information be clarified. FedEx 
stated that Boeing Service Bulletin MD11-28-126 has been revised 6 
times, and its related AD has been superseded twice; therefore, the 
NPRM requirements are confusing. FedEx added that the NPRM might need 
to be re-written completely to clearly state what the new requirements 
are, since some operators have accomplished either the original issue 
or one or more of Revisions 1 through 5 of Boeing Service Bulletin 
MD11-28-126. FedEx stated that it has accomplished Boeing Service 
Bulletin MD11-28-126, Revision 4, dated November 29, 2011; and at the 
time those procedures were done, the FedEx fleet was classified as 
Group 1, Configuration 1, and Group 2, Configuration 1 airplanes 
because FedEx didn't accomplish prior revisions of the service 
information. FedEx noted that currently its airplanes are Group 1, 
Configuration 2, and Group 2, Configuration 2, because FedEx has 
accomplished prior revisions of Boeing Service Bulletin MD11-28-126 on 
its airplanes.
    We acknowledge the commenter's request and agree to clarify. The 
new requirements of this AD apply only to certain airplanes identified 
in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016. 
As noted by the commenter, for a given airplane, the group and 
configuration might have changed between Boeing Service Bulletin MD11-
28-126, Revision 4, dated November 29, 2011, and Boeing Service 
Bulletin MD11-28-126, Revision 6, dated July 1, 2016.
    Group 1, Configuration 1 airplanes in Boeing Service Bulletin MD11-
28-126, Revision 4, dated November 29, 2011, are defined as airplanes 
on which ``prior issues of this service bulletin'' have not been 
accomplished. If the actions specified in Boeing Service Bulletin MD11-
28-126, Revision 4, dated November 29, 2011, have been done on one of 
these airplanes, this airplane becomes a Group 1 Configuration 2 
airplane as defined in Boeing Service Bulletin MD11-28-126, Revision 6, 
dated July 1, 2016, (airplanes on which ``prior issues of this service 
bulletin'' have been accomplished). Therefore, for this airplane, the 
inspections specified in Boeing Service Bulletin MD11-28-126, Revision 
6, dated July 1, 2016, for its new configuration must be done.
    The inspections in paragraph (i) of this AD must be done for 
airplanes identified as Groups 1, 2, and 5, Configuration 2 airplanes 
in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016. 
For this configuration, Boeing Service Bulletin MD11-28-126, Revision 
6, dated July 1, 2016, adds certain work instructions that were not in 
Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 
2011; or Boeing Service Bulletin MD11-28-126, Revision 5, dated July 
29, 2014. Therefore, we have not changed this AD in this regard.

Request To Clarify New Inspection Requirements

    FedEx asked that the new inspection requirements specified in the 
proposed AD be clarified. FedEx stated that the proposed AD would 
retain all requirements of AD 2014-03-07, and would add inspection 
requirements for certain airplanes, as well as expanding the 
applicability. FedEx noted that Boeing Service Bulletin MD11-28-126, 
Revision 6, dated July 1, 2016, adds new inspection requirements but 
does not specify that the inspection be done at additional locations, 
as indicated in the proposed AD. FedEx added that the work instructions 
specified in Revisions 4 and 6 of Boeing Service Bulletin MD11-28-126 
are for the same area, so it is not clear which additional locations 
are mandated by the proposed AD.
    We agree to clarify. Boeing Service Bulletin MD11-28-126, Revision 
6, dated July 1, 2016, adds an inspection to determine if the wire 
bundles routed above the center upper auxiliary fuel tank between floor 
beams touch the upper surface of the tank for Groups 1, 2, and 5, 
Configuration 2 airplanes. We acknowledge that the phrase ``additional 
locations'' is unclear, and we have revised paragraph (i)(1) of this AD 
to state ``Do a general visual inspection of the wire bundles at the 
applicable center upper auxiliary fuel tank locations . . .'' Boeing 
Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016, 
identifies the applicable inspection areas.

Request To Specify Airplane Configuration

    FedEx asked that the airplane configurations specified in the 
proposed AD be clarified. FedEx stated that paragraph (i) of the 
proposed AD specifies the following: ``For Groups 1, 2, and 5 
Configuration 2 airplanes, as identified in Boeing Service Bulletin 
MD11-28-126, Revision 6, dated July 1, 2016.'' FedEx added that, as 
defined in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 
1, 2016, the FedEx fleet will be Group 1, Configuration 2 and Group 2, 
Configuration 2 airplanes because FedEx has accomplished a prior 
revision of this service information. FedEx believes its fleet should 
be in Group 1, Configuration 1, and Group 2, Configuration 1, but 
stated that it is not clear which airplanes are in which groups and 
configurations.
    We acknowledge the commenter's request and provide the following 
clarification. Paragraph 1.A., ``Effectivity'' of Boeing Service 
Bulletin MD11-28-126, Revision 6, dated July 1, 2016, specifies that 
airplanes on which previous issues of the service information have been 
done are identified as Configuration 2 airplanes. Therefore, any 
airplanes on which any previous issue of the service information was 
accomplished would be classified as Configuration 2. We have not 
changed this AD in this regard.

