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Rule2026-10491

Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

Primary source

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Published

May 27, 2026

Effective

July 1, 2026

Issuing agencies

Transportation DepartmentFederal Aviation Administration

Abstract

The FAA is superseding Airworthiness Directive (AD) 2024-04- 06, which applied to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2024-04-06 required repetitive operational checks of the gravity cross flow shut-off valve and, for certain airplanes, a one-time inspection of the motive flow fuel-feed tubes at the clamp blocks location and applicable corrective actions. Since the FAA issued AD 2024-04-06, the manufacturer developed additional corrective actions. This AD continues to require the actions in AD 2024-04-06 and requires replacement of the saddle clamp, inspection of the motive flow fuel-feed tubes, and applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.

Full Text

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<title>Federal Register, Volume 91 Issue 101 (Wednesday, May 27, 2026)</title>
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[Federal Register Volume 91, Number 101 (Wednesday, May 27, 2026)]
[Rules and Regulations]
[Pages 31349-31353]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-10491]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-5024; Project Identifier MCAI-2025-00797-T;
Amendment 39-23352; AD 2026-10-12]
RIN 2120-AA64

Airworthiness Directives; Airbus Canada Limited Partnership (Type
Certificate Previously Held by C Series Aircraft Limited Partnership
(CSALP); Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2024-04-
06, which applied to certain Airbus Canada Limited Partnership Model
BD-500-1A10 and BD-500-1A11 airplanes. AD 2024-04-06 required
repetitive operational checks of the gravity cross flow shut-off valve
and, for certain airplanes, a one-time inspection of the motive flow
fuel-feed tubes at the clamp blocks location and applicable corrective
actions. Since the FAA issued AD 2024-04-06, the manufacturer developed
additional corrective actions. This AD continues to require the actions
in AD 2024-04-06 and requires replacement of the saddle clamp,
inspection of the motive flow fuel-feed tubes, and applicable
corrective actions. The FAA is issuing this AD to address the unsafe
condition on these products.

DATES: This AD is effective July 1, 2026.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of July 1,
2026.

ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-5024; or in person at Docket Operations between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD
docket contains this final rule, the mandatory continuing airworthiness
information (MCAI), 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 Transport Canada material identified in this AD,
contact Transport Canada, Transport Canada National Aircraft
Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada;
telephone 888-663-3639; email <a href="/cdn-cgi/l/email-protection#47130469062e35302835332f2e29223434032e352224332e3122346a042829342e2029223423222926312e2026252e2b2e3322691304073324692024692426">[email&#160;protected]</a>. You may find this material on the
Transport Canada website at tc.canada.ca/en/aviation.
<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-2025-5024.

FOR FURTHER INFORMATION CONTACT: Erica Bayles, Aviation Safety
Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 907-
271-5844; email: <a href="/cdn-cgi/l/email-protection#f99c8b909a98d79cd79b9880959c8ab99f9898d79e968f">[email&#160;protected]</a>.

SUPPLEMENTARY INFORMATION:

Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2024-04-06, Amendment 39-22685 (89 FR
19228, March 18, 2024) (AD 2024-04-06). AD 2024-04-06 applied to
certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-
1A11 airplanes. AD 2024-04-06 required repetitive operational checks of
the gravity cross flow shut-off valve and, for certain airplanes, a
one-time inspection of the motive flow fuel-feed tubes at the clamp
blocks location and applicable corrective actions. The FAA issued AD
2024-04-06 to address mechanical wear damage on the motive flow fuel-
feed tubes. Failure of the affected motive flow fuel-feed tubes and a
subsequent failure of the gravity transfer system could lead to a fuel
imbalance condition resulting in a reduction in airplane functional
capabilities and increased crew workload.
The NPRM was published in the Federal Register on November 19, 2025
(90 FR 52005). The NPRM was prompted by Transport Canada AD CF-2025-24,
dated April 29, 2025 (Transport Canada AD CF-2025-24) (also referred to
as the MCAI), issued by Transport Canada, which is the aviation
authority for Canada. Transport Canada AD CF-2025-24 superseded
Transport Canada AD CF-2022-70, dated December 21, 2022 (Transport
Canada AD CF-2022-70), which corresponds to AD 2024-04-06. The MCAI
states that since Transport Canada AD CF-2022-70 was issued, the
manufacturer issued new service information to require replacement of
the saddle clamp of the motive flow tubes, along with an inspection and
rectification of the flow fuel-feed tubes.
In the NPRM, the FAA proposed to continue to require the actions in
AD

