[Federal Register Volume 90, Number 178 (Wednesday, September 17, 2025)]
[Rules and Regulations]
[Pages 44763-44767]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-17984]
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Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 90, No. 178 / Wednesday, September 17, 2025 /
Rules and Regulations
[[Page 44763]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-2398; Project Identifier AD-2023-00423-T;
Amendment 39-23129; AD 2025-18-02]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This AD
was prompted by a report indicating that the oxygen supply tubing can
become kinked when certain passenger service unit (PSU) oxygen panel
assemblies are installed in the forward-most position of a center stow
bin. This AD requires a one-time inspection of the affected PSU oxygen
panel assemblies and applicable on-condition actions. This AD also
prohibits the installation of affected parts. The FAA is issuing this
AD to address the unsafe condition on these products.
DATES: This AD is effective October 22, 2025.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of October 22,
2025.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2023-2398; 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:
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 myboeingfleet.com.
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 regulations.gov under
Docket No. FAA-2023-2398.
FOR FURTHER INFORMATION CONTACT: Joshua Baek, Aviation Safety Engineer,
FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 562-627-6725;
email: [email protected].
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all The Boeing Company
Model 787-8, 787-9, and 787-10 airplanes. The NPRM was published in the
Federal Register on December 22, 2023 (88 FR 88544). The NPRM was
prompted by a report indicating that the oxygen supply tubing can
become kinked when certain PSU oxygen panel assemblies are installed in
the forward-most position of a center stow bin. In the NPRM, the FAA
proposed to require a one-time inspection of the affected PSU oxygen
panel assemblies and applicable on-condition actions. In the NPRM, the
FAA also proposed to prohibit the installation of affected parts. The
FAA is issuing this AD to address the incorrect installation of the
oxygen supply tubing in the PSU oxygen panel assemblies.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from The Boeing Company (Boeing),
American Airlines (American), All Nippon Airways (All Nippon), and
United Airlines (United). The following presents the comments received
on the NPRM and the FAA's response to each comment.
Request To Clarify the NPRM Background
Boeing requested the FAA revise the second sentence of the
Background paragraph of the NPRM to clarify that the PSU reverse bottle
oxygen panel assembly drawing restructure introduced a conflict between
the lower- and upper-level assembly drawings for center-installed panel
assemblies only, and that PSU reverse bottle oxygen panel assembly
drawings for outboard-installed panel assemblies were not impacted.
Boeing stated that, following the drawing restructure, only the center-
installed PSU reverse bottle oxygen panel assemblies had the lower-
level assembly drawings with incorrect routing definition.
Boeing also requested the FAA revise the third sentence of the
Background paragraph of the NPRM to clarify that, after the drawing
restructure, the upper-level assembly drawings had maintained the
correct routing design intent. Boeing stated that the upper-level
assembly drawings had the correct routing design intent before and
after the drawing restructure, and that the upper-level assembly
drawings were not impacted.
The FAA partially agrees. The FAA agrees with Boeing's
clarifications of the background information. However, the FAA has not
revised the AD because that information is not restated in the
Background paragraph of this AD.
Request To Extend the Compliance Time
American requested that the FAA extend the compliance time to 48
months. All Nippon and United requested it be extended to 36 months.
American and All Nippon stated that a 24-month compliance time would
require operators to schedule special maintenance visits and possibly
require airplanes to be out of service, and United stated it would be
burdensome to operators. American, All Nippon, and United also stated
that extending the compliance time would allow operators to accomplish
the AD requirements during scheduled C-checks, which would have the
least impact on operators. United stated that providing an extra 24
months to comply with the AD will not significantly decrease the level
of safety.
The FAA agrees to extend the compliance time to 36 months and has
[[Page 44764]]
revised paragraphs (h)(1), (2), and (3) of this AD accordingly.
The FAA does not agree to extend the compliance time to 48 months.
In developing an appropriate compliance time for this action, the FAA
considered the recommendations of the manufacturer, the urgency
associated with the unsafe condition, the availability of required
parts, and the practical aspect of accomplishing the required actions
within a period of time that corresponds to normal scheduled
maintenance for most affected operators. In consideration of these
items, the FAA has determined that a 36-month compliance time will
ensure an acceptable level of safety. Extending the compliance time
will allow operators to work within existing maintenance schedules and
act as soon as reasonably practical. However, under the provisions of
paragraph (k) 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.
Request To Refer to Later Revision of Boeing Service Information
Boeing requested that the FAA revise the proposed AD to reference
Issue 002 of Boeing Alert Requirements Bulletins B787-81205-SB250277-00
RB and B787-81205-SB250278-00 RB instead of Issue 001. Boeing stated it
will be releasing Issue 002 of those service bulletins no later than
July 12, 2024, in order to reference Revision 2 of Collins Aerospace
Service Bulletins 4572105-25-001, 4572175-25-001, and 4572185-25-001.