Request for Credit for Previous Actions Accomplished

    FedEx and United Parcel Service (UPS) requested credit for previous 
accomplishment of the actions in paragraphs (i)(1) and (i)(2) of the 
proposed AD using Boeing Service Bulletin MD11-28-126, Revision 4, 
dated November 29, 2011.
    FedEx stated that new inspections and corrective actions as 
specified in paragraphs (i)(1) and (i)(2) of the proposed AD were 
already performed by FedEx per Boeing Service Bulletin MD11-28-126, 
Revision 4, dated November 29, 2011, and should not be performed again. 
FedEx believes the proposed AD should give credit for work accomplished 
under Boeing Service Bulletin MD11-28-126, Revision 4, dated November 
29, 2011.
    UPS stated that prior accomplishment of Boeing Service Bulletin 
MD11-28-126, Revision 4, dated November 29, 2011, for Groups 1 and 2, 
Configuration 1 freighter aircraft meets the requirements of Boeing 
Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016. UPS 
stated that the additional steps added by Revisions 5 and 6 of

[[Page 16196]]

Boeing Service Bulletin MD11-28-126 are not applicable to airplanes in 
freighter configurations or have already been accomplished using Boeing 
Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011. UPS 
added that no further actions should be required on those airplanes.
    We agree to clarify. As stated previously, Boeing Service Bulletin 
MD11-28-126, Revision 6, dated July 1, 2016, adds an inspection to 
determine if the wire bundles routed above the center upper auxiliary 
fuel tank between floor beams touch the upper surface of the tank for 
Groups 1, 2, and 5, Configuration 2 airplanes. This inspection was not 
included in Boeing Service Bulletin MD11-28-126, Revision 5, dated July 
29, 2014; nor any of the previous revisions of Boeing Service Bulletin 
MD11-28-126. In addition, for compliance with this AD, this inspection 
must be done before the detailed inspection specified in Boeing Service 
Bulletin MD11-28-126, Revision 6, dated July 1, 2016, for Groups 1, 2, 
and 5, Configuration 2 airplanes. However, under the provisions of 
paragraph (m) of this AD, we will consider requests for approval of 
alternative methods of compliance (AMOCs) if sufficient data are 
submitted to substantiate that the actions would provide an acceptable 
level of safety. We have not changed this AD in this regard.
    We also partially agree with the commenter. The new requirements in 
Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016, do 
not apply to certain freighter airplanes. Freighter airplanes are 
included in the procedures for Groups 1 and 5, Configuration 2 
airplanes, but not for Group 2, Configuration 2 airplanes, as specified 
in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016. 
Only passenger airplanes are included in the procedures for Group 2, 
Configuration 2 airplanes in Boeing Service Bulletin MD11-28-126, 
Revision 6, dated July 1, 2016. Therefore, we have added ``as 
applicable'' to the introductory text to paragraph (i) of this AD to 
clarify that the actions in paragraphs (i)(1) and (i)(2) of this AD 
apply to Groups 1 and 5, Configuration 2 airplanes, and passenger 
airplanes in Group 2, Configuration 2.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this AD as proposed, except for minor editorial changes. We have 
determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Service Bulletin MD11-28-126, Revision 6, dated 
July 1, 2016. This service information describes procedures for 
inspecting certain wire bundles of the center auxiliary fuel tank for 
damage, and repairing or replacing damaged wires. This service 
information also describes procedures for installing barrier/shield 
sleeving, clamping, and an extruded channel. This service information 
is reasonably available because the interested parties have access to 
it through their normal course of business or by the means identified 
in the ADDRESSES section.

Costs of Compliance

    We estimate that this AD affects 125 airplanes of U.S. registry. We 
estimate the following costs to comply with this AD:

                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                        Cost on U.S.
               Action                         Labor cost                         Parts cost                    Cost per product          operators
--------------------------------------------------------------------------------------------------------------------------------------------------------
Inspection/installation [retained    168 to 182 work-hours x $85  $15,708 to $28,005......................  $29,988 to             $3,748,500 to
 actions from AD 2009-26-16,          per hour = $14,280 to                                                 $43,475 per            $5,434,375 per
 Amendment 39-16155 (74 FR 69249,     $15,470 per inspection                                                 inspection cycle.      inspection cycle.
 December 31, 2009)].                 cycle.
Inspection/installation for Groups   Up to 9 work-hours x $85     $6,166..................................  Up to $6,931.........  Up to $866,375.
 1, 2, and 5, all Configuration 2     per hour = $765.
 airplanes (retained actions from
 AD 2014-03-07).
Inspection/installation for Groups   Up to 4 work-hours x $85     $0......................................  Up to $340...........  Up to $42,500.
 1, 2, and 5, all Configuration 2     per hour = $340.
 airplanes (new action).
Inspection/installation for Line     4 work-hours x $85 per hour  $28,005.................................  $340.................  $28,345.
 Number 579 (new action).             = $340.
--------------------------------------------------------------------------------------------------------------------------------------------------------

    We have received no definitive data that enables us to provide cost 
estimates for the on-condition actions specified in this AD.