[[Page 31350]]

2024-04-06 and require replacement of the saddle clamp, inspection of
the motive flow fuel-feed tubes, and applicable corrective actions, as
specified in Transport Canada AD CF-2025-24. The FAA is issuing this AD
to address the unsafe condition on these products.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-5024.

Discussion of Final Airworthiness Directive

Comments

The FAA received comments from the Airline Pilots Association,
International (ALPA) who supported the NPRM without change.
The FAA received additional comments from Delta Air Lines (Delta)
and Citizens Rulemaking Alliance. The following presents the comments
received on the NPRM and the FAA's response to each comment.

Request To Revise Exception for Tube Replacement

Delta requested that the FAA revise the exception in paragraph
(h)(5) of the proposed AD by adding reference to Part III of Transport
Canada AD CF-2025-24. Delta noted, as proposed, the exception would
only apply to Part II of Transport Canada AD CF-2025-24. Delta stated
that there is a clear coating on the area behind the saddle clamp,
which makes it difficult to distinguish between actual damage and paint
or coating damage. Delta concluded that revising the exception would
allow operators to replace the motive flow fuel-feed tubes instead of
doing rework if there is any confusion as to whether the damage is to
the coating, paint, or tube.
The FAA agrees that the exception in paragraph (h)(5) of this AD
applies to Parts II and III of Transport Canada AD CF-2025-24 and has
revised that paragraph accordingly. The FAA infers that the area behind
the saddle clamp as referred to by the commenter is the area of the
motive flow fuel-feed tube that mates with the saddle clamp. The FAA
notes that the rework referenced in paragraph (h)(5) of this AD is
related to different tasks required by Parts II and III of Transport
Canada AD CF-2025-24. The rework under Part II is provided in Step 2.6
of Section 2 (Procedure) of Spirit Service Bulletin 500SHW-28-2109,
Issue 005, dated October 2, 2023, as documented in the preamble of AD
2024-04-06, and it requires checking the motive flow fuel-feed tube for
pre-load condition if the tube is found with no damage or paint damage
only. The rework under Part III is provided in Step 2.7 of Section 2
(Procedure) of Spirit AeroSystems Belfast Service Bulletin 500SHW-28-
2112, Issue 001, dated July 24, 2024, and it requires application of
finish to the motive flow fuel-feed tube if the tube is found with
paint damage only.

Request To Use Alternative Service Information for Tube Installation

Delta requested that the FAA add an exception to paragraph (h) of
the proposed AD to allow the installation of new motive flow fuel-feed
tubes specified in Part III of Transport Canada AD CF-2025-24 to be
done using the service information referenced in Part II of Transport
Canada AD CF-2025-24, if the tube installations in Parts II and III are
done concurrently. Delta noted that the service information referenced
in Part III of Transport Canada AD CF-2025-24 specifies doing the tube
installation per an airplane maintenance manual (AMM) task. Delta
stated that if the actions in Parts II and III of Transport Canada AD
CF-2025-24 are done concurrently and damage is found behind the saddle
clamp and clamp block, then operators would need to follow two
different instruction methods to address the damage.
The FAA disagrees with the request because an exception is not
needed to address Delta's concern. The service information referenced
in Part III of Transport Canada AD CF-2025-24 does not prescribe a
specific method for installing new motive flow fuel-feed tubes. Instead
that service information refers to a maintenance manual as an
acceptable procedure for doing the installation. Therefore, if the
actions in Parts II and Part III of Transport Canada AD CF-2025-24 are
done concurrently and new motive flow fuel-feed tubes must be installed
per Parts II and III, then operators may comply with the tube
installation specified in Part III by using the tube installation
method prescribed in the service information referenced in Part II. The
FAA did not change this AD as a result of this comment.

