Rule2026-11217
Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) 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
June 4, 2026
Effective
July 9, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all De Havilland Aircraft of Canada Limited Model DHC-8 airplanes. This AD was prompted by reports of cracked barrel nuts at the wing front spar and horizontal stabilizer to vertical stabilizer joint. This AD requires repetitive inspections for cracking and corrosion of the affected barrel nuts 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 107 (Thursday, June 4, 2026)</title>
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[Federal Register Volume 91, Number 107 (Thursday, June 4, 2026)]
[Rules and Regulations]
[Pages 33584-33587]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-11217]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-2558; Project Identifier MCAI-2021-00022-T;
Amendment 39-23367; AD 2026-11-06]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
De Havilland Aircraft of Canada Limited Model DHC-8 airplanes. This AD
was prompted by reports of cracked barrel nuts at the wing front spar
and horizontal stabilizer to vertical stabilizer joint. This AD
requires repetitive inspections for cracking and corrosion of the
affected barrel nuts and applicable corrective actions. The FAA is
issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective July 9, 2026.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of July 9, 2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-2558; 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 De Havilland Aircraft of Canada Limited material
identified in this AD, contact De Havilland Aircraft of Canada Limited,
Dash 8 Series Customer Response Centre, 5800 Explorer Drive,
Mississauga, Ontario, L4W 5K9, Canada; telephone North America (toll-
free): 855-310-1013, Direct: 647-277-5820; email <a href="/cdn-cgi/l/email-protection#b1c5d9d5f18dd091d9c3d4d78c" http: dehavilland.com">dehavilland.com</a>">thd@<a href="http://dehavilland.com">dehavilland.com</a></a>;
website <a href="http://dehavilland.com">dehavilland.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-2025-2558.
FOR FURTHER INFORMATION CONTACT: Christopher Spencer, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#2d14004c5b5e0043544c4e42004e425e6d4b4c4c034a425b"><span class="__cf_email__" data-cfemail="f6cfdb978085db988f979599db959985b6909797d8919980">[email protected]</span></a>.
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 De Havilland
Aircraft of Canada Limited Model DHC-8 airplanes. The NPRM was
published in the Federal Register on September 29, 2025 (90 FR 46538).
The NPRM was prompted by AD CF-2020-06R1, dated January 7, 2021 (also
referred to as the MCAI), issued by Transport Canada, which is the
aviation authority for Canada. The MCAI states there were findings
related to cracked barrel nuts at the wing front spar and horizontal
stabilizer to vertical stabilizer joint. For those locations, Transport
Canada issued Transport Canada AD CF-2011-24R1 (which corresponds to
FAA AD 2019-20-09, Amendment 39-19762 (84 FR 56680, October 23, 2019))
and Transport Canada AD CF-2015-13R1 (which corresponds to FAA AD 2018-
22-03, Amendment 39-19476 (83 FR 53563, October 24, 2018)) to address
the unsafe condition. Barrel nuts are also installed in other locations
on the airplane. An investigation determined that the cracking is
caused by corrosion from inadequate cadmium plating on the barrel nuts.
This condition, if not addressed, could result in failed barrel nuts
that could compromise the structural integrity of the affected joints
(i.e., of the airplane) and could lead to loss of control of the
airplane.
In the NPRM, the FAA proposed to require repetitive inspections for
cracking and corrosion of the affected barrel nuts and applicable
corrective actions. 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-2025-2558.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from the Air Line Pilots Association,
International (ALPA) who supported the NPRM without change.
The FAA received additional comments from the Citizens Rulemaking
Alliance. The following presents the comments received on the NPRM and
the FAA's response to each comment.
Request To Justify Forgoing Notice and Comment or Issue an NPRM
The commenter requested that the FAA provide its justification for
finding good cause to bypass notice and comment procedures and either
convert this action to an NPRM, or stay the effective date to allow
comments. The commenter asserted the FAA has not adequately justified
use of the good cause exemption to bypass notice and comment and the
30-day delayed effective date.
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 requested the FAA ensure that IBR
materials or summaries of them are in the public docket and are
accessible for free to the public and affected parties for both
commenting and compliance purposes. The commenter stated that the FAA's
rule must comply with statutory and regulatory requirements for the
reasonable availability of material incorporated by reference.
