Proposed Rule2021-21787
Airworthiness Directives; The Boeing Company Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
October 6, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This proposed AD was prompted by significant changes, including new or more restrictive requirements, made to the airworthiness limitations (AWLs) related to fuel tank ignition prevention and the nitrogen generation system. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 191 (Wednesday, October 6, 2021)</title>
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[Federal Register Volume 86, Number 191 (Wednesday, October 6, 2021)]
[Proposed Rules]
[Pages 55538-55542]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-21787]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0664; Project Identifier AD-2021-00158-T]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain The Boeing Company Model 787-8, 787-9, and 787-10
airplanes. This proposed AD was prompted by significant changes,
including new or more restrictive requirements, made to the
airworthiness limitations (AWLs) related to fuel tank ignition
prevention and the nitrogen generation system. This proposed AD would
require revising the existing maintenance or inspection program, as
applicable, to incorporate new or more restrictive airworthiness
limitations. The FAA is proposing this AD to address the unsafe
condition on these products.
DATES: The FAA must receive comments on this proposed AD by November
22, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> 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 <a href="https://www.myboeingfleet.com">https://www.myboeingfleet.com</a>. 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.
[[Page 55539]]
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0664; or in person at
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket contains this NPRM, any comments
received, and other information. The street address for Docket
Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Tak Kobayashi, Aerospace Engineer,
Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des
Moines, WA; phone: 206-231-3553; email: <a href="/cdn-cgi/l/email-protection#c094a1aba1a8a9b3a1ee8bafa2a1b9a1b3a8a980a6a1a1eea7afb6"><span class="__cf_email__" data-cfemail="1c487d777d74756f7d3257737e7d657d6f74755c7a7d7d327b736a">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include ``Docket No. FAA-2021-0664; Project Identifier
AD-2021-00158-T'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any personal information you
provide. The agency will also post a report summarizing each
substantive verbal contact received about this NPRM.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to Tak
Kobayashi, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA; phone: 206-231-3553;
email: <a href="/cdn-cgi/l/email-protection#c397a2a8a2abaab0a2ed88aca1a2baa2b0abaa83a5a2a2eda4acb5"><span class="__cf_email__" data-cfemail="82d6e3e9e3eaebf1e3acc9ede0e3fbe3f1eaebc2e4e3e3ace5edf4">[email protected]</span></a>. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.
Background
The FAA has assessed the changes, including new or more restrictive
requirements, that have been made to the AWLs related to fuel tank
ignition prevention and the nitrogen generation system. The FAA is
issuing this AD to address ignition sources inside the fuel tanks and
increased flammability exposure of the fuel tanks caused by latent
failures, alterations, repairs, or maintenance actions, which could
result in a fuel tank explosion and consequent loss of an airplane.
The FAA issued AD 2018-11-13, Amendment 39-19301 (83 FR 25894, June
5, 2018) (AD 2018-11-13), which applies to certain The Boeing Company
Model 787-8 airplanes. AD 2018-11-13 requires, among other things,
revising the inspection or maintenance program to incorporate an AWL.
Since the FAA issued AD 2018-11-13, AWL No. 57-AWL-13, ``Inspection
Requirements for In-Tank Fasteners and Edge Seal near Disbond
Arrestment (DBA) Fastener Installations in Lightning Zone 2,'' has not
been revised, therefore, this proposed AD would require the
incorporation of AWL No. 57-AWL-13 that is also mandated by AD 2018-11-
13. Incorporating the revision required by this proposed AD would
terminate the requirements of paragraph (h) of AD 2018-11-13 for
certain Model 787-8 airplanes only.
Airworthiness Limitations Based on Type Design
When a type certificate is issued for a type design, the
Airworthiness Limitations section (ALS) of the Instructions for
Continued Airworthiness, including its revision level, is part of that
type design, as specified in 14 CFR 21.31(c). U.S. operators must
operate their airplanes in an airworthy condition, in accordance with
14 CFR 91.7(a). Included in this obligation is the requirement to
perform any maintenance or inspections specified in the ALS, and in
accordance with the ALS as specified in 14 CFR 43.16 and 91.403(c),
unless an alternative has been approved by the FAA.
The sum effect of these requirements is an obligation to comply
with the ALS revision defined in the type design referenced in the
manufacturer's conformity statement. Therefore, operators are required
to maintain each airplane in accordance with the ALS revision that has
been approved as part of the type design for that airplane. Operators
are allowed to step up and comply with a ``later'' ALS revision
published after the ``type design'' ALS revision. However, compliance
with a later ALS revision is not a mandatory requirement.
This proposed AD applies to certain Model 787 airplanes. For those
affected airplanes, this proposed AD would require revising the
maintenance or inspection program by incorporating the information
specified in the August 2018 revision of the Model 787 ALS and thereby,
would mandate the ALS revision in the proposed AD.