Request To Issue an NPRM or Delay Effective Date for Non-Immediate
Tasks

The Citizens Rulemaking Alliance requested that the FAA either
provide its justification for finding good cause to bypass notice and
comment procedures, or convert this action to an NPRM and stay
enforcement for non-immediate requirements. The commenter asserted the
FAA's use of the good cause exemption appears insufficiently supported.
The FAA notes the comment was submitted in response to an NPRM for
which the FAA provided a 45-day comment period. This final rule is
effective 35 days after its publication in the Federal Register.
Therefore, no change to this AD is necessary.

Request To Make Incorporation by Reference (IBR) Materials Reasonably
Available

The Citizens Rulemaking Alliance stated that the FAA's current
practices for IBR frequently fail to meet the legal and regulatory
standards for reasonable availability. The commenter called on the FAA
to guarantee that all IBR materials are easily and freely accessible to
the public and affected parties for both commenting and compliance
purposes. The commenter also requested that this access be documented
in the rulemaking record.
The FAA notes that this AD incorporates by reference Transport
Canada AD CF-2025-24, not the manufacturer service information
referenced in that Transport Canada AD. The FAA posted Transport Canada
AD CF-2025-24 to the AD docket when the NPRM was published in the
Federal Register. The material referenced in Transport Canada AD CF-
2025-24 may only be posted before the final rule's publication if it is
already publicly available or if there is written consent from the
owner of that material. Additionally, the FAA provided notice in the
NPRM that the material referenced in Transport Canada AD CF-2025-24
will be available in the AD docket after this AD is published.
Therefore, the FAA did not change this AD as a result of this comment.

Request To Comply With the Paperwork Reduction Act (PRA)

The Citizens Rulemaking Alliance requested that the FAA revise the
AD to comply with the PRA if reporting is required or remove any
reporting provisions until PRA requirements are satisfied. If reporting
is not required, the commenter requested the FAA clarify that in the
AD.
The FAA notes paragraph (i) of this AD specifies that this AD does
not require reporting. If an AD were to require reporting, the preamble
of the AD would include a paragraph titled ``Paperwork Reduction Act''
that would provide the applicable OMB control number, required PRA
statements, and the estimated time to collect the required information
(burden). Any costs associated with the reporting requirement would be
included in the Costs of Compliance section in the preamble of the AD.
Therefore, the FAA did not change this AD as a result of this comment.

[[Page 31351]]

Request To Consider Impact on Small Entities

The commenter requested that the FAA certify under the Regulatory
Flexibility Act (RFA) that the AD will not have a significant economic
impact on a substantial number of small entities, or prepare an initial
regulatory flexibility analysis if it cannot be certified.
The FAA provides the following clarification. The RFA of 1980 (5
U.S.C. 601-612), as amended by the Small Business Regulatory
Enforcement Fairness Act of 1996 (Pub. L. 104-121) and the Small
Business Jobs Act of 2010 (Pub. L. 111-240), requires Federal agencies
to consider the effects of the regulatory action on small business and
other small entities and to minimize any significant economic impact.
The term ``small entities'' comprises small businesses and not-for-
profit organizations that are independently owned and operated and are
not dominant in their fields, and governmental jurisdictions with
populations of less than 50,000.
The FAA identified three air carriers that will be affected by this
AD. Based on the Small Business Administration (SBA) size standard, all
three entities are large businesses:

Small Business Size Standards \1\
------------------------------------------------------------------------
NAICS \2\ code Description Size standard
------------------------------------------------------------------------
481111.......................... Scheduled 1,500 employees.
Passenger Air
Transportation.
------------------------------------------------------------------------
\1\ Source: <a href="http://sba.gov">sba.gov</a>: Table of Small Business Size Standards.
\2\ North American Industrial Classification System.

If an agency determines that a rulemaking will not result in a
significant economic impact on a substantial number of small entities,
the head of the agency may certify under section 605(b) of the RFA.
Therefore, as provided in section 605(b) and based on the foregoing,
the head of the FAA certifies that this AD will not result in a
significant economic impact on a substantial number of small entities.
The FAA did not change this AD as a result of this comment.