The FAA's practices comply with 5 U.S.C. 552(a) of the
Administrative Procedure Act and 1 CFR part 51. The FAA makes IBR
materials available in the AD docket when the final rule is published
in the Federal Register, following formal approval of the IBR by the
Office of the Federal Register. Materials may only be posted before the
final rule's publication if they are already publicly available or if
there is written consent from the owner of the IBR material. All
relevant materials incorporated by reference will be
[[Page 33585]]
accessible in the AD docket on Regulations.gov, which the public can
access without registration or fees.
The FAA also provides summaries and access details in the preamble
and regulatory text, makes materials available for inspection at FAA
and National Archives and Records Administration (NARA) offices, offers
publisher contact information, and obtains formal IBR approval from the
Office of the Federal Register. These efforts are intended to ensure
that all IBR materials meet the ``reasonably available'' standard
required by 1 CFR part 51. 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 needed, the commenter requested the FAA clarify that in the AD.
The FAA notes 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.
Request To Consider Impact on Small Entities
The Citizens Rulemaking Alliance requested that the FAA either
provide the factual basis for its Regulatory Flexibility Act (RFA)
certification that the AD will not have a significant economic impact
on a substantial number of small entities, or prepare an initial
regulatory flexibility analysis.
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.
This AD will affect nine domestic entities, of which four are small
business entities. The table below displays the industries of the small
entities, their average annual revenue, and the AD's estimated cost
burden relative to average annual revenue.
Number of Small Entities Affected by Industry and Cost Significance
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NAICS Number of Average Cost per AD/
Number of affected \1\ Description affected annual annual revenue
entities code airplanes revenue (%)
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1......................... 481211 Nonscheduled Chartered 6 $11,430,000 0.06
Passenger Air
Transportation.
1......................... 481211 Nonscheduled Chartered 5 9,830,000 0.06
Passenger Air
Transportation.
1......................... 481211 Nonscheduled Chartered 1 84,777 1.30
Passenger Air
Transportation.
1......................... 561710 Exterminating and Pest 3 92,090 3.60
Control Services.
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\1\ North American Industrial Classification System.
While the FAA has determined that this AD affects a number of small
entities, the compliance cost of the AD relative to each small entity's
annual revenue is minimal. The FAA estimates the total cost per
affected airplane to be $1,105 (13 work-hours x $85 per work-hour),
which is less than 2% of the average small entity's annual revenue
based on the number of affected airplanes in their fleet. Therefore, as
provided in section 605(b), the FAA certifies 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.
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 De Havilland Aircraft of Canada Limited Service
Bulletin 8-05-11, dated April 29, 2022. This material specifies
procedures for detailed inspections for cracks and corrosion of the
barrel nuts at the flight compartment windshield side posts, the nose
landing gear trunnion plate assemblies, nacelle lower longeron
attachments, the front, mid and rear spar horizontal stabilizer to
vertical stabilizer attachments, the bathtub fittings attachments, the
wing rib YW23.858 assemblies, and at the wing rib YW42.00 assemblies,
and applicable corrective actions (e.g., repairs or replacement).
The FAA also reviewed De Havilland Aircraft of Canada Limited
Service Bulletin 84-27-73, dated May 8, 2019; and De Havilland Aircraft
of Canada Limited Service Bulletin 8-27-121, dated July 30, 2019. This
material specifies procedures, for a detailed inspection for cracks and
corrosion of the barrel nuts, having part number (P/N) DSC228-4, at the
rudder pedal adjustment mechanism, and applicable corrective actions
(i.e., replacement of barrel nuts, having P/N DSC228-4, with barrel
nuts, having P/N B0203073-4). These documents are distinct since they
apply to different airplane models.
The FAA also reviewed De Havilland Aircraft of Canada Limited
Service Bulletin 8-27-122, dated July 18, 2019. This material specifies
procedures for a detailed inspection for cracks and corrosion of the
barrel nuts, having P/N DSC228-5, at the control attachment fittings,
and applicable corrective actions (i.e., replacement of barrel nuts,
[[Page 33586]]
having P/N DSC228-5, with barrel nuts, having P/N B0203073-5).
