Rule2026-08306
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
April 29, 2026
Effective
June 3, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is superseding Airworthiness Directive (AD) 2023-08- 04, which applied to certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. AD 2023-08-04 required a detailed visual inspection of all door 1 and door 3 lavatory and galley potable water systems for any missing or incorrectly installed clamshell couplings, and applicable on-condition actions. This AD was prompted by discoveries by Boeing that some couplings did not have the required safety strap and that they have developed a design solution that replaces the couplings with couplings that have safety straps. This AD retains the requirements of AD 2023-08-04 and requires, for certain airplanes, a detailed inspection of all clamshell couplings for the presence and correct installation of safety straps at door 1 and door 3 lavatories and galleys with a potable water system and applicable on-condition actions, which would terminate the existing requirements. This AD also prohibits the installation of affected parts at inspection locations. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 91 Issue 82 (Wednesday, April 29, 2026)</title>
</head>
<body><pre>
[Federal Register Volume 91, Number 82 (Wednesday, April 29, 2026)]
[Rules and Regulations]
[Pages 23005-23008]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-08306]
[[Page 23005]]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-1114; Project Identifier AD-2025-00314-T;
Amendment 39-23321; AD 2026-09-01]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2023-08-
04, which applied to certain The Boeing Company Model 787-8, 787-9, and
787-10 airplanes. AD 2023-08-04 required a detailed visual inspection
of all door 1 and door 3 lavatory and galley potable water systems for
any missing or incorrectly installed clamshell couplings, and
applicable on-condition actions. This AD was prompted by discoveries by
Boeing that some couplings did not have the required safety strap and
that they have developed a design solution that replaces the couplings
with couplings that have safety straps. This AD retains the
requirements of AD 2023-08-04 and requires, for certain airplanes, a
detailed inspection of all clamshell couplings for the presence and
correct installation of safety straps at door 1 and door 3 lavatories
and galleys with a potable water system and applicable on-condition
actions, which would terminate the existing requirements. This AD also
prohibits the installation of affected parts at inspection locations.
The FAA is issuing this AD to address the unsafe condition on these
products.
DATES: This AD is effective June 3, 2026.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of June 3,
2026.
The Director of the Federal Register approved the incorporation by
reference of a certain other publication listed in this AD as of June
29, 2023 (88 FR 33823, May 25, 2023).
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-1114; 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.
Material Incorporated by Reference:
<bullet> For Boeing material 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; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
<bullet> You may view this material 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 at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-1114.
FOR FURTHER INFORMATION CONTACT: Joshua Baek, Aviation Safety Engineer,
FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 562-627-6725;
email: <a href="/cdn-cgi/l/email-protection#5832372b302d397621763a393d33183e3939763f372e"><span class="__cf_email__" data-cfemail="0963667a617c682770276b686c62496f6868276e667f">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2023-08-04, Amendment 39-22419 (88 FR
33823, May 25, 2023) (AD 2023-08-04). AD 2023-08-04 applied to certain
The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. The NPRM
was published in the Federal Register on July 3, 2025 (90 FR 29512).
The NPRM was prompted by reports of a loss of water pressure during
flight and water leaks that affected multiple pieces of electronic
equipment. In the NPRM, the FAA proposed to continue to retain the
requirements of AD 2023-08-04 and require, for certain airplanes, a
detailed inspection of all clamshell couplings for the presence and
correct installation of safety straps at door 1 and door 3 lavatories
and galleys with a potable water system and applicable on-condition
actions, which would terminate the existing requirements. Additionally,
Model 787-10 airplanes were included in the applicability of the NPRM
to prevent the installation of affected parts on Model 787-10 airplanes
as required by the Parts Installation Prohibition paragraph of this AD.
The FAA is issuing this AD to prevent the unsafe condition, which, if
not addressed, could lead to water leaks and water migration to
critical flight equipment, which may affect the continued safe flight
and landing of the airplane.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from the Air Line Pilots Association,
International (ALPA), and United Airlines who supported the NPRM
without change.
The FAA received additional comments from Boeing, Turkish Airlines
(THY), Kenya Airlines, an individual commenter, and The Foundation for
Aviation Safety. The following presents the comments received on the
NPRM and the FAA's response to each comment.
