[Federal Register Volume 85, Number 123 (Thursday, June 25, 2020)]
[Rules and Regulations]
[Pages 38055-38059]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-13481]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2020-0091; Product Identifier 2020-NM-012-AD; Amendment
39-19916; AD 2020-11-12]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain The Boeing Company Model 737-8 and 737-9 airplanes. This AD was
prompted by a report that certain exterior fairing panels on the top of
the engine nacelle and strut (the thumbnail fairing and mid strut
fairing panels) may not have the quality of electrical bonding
necessary to ensure adequate shielding of the underlying wiring from
the electromagnetic effects of high intensity radiated fields (HIRF),
which could potentially lead to a dual-engine power loss event and/or
display of hazardously misleading primary propulsion parameters. This
AD requires a detailed inspection of the thumbnail fairing panels and
mid strut fairing panels for excessive rework of the metallic (aluminum
foil) inner surface layer, replacement of any excessively reworked
panels, and modification of the thumbnail fairing assembly to ensure
adequate bonding. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective July 30, 2020.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of July 30,
2020.
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
90740-5600; telephone 562-797-1717; internet https://www.myboeingfleet.com. You may view this service information at the
FAA, Airworthiness Products Section, Operational Safety 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 https://www.regulations.gov by searching for and
locating Docket No. FAA-2020-0091.
Examining the AD Docket
You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0091; 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, any comments received, and other information. The
address for Docket Operations is 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: Christopher Baker, Aerospace Engineer,
Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des
Moines, WA 98198; phone and fax: 206-231-3552; email:
christopher.r.baker@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain The Boeing
Company Model 737-8 and 737-9 airplanes. The NPRM published in the
Federal Register on February 26, 2020 (85 FR 11000). The NPRM was
prompted by a report that certain exterior fairing panels on the top of
the engine nacelle and strut (the thumbnail fairing and mid strut
fairing panels) may not have the quality of electrical bonding
necessary to ensure adequate shielding of the underlying wiring from
the electromagnetic effects of HIRF, which could potentially lead to a
dual-engine power loss event and/or display of hazardously misleading
primary propulsion parameters. The NPRM proposed to require a detailed
inspection of the thumbnail fairing panels and mid strut fairing panels
for excessive rework of the metallic (aluminum foil) inner surface
layer, replacement of any excessively reworked panels, and modification
of the thumbnail fairing assembly to ensure adequate bonding.
The FAA is issuing this AD to address this condition, which could
result in a forced off-airport landing or excessive flightcrew
workload.
Comments
The FAA gave the public the opportunity to participate in
developing this final rule. The FAA received comments from several
organizations and individuals. The following discussion presents the
comments
[[Page 38056]]
received on the NPRM and the FAA's response to each comment.
Support for the NPRM
The Air Line Pilots Association, International (ALPA) and three
individuals expressed support for the NPRM.
Request To Exclude Certain Airplanes From the AD's Applicability
United Airlines (UAL) requested that the proposed AD be revised to
exclude airplanes that have not been delivered. UAL noted that the
proposed AD would apply to all Model 737-8 and 737-9 airplanes included
in line numbers 5602 through 7901, which is beyond the effectivity of
Boeing Special Attention Service Bulletin 737-54-1056, dated December
11, 2019. UAL reasoned that for airplanes that have not been delivered,
Boeing would incorporate the intent of the service bulletin at the
factory, which would provide an equivalent level of safety. UAL
suggested that if those airplanes are not excluded from the proposed
AD's applicability, the FAA should provide credit to prevent the need
for future alternative method of compliance (AMOC) requests.
The FAA agrees with the commenter, for the reasons the commenter
provided. The FAA has revised paragraph (c) of this AD to limit the
applicability to those airplanes identified in Boeing Special Attention
Service Bulletin 737-54-1056, dated December 11, 2019.
Request To Refer To Correct Part Numbers
American Airlines (AAL) and UAL requested that the proposed AD be
revised to correct the part number for the thumbnail fairing. UAL noted
that Figure 2 and Figure 8 of Boeing Special Attention Service Bulletin
737-54-1056, dated December 11, 2019, specify certain thumbnail
fairings, but those figures specify the incorrect part numbers. The
commenters noted that Boeing issued Information Notice 737-54-1056 IN
01, dated January 29, 2020, to correct the part numbers. This
Information Notice is in the docket for this rulemaking, attached to
the comment of Hainan Airlines Aviation Technic (Hainan). UAL added
that, although the Information Notice specifies the correct ``IS'' part
numbers, it specifies the wrong ``WAS'' part numbers, and noted that
Boeing plans to address this in a future Information Notice or service
bulletin revision. UAL asked that the final rule include an exception
to allow inspection and installation of thumbnail fairings having the
correct part number.