The FAA also reviewed De Havilland Aircraft of Canada Limited
Service Bulletin 84-05-02, dated April 29, 2022. This material
specifies procedures for detailed inspections for cracks and corrosion
of the barrel nuts at the flight compartment windshield side posts, the
vertical stabilizer pitch feel trim frame, the front and rear spar wing
to fuselage attachment joint struts and fittings, and the bathtub
fitting attachments, and applicable corrective actions (e.g., repairs
or replacement).
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 91 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 13 work-hours x $85 per hour = $0 Up to $1,105.............. Up to $100,555.
$1,105.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary on-
condition actions 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 these on-condition actions:
Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
Labor cost Parts cost Cost per product
------------------------------------------------------------------------
Up to 8 work-hours x $85 per hour * $0 Up to $680.
= $680.
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* The FAA has received no definitive data on which to base the cost
estimates for the parts specified in this AD.
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:
2026-11-06 De Havilland Aircraft of Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.): Amendment 39-23367; Docket No.
FAA-2025-2558; Project Identifier MCAI-2021-00022-T.
(a) Effective Date
This airworthiness directive (AD) is effective July 9, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all De Havilland Aircraft of Canada Limited
(Type Certificate previously held by Bombardier, Inc.) airplanes,
certificated in any category, identified in paragraphs (c)(1)
through (4) of this AD.
(1) Model DHC-8-101, -102, -103, and -106 airplanes.
(2) Model DHC-8-201 and -202 airplanes.
(3) Model DHC-8-301, -311, and -315 airplanes.
(4) Model DHC-8-400, -401, and -402 airplanes.
(d) Subject
Air Transport Association (ATA) of America Code 14, Hardware;
51, Standard practices/structures.
(e) Unsafe Condition
This AD was prompted by reports of cracked barrel nuts at the
wing front spar and horizontal stabilizer to vertical stabilizer
joint, which was caused by corrosion from inadequate cadmium plating
on the barrel nuts. The FAA is issuing this AD to address cracking
and corrosion of the affected barrel nuts. The unsafe condition, if
not addressed, could result in failed barrel nuts that could
compromise the structural integrity of the
[[Page 33587]]
airplane and could lead to loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Actions for Model DHC-8-100, -200, and -300 Series Airplanes
For Model DHC-8-101, -102, -103, and -106 airplanes, Model DHC-
8-201 and -202 airplanes, and Model DHC-8-301, -311, and -315
airplanes: Do the actions specified in paragraphs (g)(1) through (4)
of this AD.
(1) As of 60 days after the effective date of this AD: At the
next flight compartment windshield replacement, do a detailed
inspection for cracks and corrosion of the barrel nuts at the
windshield side posts and, before further flight, do all applicable
corrective actions, in accordance with the Accomplishment
Instructions of De Havilland Aircraft of Canada Limited Service
Bulletin 8-05-11, dated April 29, 2022. Repeat the inspection
thereafter at each flight compartment windshield replacement.
(2) Within 6 years since entry into service, or within 60 days
after the effective date of this AD, whichever occurs later, do
detailed inspections for cracks and corrosion of the barrel nuts at
the nose landing gear trunnion plate assemblies, nacelle lower
longeron attachments, the front, mid and rear spar horizontal
stabilizer to vertical stabilizer attachments, the bathtub fittings
attachments, the wing rib YW23.858 assemblies, and the wing rib
YW42.00 assemblies, and before further flight, do all applicable
corrective actions, in accordance with the Accomplishment
Instructions of De Havilland Aircraft of Canada Limited Service
Bulletin 8-05-11, dated April 29, 2022. Repeat the inspection
thereafter at intervals not to exceed 6 years.
(3) Within 6 years since entry into service, or within 60 days
after the effective date of this AD, whichever occurs later, do a
detailed inspection for cracks and corrosion of the barrel nuts,
having part number (P/N) DSC228-5, at the control attachment
fittings, and before further flight, do all applicable corrective
actions, in accordance with the Accomplishment Instructions of De
Havilland Aircraft of Canada Limited Service Bulletin 8-27-122,
dated July 18, 2019. Repeat the inspection thereafter at intervals
not to exceed 6 years.
(4) Within 7 years since entry into service, or within 60 days
after the effective date of this AD, whichever occurs later, do a
detailed inspection for cracks and corrosion of the barrel nuts,
having P/N DSC228-4, at the rudder pedal adjustment mechanism, and
before further flight, do all applicable corrective actions, in
accordance with the Accomplishment Instructions of De Havilland
Aircraft of Canada Limited Service Bulletin 8-27-121, dated July 30,
2019. Repeat the inspection thereafter at intervals not to exceed 7
years.