Request for Clarification on Applicability
Boeing requested clarification on why Model 787-10 airplanes were
included in the applicability of the proposed AD. Boeing stated that
the Background section of the proposed AD includes Model 787-10
airplanes, although the applicability of Boeing Alert Requirements
Bulletin B787-81205-SB250299-00 RB, Issue 002, dated February 28, 2025,
is limited to the Model 787-8 and 787-9 airplanes. Boeing noted that
revising the Background section to explain that Model 787-10 airplanes
were included because of the Parts Installation Prohibition paragraph
would avoid confusion.
The FAA agrees to clarify. This AD retains the requirements of
paragraph (g) of AD 2023-08-04, which incorporates by reference (IBR)
Boeing Alert Requirements Bulletin B787-81205-SB380021-00 RB, Issue
001, dated August 12, 2022, which applies to Boeing Model 787-8, 787-9,
and 787-10 airplanes. In addition, some Model 787-10 airplanes may not
have been inspected as required by AD 2023-08-04; therefore, the Parts
Installation Prohibition paragraph in this AD also applies to Model
787-10 airplanes. For these reasons, the Background section of this AD
has been revised to clarify that Model 787-10 airplanes are included
because of the Parts Installation Prohibition requirement of this AD.
Request To Revise Listed Part Numbers
Turkish Airlines requested the FAA revise the Parts Installation
Prohibition paragraph in the proposed AD that prohibits installation of
(P/N) 14C02-08C or P/N AS1655A08. Turkish Airlines explained that P/N
AS1655A08 is listed in THY illustrated parts data (IPD) 38-10-01-10 as
the specification number for P/N 14C02-08A, and therefore it would be
applicable to all THY Model 787 airplanes.
[[Page 23006]]
The FAA agrees and has revised the Parts Installation Prohibition
paragraph in this AD to identify these part numbers as ``P/N 14C02-08C
(AS1655C08)'' and ``P/N 14C02-08A (AS1655A08)''.
Request for Clarification on Applicability and Parts Installation
Prohibition Requirements
Turkish Airlines requested clarification on whether the replacement
required by the Parts Installation Prohibition paragraph in the
proposed AD would apply to its fleet, given that Boeing Alert
Requirements Bulletin B787-81205-SB250299-00 RB, Issue 002, dated
February 28, 2025, is not applicable to Turkish Airlines. Turkish
Airlines also requested clarification on whether it would be required
to perform any actions specified in the Parts Installation Prohibition
paragraph for airplanes that are not included in the Effectivity of
Boeing Alert Requirements Bulletin B787-81205-SB250299-00 RB, Issue
002, dated February 28, 2025.
The FAA provides the following clarification. The Parts
Installation Prohibition paragraph does not describe an action; rather,
it prohibits installation of affected part numbers in locations where
they have been replaced with approved part numbers. The Parts
Installation Prohibition paragraph applies to all airplanes identified
in the Applicability paragraph of this AD. Therefore, the Parts
Installation Prohibition paragraph of this AD applies to any Turkish
Airlines airplanes included in the Applicability paragraph of this AD,
even if those airplanes are not listed in the Effectivity of Boeing
Alert Requirements Bulletin B787-81205-SB250299-00 RB, Issue 002, dated
February 28, 2025.
Request for Credit for Previous Actions
Kenya Airways requested the FAA include an additional paragraph in
the NPRM to provide credit for the actions required by the New Required
Actions paragraph if those actions were performed before the effective
date of this AD using Boeing Alert Service Bulletin B787-81205-
SB250299-00 RB, Issue 001, dated July 31, 2023. Kenya stated that it
has accomplished Boeing Alert Service Bulletin B787-81205-SB250299-00
RB, Issue 001, dated July 31, 2023, on some of its airplanes, and
therefore requested credit for those completed actions.
The FAA disagrees with the request. Boeing Alert Requirements
Bulletin B787-81205-SB250299-00 RB, Issue 001, dated July 31, 2023,
omits certain inspection locations. As a result, Boeing Alert
Requirements Bulletin B787-81205-SB250299-00 RB, Issue 001, dated July
31, 2023, does not fully address the unsafe condition, and therefore
cannot be credited. No changes have been made to this AD in this
regard.