The FAA agrees with the commenters' requests. The FAA has added
paragraph (h) of this AD to include exceptions to the service
information; this includes paragraph (h)(1) of this AD, which
identifies the correct part numbers to be used when accomplishing the
service instructions. Operators must use part number 313A6110-5,
313A6110-7, or 313A6110-9 in lieu of part number 311A6111-5, 311A6111-
7, or 311A6111-9 when inspecting or installing affected thumbnail
fairings. The FAA has also redesignated subsequent paragraphs
accordingly.
Request To Clarify Rivet Hole Size
AAL suggested to the FAA that the proposed AD be revised to clarify
the rivet hole size called out for installing a nutplate. AAL stated
that note (d) to Figure 4 of Boeing Special Attention Service Bulletin
737-54-1056, dated December 11, 2019, specifies to drill a hole with a
diameter of ``0.192--0.196.'' AAL stated that Boeing confirmed the
rivet hole size will be corrected with a revised service bulletin.
The FAA agrees that the rivet hole size specified in note (d) to
Figure 4 of Boeing Special Attention Service Bulletin 737-54-1056,
dated December 11, 2019, is incorrect. SB 737-54-1056 Revision 1,
corrects this hole size diameter with the following language: ``(d)
Drill through Thumbnail Land Assembly with a hole Diameter of 0.097--
0.101.'' The FAA has added paragraph (h)(2) to this AD to clarify the
correct rivet hole size to use when installing a nutplate.
Request To Clarify the Inspection and Replacement Criteria for Critical
and Non-Critical Bonding Zones
Hainan requested that the proposed AD be revised to provide
clarification regarding the inspection and replacement criteria for
critical and non-critical bonding zones (which are specified in Step 4
of Boeing Special Attention Service Bulletin 737-54-1056, dated
December 11, 2019). Hainan noted that Boeing Information Notice 737-54-
1056 IN 01, dated January 29, 2020, provides clarity regarding the
inspection and the conditions that require replacement of the panels.
The FAA agrees with the commenter's request. The FAA has added
paragraph (h)(3) of this AD to clarify the inspection and replacement
criteria for critical bonding zones. The FAA has also added paragraph
(h)(4) of this AD to clarify the inspection and replacement criteria
for non-critical bonding zones.
Request To Revise Certain Background Information
Boeing requested that paragraph (e) of the proposed AD as well as
the SUMMARY and the Discussion section in SUPPLEMENTARY INFORMATION of
the NPRM be revised to be consistent with the potential aircraft system
impacts Boeing communicated in reporting this issue to the FAA prior to
issuance of the NPRM, and to remove any references to an unsafe
condition resulting from lightning strikes. Boeing stated that the
descriptions of the potential unsafe conditions in the proposed AD are
inconsistent with its subject matter expert's evaluation of the safety
issue. Boeing added that there is not a safety concern in the event of
a lightning strike, because all of the electrical and electronic
systems with wiring in the affected area retain sufficient margin
between their design and qualification levels and the lightning-induced
transient levels, even with the loss of electrical bonding of the foil-
lined panels in the engine strut. Boeing further noted that the
proposed AD does not mention the potential for displays of misleading
primary propulsion parameters on the flight deck displays. Boeing
stated that the proposed AD inaccurately describes a scenario where
HIRF or lightning induced on one engine's wiring could cross-couple to
the opposite engine's wiring via the common avionics system's
connections. Boeing provided suggestions for revised wording.
The FAA agrees with the commenter's request for the reasons
provided. Based on further analysis done after issuance of the NPRM,
the FAA has determined that lightning strikes are not a safety concern
for the unsafe condition identified in this AD. The FAA has revised the
SUMMARY and the Discussion section in SUPPLEMENTARY INFORMATION of this
final rule as well as paragraph (e) of this AD to incorporate the
changes requested by Boeing.