Request To Revise the Cost Estimate

The Citizens Rulemaking Alliance requested that the FAA augment the
rulemaking docket with the cost methodology and assumptions, including
the labor rate, parts availability, and expected downtime.
In the Costs of Compliance section of the proposed AD, the FAA
disclosed the number of affected airplanes on the U.S. registry,
estimated number of work hours and parts cost provided by the
manufacturer, and the aggregate costs. Additionally, the FAA considered
the impact that this AD will have on affected operators and determined
this AD will not trigger any downtime costs because the requirements of
this AD can be performed during regularly scheduled maintenance. Since
the FAA has assessed and disclosed the total known costs of the AD
requirements in the Costs of Compliance section of the proposed AD, and
the commenter did not provide additional cost data for the FAA to
consider in its cost analysis, it is not necessary to reopen the
comment period or provide additional information in the AD docket. The
FAA did not change this AD as a result of this comment.

Conclusion

These products have been approved by the civil aviation authority
of another country and are approved for operation in the United States.
Pursuant to the FAA's bilateral agreement with this State of Design
Authority, that authority has notified the FAA of the unsafe condition
described in the MCAI referenced above. 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.

Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed Transport Canada AD CF-2025-24, which specifies
procedures for performing a repetitive operational check of the gravity
cross flow shut-off valve and, for certain airplanes, inspecting the
motive flow fuel-feed tubes for mechanical wear damage (damage
includes, but is not limited to, cracks, scores, scratches, nicks, and
gouges) and pre-load condition, and, based on findings, replacing the
motive flow fuel-feed tube. This material also specifies procedures for
replacing the saddle clamp of the motive flow fuel-feed tubes on both
left and right sides, inspecting the motive flow fuel-feed tubes for
damage (damage includes, but is not limited to, cracks, scores,
scratches, nicks, and gouges) and, based on findings, repairing or
replacing the motive flow fuel-feed tube. 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.

Interim Action

The preamble to AD 2024-04-06 explained that the FAA considers that
AD an ``interim action'' and the FAA might consider further rulemaking
if a final action is identified. The manufacturer has since developed
additional corrective actions to address the unsafe condition. The FAA
has determined that the additional corrective actions should be
required.

Costs of Compliance

The FAA estimates that this AD affects 96 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD 2024-04- Up to 16.5 work- $0 Up to $1,403........ Up to $134,688.
06. hours x $85 per
hour = $1,403.
New actions...................... 6 work-hours x $85 704 1,214............... 116,544.
per hour = $510.
----------------------------------------------------------------------------------------------------------------

[[Page 31352]]

The FAA estimates the following costs to do any necessary on-
condition action that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need this on-condition action:

Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
Labor cost Parts cost Cost per product
------------------------------------------------------------------------
12 work-hours x $85 per hour = $5,256............ $6,276.
$1,020 (retained from AD 2024-
04-06).
Up to 12 work-hours x $85 per Up to $5,130...... Up to $6,150.
hour = $1,020 (new actions).
------------------------------------------------------------------------

According to the manufacturer, some or all of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
affected operators. The FAA does not control warranty coverage for
affected operators. As a result, the FAA has included all known costs
in the cost estimate.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: General requirements.
Under that section, Congress charges the FAA with promoting safe flight
of civil aircraft in air commerce by prescribing regulations for
practices, methods, and procedures the Administrator finds necessary
for safety in air commerce. This regulation is within the scope of that
authority because it addresses an unsafe condition that is likely to
exist or develop on products identified in this rulemaking action.

Regulatory Findings

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

List of Subjects in 14 CFR Part 39

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

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) 2024-04-06, Amendment 39-22685
(89 FR 19228, March 18, 2024); and
0
b. Adding the following new AD:

2026-10-12 Airbus Canada Limited Partnership (Type Certificate
Previously Held by C Series Aircraft Limited Partnership (CSALP);
Bombardier, Inc.): Amendment 39-23352; Docket No. FAA-2025-5024;
Project Identifier MCAI-2025-00797-T.

(a) Effective Date

This airworthiness directive (AD) is effective July 1, 2026.

(b) Affected ADs

This AD replaces AD 2024-04-06, Amendment 39-22685 (89 FR 19228,
March 18, 2024) (AD 2024-04-06).