The FAA does not agree with the request. Issue 002 of the Boeing
requirements bulletins have not been issued, and the publication date
is yet to be determined. To delay this action until the revised service
information is published would be inappropriate since the FAA has
determined that an unsafe condition exists and actions must be
conducted to ensure continued safety. Operators may apply for approval
to use later revisions as an alternative method of compliance (AMOC)
with this AD under the provisions of paragraph (k) of this AD. The FAA
has not changed this AD in this regard.
Request To Refer to Later Revisions of Collins Aerospace Service
Information
American, All Nippon, and United requested that Boeing Alert
Requirements Bulletins B787-81205-SB250277-00 RB and B787-81205-
SB250278-00 RB, both Issue 001, both dated February 15, 2023, be
revised to reference Collins Aerospace Service Bulletins 4572105-25-
001, 4572175-25-001, and 4572185-25-001, all Revision 2, all dated
November 6, 2023.
The FAA acknowledges the commenters' concern. The FAA notes that,
among various actions, Issue 001 of the Boeing requirements bulletins
specifies to replace the oxygen supply tubing if certain damage is
found, using instructions in Revision 1 of the Collins Aerospace
service bulletins. The FAA has reviewed Revision 2 of the Collins
Aerospace service bulletins and found that the instructions for this
replacement have been removed from the service bulletins. In addition,
the FAA has found that certain paragraphs in Revision 2 of the Collins
Aerospace service bulletins have been reidentified, which has resulted
in paragraph misalignment between actions specified in Issue 001 of the
Boeing requirements bulletins and Revision 2 of the Collins Aerospace
service bulletins. The FAA has therefore determined that the
differences between Revision 1 and Revision 2 of the Collins Aerospace
service bulletins make it impractical to include an exception in this
AD that would allow use of Revision 2 of the Collins Aerospace service
bulletins in conjunction with Issue 001 of the Boeing requirements
bulletins. As discussed in the previous comment, the FAA has determined
that it would be inappropriate to delay this action until the Boeing
requirements bulletins are revised to reference Revision 2 of the
Collins Aerospace service bulletins. However, under the provisions of
paragraph (k) of this AD, operators may apply for approval to use
Revision 2 of the Collins Aerospace service bulletins as an AMOC to
this AD provided the discrepancies described above are addressed. The
FAA has not changed this AD in this regard.
Request To Refer to Additional Component Maintenance Manuals (CMMs)
American requested that Boeing Alert Requirements Bulletins B787-
81205-SB250277-00 and B787-81205-SB250278-00, both Issue 001, both
dated February 15, 2023, be revised to reference Collins Aerospace CMMs
25-23-62 and 25-23-63. American noted that the Boeing service bulletins
reference CMM 25-23-60 for PSU oxygen panel assembly part number (P/N)
4572105-XXX-0D0 but are missing references to CMM 25-23-62 for P/N
4572175-XXX-0D0 and CMM 25-23-63 for P/N 4572185-XXX-0D0.
The FAA acknowledges the commenter's concern. The FAA reviewed the
Boeing service bulletins and determined that CMM 25-23-60 is referenced
as an accepted procedure for cleaning parts before reassembly, and that
the procedure is not marked as required for compliance (RC) with this
AD. This means operators may deviate from that procedure and use CMM
25-23-62 or 25-23-63, as applicable, without AMOC approval. The FAA has
not changed this AD in this regard.
Request To Add Option To Replace PSU Oxygen Panel Assembly in Lieu of
Repair
American requested that the FAA revise the proposed AD by adding an
option to remove a discrepant PSU oxygen panel assembly and replace it
with a compliant PSU oxygen panel assembly. American noted that Boeing
Alert Requirements Bulletins B787-81205-SB250277-00 and B787-81205-
SB250278-00, both Issue 001, both dated February 15, 2023, do not
provide an option for removing a discrepant PSU oxygen panel assembly
and installing a replacement PSU oxygen panel assembly that either has
a manufacture date of June 2020 or after, or manufacture date of May
2020 or before and a supplier service bulletin modification label
marked with the applicable service bulletin number and date. American
noted that reworking the PSU oxygen panel assemblies on the airplane
would be challenging because the applicable Collins Aerospace CMMs
require clean space, and this rework would be best to be done in a shop
environment.
