Rule2026-03055
Airworthiness Directives; 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
February 17, 2026
Effective
March 4, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Inc. Model BD-700-1A10 and BD-700-1A11 airplanes. The FAA previously sent this AD to all known U.S. owners and operators of these airplanes. This AD was prompted by discrepancies in the locking features on certain network interfaces. This AD requires installing locking features on certain network interfaces to prevent unapproved access to these network interfaces. 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 31 (Tuesday, February 17, 2026)</title>
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[Federal Register Volume 91, Number 31 (Tuesday, February 17, 2026)]
[Rules and Regulations]
[Pages 7113-7115]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-03055]
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Rules and Regulations
Federal Register
________________________________________________________________________
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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. 91, No. 31 / Tuesday, February 17, 2026 /
Rules and Regulations
[[Page 7113]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-1327; Project Identifier MCAI-2025-00042-T;
Amendment 39-23263; AD 2025-14-51]
RIN 2120-AA64
Airworthiness Directives; Bombardier Inc. Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Bombardier Inc. Model BD-700-1A10 and BD-700-1A11 airplanes.
The FAA previously sent this AD to all known U.S. owners and operators
of these airplanes. This AD was prompted by discrepancies in the
locking features on certain network interfaces. This AD requires
installing locking features on certain network interfaces to prevent
unapproved access to these network interfaces. The FAA is issuing this
AD to address the unsafe condition on these products.
DATES: This AD is effective March 4, 2026. AD 2025-14-51, issued on
July 10, 2025, which contains the requirements of this amendment, was
effective upon receipt.
The FAA must receive comments on this AD by April 3, 2026.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-1327; 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
street address for Docket Operations is listed above.
<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-2026-1327.
FOR FURTHER INFORMATION CONTACT: William Reisenauer, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7301; email: <a href="/cdn-cgi/l/email-protection#a9dec0c5c5c0c8c487cc87dbccc0daccc7c8dcccdbe9cfc8c887cec6df"><span class="__cf_email__" data-cfemail="27504e4b4b4e464a09420955424e544249465242556741464609404851">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this final rule. Send your comments using a method listed under
the ADDRESSES section. Include ``Docket No. FAA-2026-1327; Project
Identifier MCAI-2025-00042-T'' at the beginning of your comments. The
most helpful comments reference a specific portion of the final rule,
explain the reason for any recommended change, and include supporting
data. The FAA will consider all comments received by the closing date
and may amend this final rule because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this final rule.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this AD contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this AD, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this AD. Submissions containing CBI should be sent to William
Reisenauer, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite
410, Westbury, NY 11590; phone: 516-228-7301; email:
<a href="/cdn-cgi/l/email-protection#d9aeb0b5b5b0b8b4f7bcf7abbcb0aabcb7b8acbcab99bfb8b8f7beb6af"><span class="__cf_email__" data-cfemail="3e49575252575f53105b104c5b574d5b505f4b5b4c7e585f5f10595148">[email protected]</span></a>. Any commentary that the FAA receives that
is not specifically designated as CBI will be placed in the public
docket for this rulemaking.
Background
The FAA issued AD 2025-14-51, dated July 25, 2025 (AD 2025-14-51),
to address an unsafe condition on certain Bombardier Inc. Model BD-700-
1A10 and BD-700-1A11 airplanes. The FAA sent AD 2025-14-51 to all known
U.S. owners and operators of these airplanes. AD 2025-14-51 requires
installing locking features on the applicable network interfaces.
AD 2025-14-51 was prompted by Transport Canada AD CF-2025-03, dated
January 15, 2025 (Transport Canada AD CF-2025-03) (also referred to as
the MCAI), issued by Transport Canada, which is the aviation authority
for Canada, to correct an unsafe condition on certain serial-numbered
Bombardier Inc. Model BD-700-1A10 and BD-700-1A11 airplanes. The MCAI
specifies installing locking features on certain network interfaces to
prevent unapproved access to these network interfaces.
This AD was prompted by discrepancies in the locking features on
certain network interfaces. The FAA is issuing this AD to address these
discrepancies, which could result in unapproved access to these network
interfaces.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-1327.
[[Page 7114]]
FAA's Determination
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 described above. The FAA is issuing this AD after
determining that the unsafe condition described previously is likely to
exist or develop on other products of the same type design.
AD Requirements
This AD requires installing locking features on the applicable
network interfaces.
Justification for Immediate Adoption and Determination of the Effective
Date
Section 553(b) of the Administrative Procedure Act (APA) (5 U.S.C.
551 et seq.) authorizes agencies to dispense with notice and comment
procedures for rules when the agency, for ``good cause,'' finds that
those procedures are ``impracticable, unnecessary, or contrary to the
public interest.'' Under this section, an agency, upon finding good
cause, may issue a final rule without providing notice and seeking
comment prior to issuance. Further, section 553(d) of the APA
authorizes agencies to make rules effective in less than thirty days,
upon a finding of good cause.