This AD applies to Airbus Canada Limited Partnership (Type
Certificate previously held by C Series Aircraft Limited Partnership
(CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11
airplanes, certificated in any category, as identified in Transport
Canada AD CF-2025-24, dated April 29, 2025 (Transport Canada AD CF-
2025-24).

(d) Subject

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

(e) Unsafe Condition

This AD was prompted by reports of mechanical wear damage on the
motive flow fuel-feed tubes that were secured by bonding clamps and
clamp blocks inside the collector tank. This AD was also prompted by
a determination that replacement of the saddle clamps of the motive
flow tubes is also needed to address the unsafe condition. The FAA
is issuing this AD to address mechanical wear damage on the motive
flow fuel-feed tubes. The unsafe condition, if not addressed, could
result in failure of the affected motive flow fuel-feed tubes and a
subsequent failure of the gravity transfer system, which could lead
to a fuel imbalance condition resulting in a reduction in airplane
functional capabilities and increased crew workload.

(f) Compliance

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

(g) Requirements

Except as specified in paragraphs (h) and (i) of this AD: Comply
with all required actions and compliance times specified in, and in
accordance with, Transport Canada AD CF-2025-24.

(h) Exception to Transport Canada AD CF-2025-24

(1) Where Transport Canada AD CF-2025-24 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2025-24 refers to January 4,
2023 (the effective date of Transport Canada AD CF-2022-70), this AD
requires using April 22, 2024 (the effective date of AD 2024-04-06).
(3) Where Transport Canada AD CF-2025-24 refers to hours air
time, this AD requires using flight hours.
(4) Where Parts II and III of Transport Canada AD CF-2025-24
specify to ``rectify, as applicable'', this AD requires replacing
that text with ``accomplish all applicable corrective actions before
further flight''.
(5) Where the service information referenced in Parts II and III
of Transport Canada AD CF-2025-24 specifies to do rework if there is
no damage or paint damage only, operators may either do the rework
or replace the fuel tubes as specified in the service information
referenced in Parts II and III of Transport Canada AD CF-2025-24.
(6) Where Part III of Transport Canada AD CF-2025-24 specifies
inspecting for ``a damage'', this AD requires replacing that text
with ``damage (damage includes, but is not limited to, cracks,
scores, scratches, nicks, and gouges)''.

(i) No Reporting Requirement

Although the service information referenced in Transport Canada
AD CF-

[[Page 31353]]

2025-24 specifies to submit certain information to the manufacturer,
this AD does not include that requirement.

(j) Additional AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): 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 (k) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#bcfdf1f3fffcdadddd92dbd3ca">[email&#160;protected]</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) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, AIR-520,
Continued Operational Safety Branch, FAA; or Transport Canada; or
Airbus Canada Limited Partnership's Transport Canada Design Approval
Organization (DAO). If approved by the DAO, the approval must
include the DAO-authorized signature.

(k) Additional Information

For more information about this AD, contact Erica Bayles,
Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA
98198; phone: 907-271-5844; email: <a href="/cdn-cgi/l/email-protection#3154435852501f541f5350485d5442715750501f565e47">[email&#160;protected]</a>.

(l) 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 this AD specifies otherwise.
(i) Transport Canada AD CF-2025-24, dated April 29, 2025.
(ii) [Reserved]
(3) For Transport Canada material identified in this AD, contact
Transport Canada, Transport Canada National Aircraft Certification,
159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-
663-3639; email <a href="/cdn-cgi/l/email-protection#6c382f422d051e1b031e18040502091f1f28051e090f18051a091f412f03021f050b02091f0809020d1a050b0d0e050005180942382f2c180f420b0f420f0d">[email&#160;protected]</a>. You may find this material on
the Transport Canada website at tc.canada.ca/en/aviation.
(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 <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#3056421e595e4340555344595f5e705e5142511e575f46">[email&#160;protected]</a>.

Issued on May 11, 2026.
Brian Knaup,
Acting Deputy Director, Integrated Certificate Management Division,
Aircraft Certification Service.
[FR Doc. 2026-10491 Filed 5-26-26; 8:45 am]
BILLING CODE 4910-13-P

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