(h) Actions for Model DHC-8-400 Series Airplanes
For Model DHC-8-400, -401, and -402 airplanes: Do the actions
specified in paragraphs (h)(1) through (3) of this AD.
(1) As of 60 days after the effective date of this AD: At the
next flight compartment windshield replacement, do a detailed
inspection for cracks and corrosion of the barrel nuts at the flight
compartment windshield side posts, and before further flight, do all
applicable corrective actions, in accordance with the Accomplishment
Instructions of De Havilland Aircraft of Canada Limited Service
Bulletin 84-05-02, dated April 29, 2022. Repeat the inspection
thereafter at each flight compartment windshield replacement.
(2) Within 6 years since entry into service, or within 60 days
after the effective date of this AD, whichever occurs later, do
detailed inspections for cracks and corrosion of the barrel nuts at
the vertical stabilizer pitch feel trim frame, the front and rear
spar wing to fuselage attachment joint struts and fittings, and the
bathtub fitting attachments, and before further flight, do all
applicable corrective actions, in accordance with the Accomplishment
Instructions of De Havilland Aircraft of Canada Limited Service
Bulletin 84-05-02, dated April 29, 2022. Repeat the inspections
thereafter at intervals not to exceed 6 years.
(3) Within 7 years since entry into service, or within 60 days
after the effective date of this AD, whichever occurs later, do a
detailed inspection for cracks and corrosion of the barrel nuts,
having P/N DSC228-4, at the rudder pedal adjustment mechanism, and
before further flight, do all applicable corrective actions, in
accordance with the Accomplishment Instructions of De Havilland
Aircraft of Canada Limited Service Bulletin 84-27-73, dated May 8,
2019. Repeat the inspection thereafter at intervals not to exceed 7
years.
(i) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
International Validation 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
International Validation Branch, send it to the attention of the
person identified in paragraph (j) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#591814161a193f3838773e362f"><span class="__cf_email__" data-cfemail="6524282a26250304044b020a13">[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) 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, International
Validation Branch, FAA; or Transport Canada; or De Havilland
Aircraft of Canada Limited's Transport Canada Design Approval
Organization (DAO). If approved by the DAO, the approval must
include the DAO-authorized signature.
(j) Additional Information
For more information about this AD, contact Christopher Spencer,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#50697d3126237d3e2931333f7d333f23103631317e373f26"><span class="__cf_email__" data-cfemail="b88195d9cecb95d6c1d9dbd795dbd7cbf8ded9d996dfd7ce">[email protected]</span></a>.
(k) 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) De Havilland Aircraft of Canada Limited Service Bulletin 8-
05-11, dated April 29, 2022.
(ii) De Havilland Aircraft of Canada Limited Service Bulletin 8-
27-121, dated July 30, 2019.
(iii) De Havilland Aircraft of Canada Limited Service Bulletin
8-27-122, dated July 18, 2019.
(iv) De Havilland Aircraft of Canada Limited Service Bulletin
84-05-02, dated April 29, 2022.
(v) De Havilland Aircraft of Canada Limited Service Bulletin 84-
27-73, dated May 8, 2019.
(3) For De Havilland Aircraft of Canada Limited material
identified in this AD, contact De Havilland Aircraft of Canada
Limited, Dash 8 Series Customer Response Centre, 5800 Explorer
Drive, Mississauga, Ontario, L4W 5K9, Canada; telephone North
America (toll-free): 855-310-1013, Direct: 647-277-5820; email
<a href="/cdn-cgi/l/email-protection#a8dcc0cce894c988c0dacdce95" http: dehavilland.com">dehavilland.com</a>">thd@<a href="http://dehavilland.com">dehavilland.com</a></a>; website <a href="http://dehavilland.com">dehavilland.com</a>.
(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#5a3c28743334292a3f392e3335341a343b283b743d352c"><span class="__cf_email__" data-cfemail="95f3e7bbfcfbe6e5f0f6e1fcfafbd5fbf4e7f4bbf2fae3">[email protected]</span></a>.
Issued on May 26, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-11217 Filed 6-3-26; 8:45 am]
BILLING CODE 4910-13-P
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