FAA's Determination
The FAA is issuing this NPRM after determining that the unsafe
condition described previously is likely to exist or develop on other
products of the same type design.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Boeing 787 Special Compliance Items/Airworthiness
Limitations, D011Z009-03-04, dated August 2018. This service
information specifies AWLs that include airworthiness limitation
instructions (ALIs) and critical design configuration control
limitations (CDCCLs) related to fuel tank ignition prevention and the
nitrogen generation system.
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 ADDRESSES.
Proposed AD Requirements in This NPRM
This proposed AD would require revising the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive AWLs.
This proposed AD would also require revisions to certain operator
maintenance documents to include new actions (e.g., inspections) and
CDCCLs. Compliance with these actions is required by 14 CFR 91.403(c).
For airplanes that have been previously modified, altered, or repaired
in the areas addressed by this proposed AD, the operator may not be
able to accomplish the actions described in the revisions. In this
situation, to comply with 14 CFR 91.403(c), the operator must request
approval for an alternative
[[Page 55540]]
method of compliance according to paragraph (j) of this proposed AD.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 121 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
The FAA has determined that revising the existing maintenance or
inspection program takes an average of 90 work-hours per operator,
although the agency recognizes that this number may vary from operator
to operator. Since operators incorporate maintenance or inspection
program changes for their affected fleet(s), the FAA has determined
that a per-operator estimate is more accurate than a per-airplane
estimate. Therefore, the FAA estimates the average total cost per
operator to be $7,650 (90 work-hours x $85 per work-hour).
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
The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Would not affect intrastate aviation in Alaska, and
(3) Would 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:
The Boeing Company: Docket No. FAA-2021-0664; Project Identifier AD-
2021-00158-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by November 22, 2021.
(b) Affected ADs
This AD affects AD 2018-11-13, Amendment 39-19301 (83 FR 25894,
June 5, 2018) (AD 2018-11-13).
(c) Applicability
This AD applies to The Boeing Company Model 787-8, 787-9, and
787-10 airplanes, certificated in any category, having line numbers
(L/Ns) 1 through 871 inclusive, excluding L/N 688; and L/Ns 873,
875, 877, 878, 879, 881, and 883.
(d) Subject
Air Transport Association (ATA) of America Code 28, Fuel.
(e) Unsafe Condition
This AD was prompted by significant changes, including new and
more restrictive requirements, made to the airworthiness limitations
(AWLs) related to fuel tank ignition prevention and the nitrogen
generation system. The FAA is issuing this AD to address ignition
sources inside the fuel tanks and increased flammability exposure of
the fuel tanks caused by latent failures, alterations, repairs, or
maintenance actions, which could result in a fuel tank explosion and
consequent loss of an airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Maintenance or Inspection Program Revision
Within 180 days after the effective date of this AD, revise the
existing maintenance or inspection program, as applicable, to
incorporate the information specified in Sections C through F of
Boeing 787 Special Compliance Items/Airworthiness Limitations,
D011Z009-03-04, dated August 2018. The initial compliance time for
doing the airworthiness limitation instruction (ALI) tasks is at the
times specified in paragraphs (g)(1) through (14) of this AD.
(1) For airworthiness limitation (AWL) No. 28-AWL-89, ``Fuel
Quantity Data Concentrator (FQDC) Bracket Inspections,'' at the
applicable time in paragraph (g)(1)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 28-AWL-89: Within 5 years or 10,000 flight
cycles, whichever occur first after the most recent inspection was
performed as specified in AWL No. 28-AWL-89.
(ii) For airplanes on which no initial inspection was performed:
Within 5 years or 10,000 flight cycles, whichever occurs first after
the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(2) For AWL No. 57-AWL-01, ``Edge and Fillet Seals at Stringer
and Spar Locations (Zone 2),'' at the applicable time in paragraph
(g)(2)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-01: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-01.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(3) For AWL No. 57-AWL-02, ``Fasteners on Bare Carbon Fiber
Reinforced Plastic (CFRP) Stripes,'' at the applicable time in
paragraph (g)(3)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-02: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-02.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(4) For AWL No. 57-AWL-03, ``Head-in-tank Thin-Sleeved
Interference-Fit Fasteners with Heads in the Fuel Tank'' at the
applicable time in paragraph (g)(4)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-03: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-03.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original
[[Page 55541]]
standard airworthiness certificate or the date of issuance of the
original export certificate of airworthiness.
(5) For AWL No. 57-AWL-05, ``Titanium Collars--BACC30CT
Fasteners (Clearance Fit).'' at the applicable time in paragraph
(g)(5)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-05: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-05.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(6) For AWL No. 57-AWL-06, ``Titanium Collars--BACC30CY Collars
(Interference-Fit with Swaged Collars)'' at the applicable time in
paragraph (g)(6)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-06: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-06.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(7) For AWL No. 57-AWL-07, ``Tension-rated Bolt Locations at
Side of Body (SOB) and Nacelle Fittings'' at the applicable time in
paragraph (g)(7)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-07: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-07.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(8) For AWL No. 57-AWL-08, ``Dielectric Top on Wing Surface,''
at the applicable time in paragraph (g)(8)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-08: Within 6 years or 12,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-08.