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 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 and 
associated appliances to the Director of the System Oversight Division.

[[Page 16197]]

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

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 removing Airworthiness Directive (AD) 
2014-03-07, Amendment 39-17744 (79 FR 9392, February 19, 2014), and 
adding the following new AD:

2018-07-20 The Boeing Company: Amendment 39-19251; Docket No. FAA-
2017-0770; Product Identifier 2017-NM-030-AD.

(a) Effective Date

    This AD is effective May 21, 2018.

(b) Affected ADs

    This AD replaces AD 2014-03-07, Amendment 39-17744 (79 FR 9392, 
February 19, 2014) (``AD 2014-03-07'').

(c) Applicability

    This AD applies to The Boeing Company Model MD-11 and MD-11F 
airplanes, certificated in any category, as identified in Boeing 
Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) Unsafe Condition

    This AD was prompted by fuel system reviews conducted by the 
manufacturer that indicated the need to inspect wire bundles at 
certain locations of the center upper auxiliary fuel tanks in 
addition to inspection locations required by AD 2014-03-07. We are 
issuing this AD to reduce the potential of ignition sources inside 
fuel tanks, which, in combination with flammable fuel vapors, could 
result in fuel tank explosions and consequent loss of the airplane.

(f) Compliance

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

(g) Retained Inspection and Corrective Action, With Revised Service 
Information

    This paragraph restates the requirements of paragraph (g) of AD 
2014-03-07, with revised service information. For airplanes 
identified in Boeing Service Bulletin MD11-28-126, Revision 1, dated 
June 18, 2009: Within 60 months after February 4, 2010 (the 
effective date of AD 2009-26-16, Amendment 39-16155 (74 FR 69249, 
December 31, 2009)), do the actions specified in paragraphs (g)(1) 
through (g)(5) of this AD, and do all applicable corrective actions, 
in accordance with the Accomplishment Instructions of Boeing Service 
Bulletin MD11-28-126, Revision 1, dated June 18, 2009; Revision 4, 
dated November 29, 2011; or Revision 6, dated July 1, 2016; except 
as required by paragraph (k) of this AD. As of the effective date of 
this AD, only Boeing Service Bulletin MD11-28-126, Revision 6, dated 
July 1, 2016, may be used to accomplish the actions required by this 
paragraph. Do all applicable corrective actions before further 
flight.

    (1) Do a general visual inspection of the wire bundles between 
Stations 1238.950 and 1361.000 to determine if wires touch the upper 
surface of the center upper auxiliary fuel tank, and mark the 
location, as applicable.
    (2) Do a detailed inspection for splices and damage of all wire 
bundles above the center upper auxiliary fuel tank between Stations 
1218.950 and 1381.000.
    (3) Do a detailed inspection for damage (burn marks) of the 
upper surface of the center upper auxiliary fuel tank.
    (4) Do a detailed inspection for damage (burn marks) on the fuel 
vapor barrier seal.
    (5) Install a nonmetallic barrier/shield sleeving, new clamps, 
new attaching hardware, and a new extruded channel.

(h) Retained Additional Inspections and Corrective Action, With Revised 
Service Information

    This paragraph restates the requirements of paragraph (h) of AD 
2014-03-07, with revised service information. For airplanes in Group 
1, Configuration 2; Group 2, Configuration 2; and Group 5, 
Configuration 2; as identified in Boeing Service Bulletin MD11-28-
126, Revision 4, dated November 29, 2011: Within 60 months after 
March 26, 2014 (the effective date of AD 2014-03-07), do a detailed 
inspection of wire bundles for splices and damage (chafing, arcing, 
and broken insulation) and damage (burn marks) on the upper surface 
of the center upper auxiliary fuel tank and fuel vapor barrier seal; 
install barrier/shield sleeving and clamping; and do all applicable 
corrective actions at the applicable locations specified in 
paragraphs (h)(1) through (h)(3) of this AD, in accordance with the 
Accomplishment Instructions of Boeing Service Bulletin MD11-28-126, 
Revision 4, dated November 29, 2011; or Boeing Service Bulletin 
MD11-28-126, Revision 6, dated July 1, 2016; except as required by 
paragraph (k) of this AD. As of the effective date of this AD, only 
Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016, 
may be used to accomplish the actions required by this paragraph. Do 
all applicable corrective actions before further flight.
    (1) For Group 1, Configuration 2 airplanes, between Stations 
1238.950 and 1381.000, Stations 1238.950 and 1256.000, and Stations 
1238.950 and 1256.800, depending on passenger or freighter 
configuration.
    (2) For Group 2, Configuration 2 airplanes, between Stations 
1238.950 and 1275.250, and Stations 1238.950 and 1275.250, passenger 
configuration only.
    (3) For Group 5, Configuration 2 airplanes, between Stations 
1381.000 and 1238.950.