Request To Clarify the Parts Installation Prohibition Paragraph
An individual commenter requested the FAA confirm the correct part
number referenced as ``P/N 14C33-08'' in paragraph (m) of the proposed
AD. The commenter noted that the listed part number is inconsistent
with Boeing documentation and industry parts catalogs, which list ``P/N
14C34-08C''. The commenter also requested clarification that the parts
installation prohibition applies only to new installations and that
properly installed units may remain in service until the next scheduled
replacement. The commenter stated that paragraph (m) prohibits
installation of P/N 14C02-08C and P/N AS1655A08 at affected locations
but does not distinguish between existing and new installations.
The FAA provides the following clarification. The Parts
Installation Prohibition paragraph in this AD has been revised as
described previously. Both P/N 14C34-08C and P/N 14C33-08 are valid
replacement parts; therefore, P/N 14C02-08C (AS1655C08) or P/N 14C02-
08A (AS1655A08) may be replaced with either P/N 14C34-08C or P/N 14C33-
08. Additionally, paragraph (m) of this AD specifies that the
prohibited part numbers cannot be installed in locations where they
have been replaced with valid part numbers, indicating that the parts
installation prohibition only applies to new installations where the
affected parts have already been replaced with P/N 14C34-08C or P/N
14C33-08.
Request To Define Inspection Locations
An individual commenter requested the FAA define the term
``inspection locations'' as the clamshell coupling points at door 1 and
door 3 lavatories and galleys and include a note or diagram to that
effect. The commenter stated that the term was not defined in the
regulatory text of the proposed AD and could be misconstrued to include
all potable-water system fittings.
The FAA disagrees with the request. The inspection locations are
defined in Table 5 of Boeing Alert Requirements Bulletin B787-81205-
SB250299-00 RB, Issue 002, dated February 28, 2025. Table 5 instructs
operators to ``Do a Detailed Inspection (DET) of all clamshell
couplings at Door 1 and Door 3 lavatories and galleys with potable
water system for a safety strap and that clamshell coupling with a
safety strap is correctly installed.'' Therefore, the inspection
locations are already defined in the referenced service information. No
changes have been made to this AD in this regard.
Request To Consolidate Cross-Referenced Documents
An individual commenter requested the FAA provide a consolidated
compliance table within the regulatory text or as a standalone matrix
in the proposed AD. The commenter stated that the proposed AD
incorporated six separate service documents with distinct information
that could be technically misinterpreted.
The FAA disagrees that the quantity of service documents referenced
in this AD will lead to technical misinterpretation. The issue dates of
each referenced service document are identified in this AD. The FAA has
determined that the current structure of this AD provides the most
accurate and enforceable method for identifying the required actions.
No changes have been made to this AD in this regard.
Request for Broader Action To Address Water Intrusion Issues
The FAA received a comment from the Foundation for Aviation Safety
asking how many additional water intrusion issues might occur as the
airplane ages and what the FAA is doing to ensure that Boeing maintains
manufacturing quality to prevent leaks. The Foundation for Aviation
Safety also suggested that all affected airplanes be inspected and
undergo leak detection testing rather than waiting for electrical or
electronic failures.
The FAA acknowledges the commenter's concerns. However, the
questions and suggestions provided are general in nature and are not
specific to the unsafe condition addressed in this AD. Broader concerns
regarding potential future water intrusion issues and fleetwide leak
detection testing are outside the scope of this AD. Therefore, no
changes have been made to this AD in this regard.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting this AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. Except for minor editorial changes, this
AD is adopted as proposed in the NPRM. None of the changes will
increase the economic burden on any operator.
[[Page 23007]]
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin B787-81205-
SB250299-00 RB, Issue 002, dated February 28, 2025. This material
specifies procedures for a detailed inspection for the presence and
correct installation of safety straps at the clamshell couplings at
door 1 and door 3 lavatories and galleys with a potable water system.
The material also specifies applicable on-condition actions including
correcting the installation of the safety strap, replacing any
clamshell coupling that does not have a strap with a new clamshell
coupling that has a safety strap, and performing a water leak test.
This AD also requires Boeing Alert Requirements Bulletin B787-
81205-SB380021-00 RB, Issue 001, dated August 12, 2022, which the
Director of the Federal Register approved for incorporation by
reference as of June 29, 2023 (88 FR 33823, May 25, 2023).