Request To Revise Special Flight Permit Conditions
Boeing requested that the special flight permit language in
paragraph (i) of the proposed AD be revised to provide guidance on the
HIRF spectrum of concern to operators. Boeing noted that the potential
for aircraft systems' exposure to HIRF levels higher than their
original qualification levels is limited to the frequency range between
1 MHz and 100 MHz. Boeing stated that operators do not need to consider
potential HIRF sources outside this frequency spectrum when assessing
routes for special flight permit requests.
[[Page 38057]]
Boeing added that providing clarification on the frequency range of
concern would reduce the burden on both operators and the FAA in
submitting and reviewing special flight permit requests.
The FAA agrees with the request because the agency has determined
that only the HIRF frequency range between 1 MHz and 100 MHz is of
concern. The FAA has revised paragraph (i) of this AD to clarify the
HIRF frequency range that must be identified when submitting a request
for a special flight permit.
Request To Change Compliance Time to Before Revenue Flight
Boeing requested that the compliance time in the proposed AD be
changed from ``before further flight'' to ``before revenue flight.''
Boeing noted that the compliance time in Boeing Special Attention
Service Bulletin 737-54-1056, dated December 11, 2019, is six months.
Boeing added that it is revising the service bulletin and plans to
change the compliance time to ``prior to revenue flight'' in the
revised service bulletin. Boeing noted that ``prior to revenue flight''
aligns with the Boeing safety review board recommendation.
The FAA disagrees with the commenter's request. Without the safety
features installed during the modification required by this AD,
airplanes are exposed to potentially unsafe electromagnetic effects.
The FAA has included provisions in paragraph (i) of this AD (paragraph
(h) of the proposed AD) for operators who may need to relocate an
airplane prior to accomplishing the actions required by this AD. The
FAA has not changed this AD regarding this issue.
Request To Revise Compliance Time To Include Options
Hainan requested that the compliance time for the proposed AD be
revised to ``within six months after the effective date of this AD or
before further flight, whichever occurs first.'' Hainan noted that
Boeing recommended a compliance time of within six months after the
original issue date of Boeing Special Attention Service Bulletin 737-
54-1056, dated December 11, 2019. Hainan suggested that, due to the
unknown return-to-service dates for the affected airplanes, a revised
compliance time would allow airlines to plan for the actions required
by this AD. Hainan pointed out that another recent AD on these same
airplane models has a compliance time of 24 months.
The FAA disagrees with the commenter's request. Without the safety
features installed during the modification required by this AD,
airplanes are exposed to potentially unsafe electromagnetic effects.
The FAA notes that the compliance time is designed to ensure the
actions required by this AD are done before further flight (i.e.,
before the affected airplanes are returned to service), and operators
may do these actions at any time before further flight. The FAA has not
changed this AD regarding this issue.
Request To Include a Grace Period
Hainan requested that the proposed AD be revised to provide a grace
period for the required modification. Hainan stated that Boeing can
only provide new panels based on the results of required inspections.
Hainan suggested that due to the international transportation impacts
caused by the 2019 Novel Coronavirus, new panels may not be available
to operators in a timely manner.
As a result of Hainan's comment, the FAA confirmed in June 2020
that a sufficient number of required parts will be available from the
manufacturer to modify the worldwide fleet within the compliance time
of the NPRM, which is adopted as proposed. However, under the
provisions of paragraph (j) of this AD, the FAA will consider requests
for approval of an extension of the compliance time if sufficient data
are submitted to substantiate that the new compliance time would
provide an acceptable level of safety. The FAA has not changed this AD
regarding this issue.
Request To Clarify Certain Requirements
Hainan requested that paragraph (g) of the proposed AD be revised
to specify ``replacement and modification'' rather than
``modification.'' Hainan noted that the actions in the proposed AD
include both modification and replacement.
Paragraph (g) of the proposed AD specified a detailed inspection
and the modification as applicable. Replacement is one part of the
modification, and is required only if excessive rework is found during
that inspection. Thus, the FAA has determined that specifying
``replacement and modification'' in paragraph (g) of this AD is not
necessary, and the agency has not changed this AD regarding this issue.
Request To Revise Wording Regarding Required Steps
Hainan requested that the wording in paragraph (g) of the proposed
AD be revised to specify ``Steps 4., 6. or 7. through 9., . . .''
instead of ``Steps 4., 6. through 9., inclusive . . . .'' Hainan noted
that Steps 6. and 7. of Boeing Special Attention Service Bulletin 737-
54-1056, dated December 11, 2019, are two different options for one
action.