The FAA agrees and has added paragraph (i) of this AD to allow
replacement of an affected PSU oxygen panel assembly with an acceptable
part instead of repairing the affected part. An acceptable part is a
PSU oxygen panel assembly, P/N 4572105-XXX-0D0, 4572175-XXX-0D0, or
4572185-XXX-0D0, as applicable, where ``XXX'' in the PSU oxygen panel
assembly part numbers is any combination of numerals, that has an
identification label with either a manufacture date of June 2020 or
after, or May 2020 or before and a supplier service bulletin
modification label marked with the applicable supplier service bulletin
number and date.
Request To Revise the Number of Affected Airplanes
American requested that the FAA revise the estimated number of
affected U.S.-registered airplanes from 19 to 59 in the Costs of
Compliance section of the proposed AD. American stated that, because
the PSU oxygen panels are rotable parts, the scope of the AD will
[[Page 44765]]
be associated with all 59 of American's Model 787-8 and 787-9
airplanes.
The FAA partially agrees. The FAA agrees to update the estimated
number of affected U.S.-registered airplanes but has revised the
estimate to 119 airplanes in the Cost of Compliance section. Paragraph
(g) of this AD requires a maintenance records check or inspection of
all airplane line numbers identified in Boeing Alert Requirements
Bulletins B787-81205-SB250277-00 RB, and B787-81205-SB250278-00 RB,
both Issue 001, both dated February 15, 2023, which include all 59 of
American's Model 787-8 and 787-9 airplanes among other airplanes. The
FAA clarifies that the maintenance records check or inspection does not
need to be accomplished on airplane line numbers not identified in the
Boeing requirements bulletins because the unsafe condition was
addressed on those airplanes during production. The FAA has revised the
estimated cost of compliance on U.S. operators, accordingly.
Request To Provide a List of Affected Part Numbers
United stated it would be prudent for either Boeing or Collins
Aerospace to provide a list of the part numbers that would be affected
by the proposed AD. United stated that the proposed AD would require
operators to check the center stowage bin PSU oxygen panel assemblies
for series of P/Ns 4572105-XXX-0D0, 4572175-XXX-0D0, and 4572185-XXX-
0D0 series and those manufactured in May 2020 and prior. United
asserted that this equates to approximately 64 different part numbers
primarily dependent on the number of masks and the duration (capacity)
of the compressed oxygen cylinder. United stated it would use the
itemized list of exact part numbers to earmark all the affected part
numbers as impacted by an AD in order to maintain compliance for its
current and future spare supply needs. United also stated this is
critical information for operators and suppliers given the proposed
requirement to prohibit installation of affected parts on airplanes.
The FAA does not agree with the request because providing an
itemized list of affected PSU part numbers increases the chance of
omitting a part number. The FAA has determined that the instructions
provided in the service information provide adequate information for
operators to identify affected PSU part numbers. The FAA has not
changed this AD in this regard.
Request To Clarify if the Unsafe Condition Only Exists on Certain Part
Numbers
United stated it would be prudent for Boeing to clarify in its
service information that the unsafe condition only exists on PSU oxygen
panel assembly P/Ns 4572105-XXX-0D0, 4572175-XXX-0D0, and 4572185-XXX-
0D0 that were manufactured in May 2020 and prior. United questioned
whether the pinching condition of the oxygen supply tube and the
stowage bin end blade exists on other families of Collins Aerospace PSU
oxygen panel assemblies with a different base part number (for example,
4572103-XXX-0D0). United stated it would be beneficial to know if any
other family of Collins Aerospace PSU part numbers are not applicable
and have been validated to not replicate the pinching condition, either
from a ``reverse bottle'' orientation contacting the aft face of a bin
blade or from a ``normal'' bottle orientation contacting the forward
face of a bin blade.
The FAA acknowledges the commenter's concern. As noted by Boeing's
public comment submission, the incorrect routing only applies to PSU
reverse bottle oxygen panel assemblies installed on the center stowage
bins. The outboard-installed PSU reverse bottle oxygen panel assemblies
were not impacted. The FAA has not changed this AD in this regard.
Request To Explain Missing Table in Boeing Service Information
United stated that table 5 seems to be missing from Boeing Alert
Requirements Bulletins B787-81205-SB250277-00 RB and B787-81205-
SB250278-00 RB, both Issue 001, both dated February 15, 2023. United
believes this to be a table pagination error between Boeing Alert
Service Bulletins B787-81205-SB250277-00 and B787-81205-SB250278-00,
both Issue 001, both dated February 15, 2023, and the corresponding
Boeing requirements bulletins.