This material 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 165 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Clamshell coupling inspection, 1 work-hour x $85 $0 $85................. $14,025.
per lavatory/galley (retained per hour = $85.
actions from AD 2023-08-04).
Safety strap inspection, per 27 work-hours x $85 0 $2,295 per lavatory/ $238,680
lavatory/galley (new action) per hour = $2,295, galley. (104 airplanes).
(For 787-8 and -9 airplanes). per lavatory/galley.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any on-condition
actions that would be required based on the results of the inspections.
The agency has no way of determining the number of aircraft that might
need these actions:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Correct installation for clamshell 1 work-hour x $85 per $0..................... $85 per lavatory/
coupling with safety strap that was hour = $85 per galley.
installed incorrectly. lavatory/galley.
Install clamshell coupling with strap 4 work-hours x $85 per Up to $267 per lavatory/ $607 per lavatory/
and perform leak test. hour = $340 per galley. galley.
lavatory/galley.
----------------------------------------------------------------------------------------------------------------
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.
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:
0
a. Removing Airworthiness Directive (AD) 2023-08-04, Amendment 39-22419
(88 FR 33823, May 25, 2023); and
0
b. Adding the following new AD:
2026-09-01 The Boeing Company: Amendment 39-23321; Docket No. FAA-
2025-1114; Project Identifier AD-2025-00314-T.
(a) Effective Date
This airworthiness directive (AD) is effective June 3, 2026.
(b) Affected ADs
This AD replaces AD 2023-08-04, Amendment 39-22419 (88 FR 33823,
May 25, 2023) (AD 2023-08-04).
(c) Applicability
This AD applies to The Boeing Company Model 787-8, 787-9, and
787-10 airplanes, certificated in any category, as specified in
Boeing Alert Requirements Bulletin B787-81205-SB380021-00 RB, Issue
001, dated August 12, 2022.
(d) Subject
Air Transport Association (ATA) of America Code 38, Water/waste.
(e) Unsafe Condition
This AD was prompted by reports of a loss of water pressure
during flight and water leaks that affected multiple pieces of
[[Page 23008]]
electronic equipment, and by the determination that some clamshell
couplings for certain lavatory and galley doors did not have a
required safety strap. The FAA is issuing this AD to prevent the
unsafe condition, which, if not addressed, could lead to water leaks
and water migration to critical flight equipment, which may affect
the continued safe flight and landing of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Clamshell Coupling Inspection, With No Changes
This paragraph restates the requirements of paragraph (g) of AD
2023-08-04, with no changes. Except as specified by paragraph (h) of
this AD: At the applicable times specified in the ``Compliance''
paragraph of Boeing Alert Requirements Bulletin B787-81205-SB380021-
00 RB, Issue 001, dated August 12, 2022, do all applicable actions
identified in, and in accordance with, the Accomplishment
Instructions of Boeing Alert Requirements Bulletin B787-81205-
SB380021-00 RB, Issue 001, dated August 12, 2022.
Note 1 to paragraph (g): Guidance for accomplishing the actions
required by paragraph (g) of this AD can be found in Boeing Alert
Service Bulletin B787-81205-SB380021-00, Issue 001, dated August 12,
2022, which is referred to in Boeing Alert Requirements Bulletin
B787-81205-SB380021-00 RB, Issue 001, dated August 12, 2022.
(h) Retained Exception to Service Information Specifications, With No
Changes
This paragraph restates the exception of paragraph (h) of AD
2023-08-04, with no changes. Where the Compliance Time columns of
the table in the ``Compliance'' paragraph of Boeing Alert
Requirements Bulletin B787-81205-SB380021-00 RB, Issue 001, dated
August 12, 2022, refer to the Issue 001 date of Requirements
Bulletin B787-81205-SB380021-00 RB, this AD requires using June 29,
2023 (the effective date of AD 2023-08-04).
(i) Retained Credit for Previous Actions, With No Changes
This paragraph restates the provisions of paragraph (i) of AD
2023-08-04, with no changes. This paragraph provides credit for the
actions specified in paragraph (g) of this AD, if those actions were
performed before June 29, 2023 (the effective date of AD 2023-08-
04), using Multi Operator Message MOM-MOM-21-0554-01B, dated
December 14, 2021 (for lavatory inspections); and MOM-MOM-22-0229-
01B, dated April 29, 2022 (for galley inspections).