The FAA acknowledges that Steps 6. and 7. of Boeing Special
Attention Service Bulletin 737-54-1056, dated December 11, 2019, are
two options for the same action. However, the FAA notes that this is
clearly stated in Boeing Special Attention Service Bulletin 737-54-
1056, dated December 11, 2019, which labels Step 6. as ``ACTION 2
(OPTION 1)'' and Step 7. as ``ACTION 2 (OPTION 2).'' Operators are
required to do only one of these options to show compliance with this
AD. The FAA has not changed this AD regarding this issue.
Request To Provide Steps for Deactivating Certain Slats
AAL suggested to the FAA that the proposed AD be revised to include
steps to deactivate the slats. AAL noted that Boeing recommended
deactivating the slats and thrust reversers using the Aircraft
Maintenance Manual (AMM) as an accepted procedure and stated such
instructions would be included in a revision of the service
information.
The FAA agrees that deactivating the slats prior to accomplishing
the actions specified in the service bulletin would help to protect any
maintenance personnel working on that area, and that the AMM provides
acceptable procedures for deactivating the slats. However, the FAA does
not agree with making slat deactivation a requirement of this AD, since
this procedure is not needed to address the unsafe condition. The FAA
has not changed this AD regarding this issue.
Request To Account for Possible Service Information Revision in the
Final Rule
AAL suggested to the FAA that the proposed AD be updated to account
for a revision of Boeing Special Attention Service Bulletin 737-54-
1056, dated December 11, 2019, if one exists. AAL noted that Boeing
stated that such a revision is in process and AAL asked if the FAA is
aware of such a revision.
The FAA acknowledges that Boeing has informed the agency of its
intent to issue revised service information. However, that revision has
not yet been published by Boeing. As stated earlier, the FAA has added
several exceptions to this AD to correct errors in Boeing Special
Attention Service Bulletin 737-54-1056, dated December 11, 2019. With
these exceptions, operators will be able to comply with this AD using
Boeing Special Attention Service Bulletin 737-54-1056, dated December
11, 2019.
[[Page 38058]]
Explanation of Additional Change to This AD
The FAA clarifies that where the AD specifies to perform certain
``Steps'' of the Boeing service bulletin, such steps refer to the
numbered actions specified within the Procedures section of the
Accomplishment Instructions. The FAA has revised paragraph (g) of this
AD to change the required procedures by not including steps 9 and 12 of
Boeing Special Attention Service Bulletin 737-54-1056, dated December
11, 2019. The FAA has determined that these steps, while expected to be
accomplished, are not required to address the unsafe condition
identified in this AD and this change makes this AD consistent with
revision 1 of the Boeing service information.
Conclusion
The FAA reviewed the relevant data, considered the comments
received, and determined that air safety and the public interest
require adopting this final rule with the changes described previously
and minor editorial changes. The FAA has 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 more burden upon the public than was already
proposed in the NPRM.
The FAA also determined that these changes will not increase the
economic burden on any operator or increase the scope of this final
rule.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Boeing Special Attention Service Bulletin 737-54-
1056, dated December 11, 2019. This service information describes
procedures for a detailed inspection of the thumbnail fairing panels
and mid strut fairing panels for excessive rework of the metallic
(aluminum foil) inner surface layer (resulting in foil cuts),
replacement of any excessively reworked panels, and modification of the
thumbnail fairing assembly to ensure adequate bonding. Modification
actions include doing a form-in-place gasket of the thumbnail land
assemblies; preparing the mating surfaces between the thumbnail fairing
panel and the left and right thumbnail land assemblies; and doing a
bond check of the thumbnail fairing panel and the thumbnail land
assemblies on the left and right side of the thumbnail fairing panel on
both engines. 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
The FAA estimates that this AD affects 128 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Inspection......................... 5 work-hours x $85 per hour $0 $425 $54,400
= $425.
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The FAA estimates the following costs to do any necessary
modifications that would be required based on the results of the
required inspection. The FAA has no way of determining the number of
aircraft that might need these modifications:
On-Condition Costs
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Action Labor cost Parts cost Cost per product
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Modification......................... Up to 7 work-hours x $85 per (*) Up to $595.*
hour = Up to $595.
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* The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the
on-condition actions specified in this AD.