The FAA infers United requests an explanation as to why the Boeing
requirements bulletins do not include table 5 while the related Boeing
service bulletins do. The FAA agrees to clarify the difference. In the
related service bulletin, the information between the locations marked
``RC Start'' and ``RC End'' is identical to the information in the same
sections of the requirement bulletins. Information not marked as an RC
step in the service bulletin is omitted from the requirements bulletin
because it is not required for compliance with the AD. The FAA reviewed
the related Boeing service bulletins and determined that the
information in table 5 of the service bulletins is not marked as an RC
step for AD compliance and therefore was intentionally omitted from the
Boeing requirements bulletin. The FAA has not changed this AD in this
regard.
Additional Changes to This AD
The FAA has added two notes to paragraph (g) of this AD specifying
that guidance for accomplishing the actions required by this AD can be
found in Boeing Alert Service Bulletins B787-81205-SB250277-00 and
B787-81205-SB250278-00, both Issue 001, both dated February 15, 2023.
The FAA has revised paragraph (j) of this AD to clarify that the
applicable supplier service bulletin numbers are identified in Boeing
Alert Service Bulletins B787-81205-SB250277-00 and B787-81205-SB250278-
00, both Issue 001, both dated February 15, 2023.
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, and
any other changes described previously, this AD is adopted as proposed
in the NPRM. None of the changes will increase the economic burden on
any operator.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletins B787-81205-
SB250277-00 RB and B787-81205-SB250278-00 RB, both Issue 001, both
dated February 15, 2023. This material specifies procedures for
verifying the identification label of the oxygen panel assembly, doing
a general visual inspection of the oxygen supply tube and initiator
cable assembly for correct installation, and doing a general visual
inspection for damage of the oxygen supply tubing. The material also
specifies procedures for on-condition actions: replacing the oxygen
supply tubing, re-routing of the oxygen supply tubing and initiator
cable assembly, and reidentifying equipment. These documents are
distinct since they apply to different airplane.
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.
[[Page 44766]]
Costs of Compliance
The FAA estimates that this AD affects 119 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Inspections and rerouting....... Up to 25 work- $0 Up to $2,125...... Up to $252,875.
hours x $85 per
hour = Up to
$2,125.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of the
inspection. The agency has no way of determining the number of aircraft
that might need the on-condition actions.
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Replacement of oxygen supply tube..... Up to 9 work-hours x $85 $30 Up to $795.
per hour = Up to $765.
----------------------------------------------------------------------------------------------------------------
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all the costs of this
AD may be covered under warranty, thereby reducing the cost impact on
affected operators.
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 adding the following new airworthiness
directive:
2025-18-02 The Boeing Company: Amendment 39-23129; Docket No. FAA-
2023-2398; Project Identifier AD-2023-00423-T.
(a) Effective Date
This airworthiness directive (AD) is effective October 22, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all The Boeing Company Model 787-8, 787-9,
and 787-10 airplanes, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 35, Oxygen.
(e) Unsafe Condition
This AD was prompted by a report indicating that the oxygen
supply tubing can become kinked when certain passenger service unit
(PSU) oxygen panel assemblies are installed in the forward-most
position of a center stow bin. The FAA is issuing this AD to address
incorrect installation of the oxygen supply tubing in the PSU oxygen
panel assemblies. The unsafe condition, if not addressed, could
result in kinked tubing and consequent injury of the airplane's
passengers because of a lack of supplemental oxygen during a cabin
depressurization event.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection of the Affected Parts
For airplanes identified in Boeing Alert Requirements Bulletins
B787-81205-SB250277-00 RB, Issue 001, dated February 15, 2023, and
B787-81205-SB250278-00 RB, Issue 001, dated February 15, 2023:
Except as specified by paragraph (h) of this AD, at the applicable
times specified in the ``Compliance'' paragraph of Boeing Alert
Requirements Bulletins B787-81205-SB250277-00 RB, Issue 001, dated
February 15, 2023, or B787-81205-SB250278-00 RB, Issue 001, dated
February 15, 2023, as applicable, do all applicable actions
identified in, and in accordance with, the Accomplishment
Instructions of Boeing Alert Requirements Bulletin B787-81205-
SB250277-00 RB, Issue 001, dated February 15, 2023, or B787-81205-
SB250278-00 RB, Issue 001, dated February 15, 2023, as applicable.
Note 1 to paragraph (g): Guidance for accomplishing the actions
required by this AD can be found in Boeing Alert Service Bulletin
B787-81205-SB250277-00, Issue 001, dated February 15, 2023, which is
[[Page 44767]]
referred to in Boeing Alert Requirements Bulletin B787-81205-
SB250277-00 RB, Issue 001, dated February 15, 2023.