(i) New Inspections and Corrective Actions for Certain Airplanes

    For Groups 1, 2, and 5 Configuration 2 airplanes, as identified 
in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 
2016: Within 60 months after the effective date of this AD, do the 
actions required by paragraphs (i)(1) and (i)(2) of this AD, as 
applicable, in accordance with the Accomplishment Instructions of 
Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016.
    (1) Do a general visual inspection of the wire bundles at the 
applicable center upper auxiliary fuel tank locations to determine 
if wires touch the upper surface of the fuel tank, and mark the 
location as applicable.
    (2) Do a detailed inspection of the wire bundles for splices and 
damage on the upper surface of the center upper auxiliary fuel tank 
and fuel vapor barrier seal; install barrier/shield sleeving, 
clamping, and extruded channels, as applicable; and do all 
applicable corrective actions before further flight; except as 
required by paragraph (k) of this AD.

(j) New Requirements for Line Number 579

    For airplane Line Number 579: Within 60 months after the 
effective date of this AD, do the actions specified in paragraphs 
(g)(1) through (g)(5) of this AD, and do all applicable corrective 
actions, in accordance with the Accomplishment Instructions of 
Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016, 
except as required by paragraph (k) of this AD. Do all applicable 
corrective actions before further flight.

[[Page 16198]]

(k) Exception to Service Information Specifications

    Where Boeing Service Bulletin MD11-28-126, Revision 1, dated 
June 18, 2009; Boeing Service Bulletin MD11-28-126, Revision 4, 
dated November 29, 2011; or Boeing Service Bulletin MD11-28-126, 
Revision 6, dated July 1, 2016; specifies to contact The Boeing 
Company for repair instructions: Before further flight, repair the 
auxiliary fuel tank using a method approved in accordance with the 
procedures specified in paragraph (m) of this AD.

(l) Credit for Previous Actions

    (1) This paragraph provides credit for actions required by 
paragraph (g) of this AD, if those actions were performed before 
March 26, 2014 (the effective date of AD 2014-03-07), using the 
service information specified in paragraph (l)(1)(i) or (l)(1)(ii) 
of this AD.
    (i) Boeing Service Bulletin MD11-28-126, Revision 2, dated 
November 18, 2010.
    (ii) Boeing Service Bulletin MD11-28-126, Revision 3, dated June 
3, 2011.
    (2) This paragraph provides credit for actions required by 
paragraph (h) of this AD, if those actions were performed before 
March 26, 2014 (the effective date of AD 2014-03-07), using Boeing 
Service Bulletin MD11-28-126, Revision 3, dated June 3, 2011.

(m) 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 (n)(1) of this AD. Information 
may be emailed to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, 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) AMOCs approved previously for AD 2014-03-07 are approved as 
AMOCs for the corresponding provisions of this AD.

(n) Related Information

    (1) For more information about this AD, contact Samuel Lee, 
Aerospace Engineer, Propulsion Section, FAA, Los Angeles ACO Branch, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5262; fax: 562-627-5210; email: [email protected].
    (2) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (o)(6) and (o)(7) of this AD.

(o) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
May 21, 2018.
    (i) Boeing Service Bulletin MD11-28-126, Revision 6, dated July 
1, 2016.
    (ii) Reserved.
    (4) The following service information was approved for IBR on 
March 26, 2014 (79 FR 9392, February 19, 2014).
    (i) Boeing Service Bulletin MD11-28-126, Revision 4, dated 
November 29, 2011.
    (ii) Reserved.
    (5) The following service information was approved for IBR on 
February 4, 2010 (74 FR 69249, December 31, 2009).
    (i) Boeing Service Bulletin MD11-28-126, Revision 1, dated June 
18, 2009.
    (ii) Reserved.
    (6) 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; 
telephone 562-797-1717; internet https://www.myboeingfleet.com.
    (7) You may view this service information at the FAA, Transport 
Standards Branch, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 
206-231-3195.
    (8) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Des Moines, Washington, on March 29, 2018.
Chris Spangenberg,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-07638 Filed 4-13-18; 8:45 am]
BILLING CODE 4910-13-P