(j) New Required Actions
For airplanes identified in Boeing Alert Requirements Bulletin
B787-81205-SB250299-00 RB, Issue 002, dated February 28, 2025:
Except as specified by paragraph (k) of this AD, at the applicable
times specified in the ``Compliance'' paragraph of Boeing Alert
Requirements Bulletin B787-81205-SB250299-00 RB, Issue 002, dated
February 28, 2025, do all applicable actions identified in, and in
accordance with, the Accomplishment Instructions of Boeing Alert
Requirements Bulletin B787-81205-SB250299-00 RB, Issue 002, dated
February 28, 2025.
Note 2 to paragraph (j): Guidance for accomplishing the actions
required by paragraph (j) of this AD can be found in Boeing Alert
Service Bulletin B787-81205-SB250299-00, Issue 002, dated February
28, 2025, which is referred to in Boeing Alert Requirements Bulletin
B787-81205-SB250299-00 RB, Issue 002, dated February 28, 2025.
(k) New Exception to Service Information Specifications
Where the Compliance Time column of the table in the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin B787-
81205-SB250299-00 RB, Issue 002, dated February 28, 2025, uses the
phrase ``the Issue 001 date of Requirements Bulletin B787-81205-
SB250299-00 RB,'' this AD requires using the effective date of this
AD.
(l) Terminating Action for Clamshell Coupling Inspection
For the airplanes identified in Boeing Alert Requirements
Bulletin B787-81205-SB250299-00 RB, Issue 002, dated February 28,
2025: Accomplishment of the actions required by paragraph (j) of
this AD terminates the requirements of paragraph (g) of this AD.
(m) Parts Installation Prohibition
As of the effective date of this AD, no person may install a
clamshell coupling, part number (P/N) 14C02-08C (AS1655C08) or P/N
14C02-08A (AS1655A08), at inspection locations where P/N 14C02-08C
(AS1655C08) or P/N 14C02-08A (AS1655A08) was replaced with P/N
14C34-08C or P/N 14C33-08 on any airplane.
(n) Alternative Methods of Compliance (AMOCs)
(1) The Manager, AIR-520, Continued Operational Safety 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 Continued Operational
Safety Branch, send it to the attention of the person identified in
paragraph (o)(1) of this AD. Information may be emailed to:
<a href="/cdn-cgi/l/email-protection#1e5f53515d5e787f7f30797168"><span class="__cf_email__" data-cfemail="4405090b07042225256a232b32">[email protected]</span></a>. Before using any approved AMOC, notify your
appropriate principal inspector, or lacking a principal inspector,
the manager of the responsible Flight Standards Office.
(2) 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, AIR-
520, Continued Operational Safety 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.
(o) Additional Information
(1) For more information about this AD, contact Joshua Baek,
Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA
98198; phone: 562-627-6725; email: <a href="/cdn-cgi/l/email-protection#0a606579627f6b247324686b6f614a6c6b6b246d657c"><span class="__cf_email__" data-cfemail="8de7e2fee5f8eca3f4a3efece8e6cdebececa3eae2fb">[email protected]</span></a>.
(2) Material identified in this AD that is not incorporated by
reference is available at the address specified in paragraph (p)(5)
of this AD.
(p) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the material listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless this AD specifies otherwise.
(3) The following material was approved for IBR on June 3, 2026.
(i) Boeing Alert Requirements Bulletin B787-81205-SB250299-00
RB, Issue 002, dated February 28, 2025.
(ii) [Reserved]
(4) The following material was approved for IBR on June 29, 2023
(88 FR 33823, May 25, 2023).
(i) Boeing Alert Requirements Bulletin B787-81205-SB380021-00
RB, Issue 001, dated August 12, 2022.
(ii) [Reserved]
(5) For Boeing material 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; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
(6) You may view this material 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.
(7) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a> or email <a href="/cdn-cgi/l/email-protection#2a4c58044344595a4f495e4345446a444b584b044d455c"><span class="__cf_email__" data-cfemail="187e6a3671766b687d7b6c7177765876796a79367f776e">[email protected]</span></a>.
Issued on April 21, 2026.
Victor Wicklund,
Acting Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2026-08306 Filed 4-28-26; 8:45 am]
BILLING CODE 4910-13-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on April 29, 2026.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.