Note 2 to paragraph (g): Guidance for accomplishing the actions
required by this AD can be found in Boeing Alert Service Bulletin
B787-81205-SB250278-00, Issue 001, dated February 15, 2023, which is
referred to in Boeing Alert Requirements Bulletin B787-81205-
SB250278-00 RB, Issue 001, dated February 15, 2023.
(h) Exceptions to Requirements Bulletin Specifications
(1) Where the Compliance Time columns of the tables in the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin B787-
81205-SB250277-00 RB, Issue 001, dated February 15, 2023, refer to a
compliance time of within 24 months after the Issue 001 date of the
Requirements Bulletin or within 24 months after date of issuance of
original standard certificate of airworthiness or original export
certificate of airworthiness, whichever occurs later, this AD
requires using within 36 months after the effective date of this AD
or within 36 months after date of issuance of original standard
certificate of airworthiness or original export certificate of
airworthiness, whichever occurs later.
(2) Where the Compliance Time columns of the tables in the
``Compliance'' paragraph of Boeing Alert Requirements Bulletin B787-
81205-SB250278-00 RB, Issue 001, dated February 15, 2023, refer to a
compliance time of within 24 months after the Issue 001 date of the
Requirements Bulletin or within 24 months after date of issuance of
original standard certificate of airworthiness or original export
certificate of airworthiness, whichever occurs later, this AD
requires using within 36 months after the effective date of this AD
or within 36 months after date of issuance of original standard
certificate of airworthiness or original export certificate of
airworthiness, whichever occurs later.
(3) Where Boeing Alert Requirements Bulletin B787-81205-
SB250277-00 RB, Issue 001, dated February 15, 2023, and Boeing Alert
Requirements Bulletin B787-81205-SB250278-00 RB, Issue 001, dated
February 15, 2023, specify that the corrective actions for
Conditions 2, 2.2, 2.2.2, and 3 must be done before further flight,
this AD requires that the corrective actions for those conditions be
done within 36 months after the effective date of this AD, or within
36 months after the date of issuance of original standard
certificate of airworthiness or original export certificate of
airworthiness, whichever occurs later.
(i) Optional Replacement
Replacement of a PSU oxygen panel assembly, part number (P/N)
4572105-XXX-0D0, 4572175-XXX-0D0, or 4572185-XXX-0D0 that was
manufactured in May 2020 or before, with an applicable PSU oxygen
panel assembly, P/N 4572105-XXX-0D0, 4572175-XXX-0D0, or 4572185-
XXX-0D0 that has the applicable identification label(s) specified in
paragraph (i)(1) or (2) of this AD, is acceptable for compliance
with the requirements of paragraph (g) of this AD, where ``XXX'' in
the PSU oxygen panel assembly part numbers is any combination of
numerals.
(1) An identification label with a manufacture date of June 2020
or after.
(2) An identification label with a manufacture date of May 2020
or before and a supplier service bulletin modification label marked
with the applicable supplier service bulletin number identified in
Boeing Alert Requirements Bulletin B787-81205-SB250277-00 RB, Issue
001, dated February 15, 2023, or Boeing Alert Requirements Bulletin
B787-81205-SB250278-00 RB, Issue 001, dated February 15, 2023, and
the supplier service bulletin date.
(j) Parts Installation Prohibition
As of the effective date of this AD, no person may install, on
any airplane, a PSU oxygen panel assembly, P/N 4572105-XXX-0D0,
4572175-XXX-0D0, or 4572185-XXX-0D0, where the ``XXX'' in the
affected PSU oxygen panel assembly part numbers is any combination
of numerals, that was manufactured in May 2020 or before, and does
not have a supplier service bulletin modification label marked with
an applicable supplier service bulletin number identified in Boeing
Alert Requirements Bulletin B787-81205-SB250277-00 RB, Issue 001,
dated February 15, 2023, or Boeing Alert Requirements Bulletin B787-
81205-SB250278-00 RB, Issue 001, dated February 15, 2023, and the
supplier service bulletin date.
(k) 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 (l) 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 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, 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.
(l) Related Information
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: [email protected].
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference 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 the AD specifies otherwise.
(i) Boeing Alert Requirements Bulletin B787-81205-SB250277-00
RB, Issue 001, dated February 15, 2023.
(ii) Boeing Alert Requirements Bulletin B787-81205-SB250278-00
RB, Issue 001, dated February 15, 2023.
(3) 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 myboeingfleet.com.
(4) 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.
(5) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].
Issued on September 2, 2025.
Lona C. Saccomando,
Acting Deputy Director, Integrated Certificate Management Division,
Aircraft Certification Service.
[FR Doc. 2025-17984 Filed 9-16-25; 8:45 am]
BILLING CODE 4910-13-P