According to the manufacturer, all of the costs of this AD will be
covered under warranty, thereby reducing the cost impact on affected
operators. The FAA does not control warranty coverage for affected
operators. As a result, the FAA has included all known costs in the
cost estimate.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
[[Page 38059]]
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 adding the following new airworthiness
directive (AD):
2020-11-12 The Boeing Company: Amendment 39-19916; Docket No. FAA-
2020-0091; Product Identifier 2020-NM-012-AD.
(a) Effective Date
This AD is effective July 30, 2020.
(b) Affected ADs
None.
(c) Applicability
This AD applies to The Boeing Company Model 737-8 and 737-9
airplanes, certificated in any category, as identified in Boeing
Special Attention Service Bulletin 737-54-1056, dated December 11,
2019.
(d) Subject
Air Transport Association (ATA) of America Code 54, Nacelles/
pylons.
(e) Unsafe Condition
This AD was prompted by a report that certain exterior fairing
panels on the top of the engine nacelle and strut (the thumbnail
fairing and mid strut fairing panels) may not have the quality of
electrical bonding necessary to ensure adequate shielding of the
underlying wiring from the electromagnetic effects of high intensity
radiated fields (HIRF), which could potentially lead to a dual-
engine power loss event and/or display of hazardously misleading
primary propulsion parameters. The FAA is issuing this AD to address
this condition, which could result in a forced off-airport landing
or excessive flightcrew workload.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Detailed Inspection and Modification
Before further flight, do a detailed inspection of the thumbnail
fairing panels and mid strut fairing panels for excessive rework of
the metallic (aluminum foil) inner surface layer, and, before
further flight, do the modification as applicable in accordance with
Steps 4., 6. through 8. inclusive, and 11. of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 737-54-
1056, dated December 11, 2019.
(h) Exceptions to Service Information Specifications
(1) Where Boeing Special Attention Service Bulletin 737-54-1056,
dated December 11, 2019, specifies thumbnail fairings having part
number ``311A6111-5 or 311A6111-7 or 311A6111-9,'' for this AD use
part number ``313A6110-5 or 313A6110-7 or 313A6110-9.''
(2) Where note (d) to Figure 4 of Boeing Special Attention
Service Bulletin 737-54-1056, dated December 11, 2019, specifies to
drill a hole with a diameter of ``0.192-0.196,'' for this AD the
hole diameter must be ``0.097-0.101.''
(3) For inspections of critical bonding areas, as specified in
Step 4.a. of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 737-54-1056, dated December 11, 2019, any
panel with cumulative foil cut lengths greater than 4.0 inches
within any 12.0 inches in length must be replaced; any panel with a
foil cut gap greater than 0.25 inch also must be replaced.
(4) For inspections of non-critical bonding areas, as specified
in Step 4.b. of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 737-54-1056, dated December 11, 2019, any
panel with cumulative foil cut lengths greater than 12.0 inches
within a 12.0-inch by 12.0-inch area must be replaced; any panel
with a foil cut gap greater than 0.25 inch also must be replaced.
(i) Special Flight Permit
Special flight permits, as described in 14 CFR 21.197 and
21.199, may be issued to operate the airplane to a location where
the requirements of this AD can be accomplished, but concurrence by
the Manager, Seattle ACO Branch, FAA, is required before issuance of
the special flight permit. Requests for a special flight permit must
be submitted to the FAA with a description of the electromagnetic
field radiation sources (type, location, frequency, and power level)
along the planned route. Only electromagnetic field radiation
sources operating in the frequency spectrum between 1 MHz and 100
MHz need to be identified when submitting a special flight permit
request (common examples of such sources include, but are not
limited to, short wave radio towers, FM radio towers, and some TV
broadcast transmitters). Send requests for a special flight permit
to the person identified in paragraph (k) of this AD.
(j) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle 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 (k) of this AD. Information may be
emailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
(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 Company Organization Designation
Authorization (ODA) that has been authorized by the Manager, Seattle
ACO Branch, FAA, 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.
(k) Related Information
For more information about this AD, contact Christopher Baker,
Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch,
2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231-
3552; email: christopher.r.baker@faa.gov.
(l) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Boeing Special Attention Service Bulletin 737-54-1056, dated
December 11, 2019.
(ii) [Reserved]
(3) 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.
(4) You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200
South 216th St., Des Moines, WA. For information on the availability
of this material at the FAA, call 206-231-3195.
(5) 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, email fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued on June 11, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2020-13481 Filed 6-24-20; 8:45 am]
BILLING CODE 4910-13-P