An unsafe condition exists that required the immediate adoption of
AD 2025-14-51, issued on July 10, 2025, to all known U.S. owners and
operators of these airplanes. The FAA found that the risk to the flying
public justified forgoing notice and comment prior to adoption of this
rule because the subject of this AD concerns unauthorized access to
network interfaces of the aircraft. Providing an opportunity to comment
before operators have complied with this action would be detrimental to
transportation security. These conditions still exist, and the AD is
hereby published in the Federal Register as an amendment to 14 CFR
39.13 to make it effective to all persons. Given the significance of
the risk presented by this unsafe condition, it must be immediately
addressed. Accordingly, notice and opportunity for prior public comment
are impracticable and contrary to the public interest pursuant to 5
U.S.C. 553(b).
In addition, the FAA finds that good cause exists pursuant to 5
U.S.C. 553(d) for making this amendment effective in less than 30 days,
for the same reasons the FAA found good cause to forgo notice and
comment.
Regulatory Flexibility Act
The requirements of the Regulatory Flexibility Act (RFA) do not
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt
a rule without prior notice and comment. Because the FAA has determined
that it has good cause to adopt this rule without notice and comment,
RFA analysis is not required.
Costs of Compliance
The FAA estimates that this AD affects 1,313 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs of Required Actions
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Labor cost Parts cost Cost per product operators
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1 work-hour x $85 per hour = $85............................ $802 $887 $1,164,631
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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, and
(2) Will not affect intrastate aviation in Alaska.
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:
2025-14-51 Bombardier Inc.: Amendment 39-23263; Docket No. FAA-2026-
1327; Project Identifier MCAI-2025-00042-T.
(a) Effective Date
The FAA issued Airworthiness Directive (AD) 2025-14-51 on July
10, 2025, directly to affected owners and operators. As a result of
such actual notice, AD 2025-14-51 was effective for those owners and
operators on the date it was received. This AD contains the same
requirements as AD 2025-14-51 and, for those who did not receive
actual notice, is effective on March 4, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to the Bombardier Inc. airplanes, certificated
in any category, listed in paragraphs (c)(1) and (2) of this AD.
(1) Model BD-700-1A10 airplanes, serial numbers 9381, 9432
through 9861 inclusive, 9863 through 9878 inclusive, and 60001
through 61999 inclusive.
(2) Model BD-700-1A11 airplanes, serial numbers 9386, 9401, 9445
through 9862 inclusive, 9868 through 9879 inclusive, and 60007
through 61999 inclusive.
[[Page 7115]]
(d) Subject
Air Transport Association (ATA) of America Code 31, Indicating/
Recording System.
(e) Unsafe Condition
This AD was prompted by discrepancies in the locking features on
certain network interfaces. The FAA is issuing this AD to address
these discrepancies, which could result in unapproved access to
these network interfaces.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Action
Within 6 months after the effective date of this AD, install
locking features on the applicable network interfaces using a method
approved by the Manager, International Validation Branch, FAA.
(h) Credit for Previous Actions
This paragraph provides credit for the actions required by
paragraph (g) of this AD, if those actions were performed before the
effective date of this AD using Bombardier Service Bulletin 700-46-
5008, dated July 20, 2022; Bombardier Service Bulletin 700-46-6008,
dated July 20, 2022; Bombardier Service Bulletin 700-46-5504, dated
July 20, 2022; Bombardier Service Bulletin 700-46-5504, Revision 01,
dated August 22, 2024; Bombardier Service Bulletin 700-46-6504,
dated July 20, 2022; or Bombardier Service Bulletin 700-46-6504,
Revision 01, dated August 22, 2024.
(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)(1) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#793834363a391f1818571e160f"><span class="__cf_email__" data-cfemail="cf8e82808c8fa9aeaee1a8a0b9">[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 Bombardier Inc.'s
Transport Canada Design Approval Organization (DAO). If approved by
the DAO, the approval must include the DAO-authorized signature.
(j) Additional Information
(1) For more information about this AD, contact William
Reisenauer, Aviation Safety Engineer, FAA, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; phone: 516-228-7301; email:
<a href="/cdn-cgi/l/email-protection#64130d08080d05094a014a16010d17010a05110116240205054a030b12"><span class="__cf_email__" data-cfemail="4e39272222272f23602b603c2b273d2b202f3b2b3c0e282f2f60292138">[email protected]</span></a>.
(2) For Bombardier Inc. material identified in this AD that is
not incorporated by reference, contact Bombardier Business Aircraft
Customer Response Center, 400 C[ocirc]te-Vertu Road West, Dorval,
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-2999; email
<a href="/cdn-cgi/l/email-protection#59383a77202c3519383c2b3677653879312b3c3f64" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website <a href="http://bombardier.com">bombardier.com</a>.
(k) Material Incorporated by Reference
None.
Issued on February 12, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-03055 Filed 2-13-26; 8:45 am]
BILLING CODE 4910-13-P
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