(ii) For airplanes on which no initial inspection was performed:
Within 6 years or 12,000 flight cycles, whichever occurs first after
the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(9) For AWL No. 57-AWL-09, ``Inspection Requirements for Class
1A Seal Installations created as a result of Boeing Material Review
Board,'' at the applicable time in paragraph (g)(9)(i) or (ii) of
this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-09: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-09.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(10) For AWL No. 57-AWL-10, ``Inspection Requirements for In-
Tank Fasteners near Side of Body (SOB) Rib and between Ribs 7 and
18,'' at the applicable time in paragraph (g)(10)(i) or (ii) of this
AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-10: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-10.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(11) For AWL No. 57-AWL-13, ``Inspection Requirements for In-
Tank Fasteners and Edge Seal near Disbond Arrestment (DBA) Fastener
Installations in Lightning Zone 2,'' at the applicable time in
paragraph (g)(11)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-13: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-13.
(ii) For airplanes on which no initial inspection was performed:
At the applicable time in paragraph (g)(11)(ii)(A) or (B) of this
AD.
(A) For airplanes on which Boeing Service Bulletin B787-81205-
SB570030-00 is applicable: Within 12 years or 24,000 flight cycles,
whichever occurs first after the incorporation of Boeing Service
Bulletin B787-81205-SB570030-00.
(B) For airplanes on which Boeing Service Bulletin B787-81205-
SB570030-00 is not applicable: Within 12 years or 24,000 flight
cycles, whichever occurs first after the date of issuance of the
original standard airworthiness certificate or the date of issuance
of the original export certificate of airworthiness.
(12) For AWL No. 57-AWL-14, ``Supplemental Inspection
Requirements for Pre-cured Sealant Caps, Fillet Seals, and Edge
Seals associated Stringer Splice Fitting Installation located at
Right Wing Upper Panel Stringer No.3, just Outboard of the Side of
Body Rib,'' at the applicable time in paragraph (g)(12)(i) or (ii)
of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-14: Within 12 years or 24,000 flight
cycles whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-14.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(13) For AWL No. 57-AWL-15, ``Inspection Requirements for Pre-
cured Sealant Caps, Injection Seals, Fillet Seals, and Edge Seals
associated with the Wing Lower Panel Stringer Attachments to the
Lower Side of Body (SOB) Chord,'' at the applicable time in
paragraph (g)(13)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-15: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-15.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(14) For AWL No. 57-AWL-16, ``Supplemental Inspection
Requirements for Edge Seals located at Left Wing Upper Panel
Stringer No. 19, Between Ribs 8 and 9,'' at the applicable time in
paragraph (g)(14)(i) or (ii) of this AD.
(i) For airplanes on which an inspection was performed as
specified in AWL No. 57-AWL-16: Within 12 years or 24,000 flight
cycles, whichever occurs first after the most recent inspection was
performed as specified in AWL No. 57-AWL-16.
(ii) For airplanes on which no initial inspection was performed:
Within 12 years or 24,000 flight cycles, whichever occurs first
after the date of issuance of the original standard airworthiness
certificate or the date of issuance of the original export
certificate of airworthiness.
(h) No Alternative Actions, Intervals, or CDCCLs
After the existing maintenance or inspection program has been
revised as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections), intervals, or CDCCLs may be used unless
the actions, intervals, and CDCCLs are approved as an alternative
method of compliance (AMOC) in accordance with the procedures
specified in paragraph (j) of this AD.
(i) Terminating Actions
Accomplishment of the revision required by paragraph (g) of this
AD terminates the requirements specified in paragraph (h) of AD
2018-11-13, for Model 787-8 airplanes only.
(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 responsible Flight Standards Office,
as appropriate. If sending information directly to the manager of
the certification office, send it to the attention of the person
identified in Related Information.
[[Page 55542]]
Information may be emailed to: <a href="/cdn-cgi/l/email-protection#a39a8ee2edee8ef0c6c2d7d7cfc68ee2e0ec8ee2eeece08ef1c6d2d6c6d0d7d0e3c5c2c28dc4ccd5"><span class="__cf_email__" data-cfemail="487165090605651b2d293c3c242d65090b07650905070b651a2d393d2d3b3c3b082e2929662f273e">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards 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
(1) For more information about this AD, contact Tak Kobayashi,
Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch,
2200 South 216th St., Des Moines, WA; phone: 206-231-3553; email:
<a href="/cdn-cgi/l/email-protection#e5b1848e848d8c9684cbae8a87849c84968d8ca5838484cb828a93"><span class="__cf_email__" data-cfemail="fca89d979d94958f9dd2b7939e9d859d8f9495bc9a9d9dd29b938a">[email protected]</span></a>.
(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 <a href="https://www.myboeingfleet.com">https://www.myboeingfleet.com</a>. You may view this referenced 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.
Issued on August 7, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021-21787 Filed 10-5-21; 8:45 am]
BILLING CODE 4910-13-P
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</html>Indexed from Federal Register on October 6, 2021.
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