Rule2026-00841
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
January 16, 2026
Effective
February 20, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. 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 11 (Friday, January 16, 2026)</title>
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[Federal Register Volume 91, Number 11 (Friday, January 16, 2026)]
[Rules and Regulations]
[Pages 2075-2077]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-00841]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-0751; Project Identifier MCAI-2024-00305-T;
Amendment 39-23235; AD 2026-01-07]
RIN 2120-AA64
Airworthiness Directives; 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
Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by
a determination that new or more restrictive airworthiness limitations
are necessary. This AD requires revising the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive airworthiness limitations. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective February 20, 2026.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of February 20,
2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-0751; 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 Bombardier material identified in this AD, 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#c6a7a5e8bfb3aa86a7a3b4a9e8a4a9aba4a7b4a2afa3b4e8a5a9ab"><span class="__cf_email__" data-cfemail="d8b9bbf6a1adb498b9bdaab7f6bab7b5bab9aabcb1bdaaf6bbb7b5">[email protected]</span></a>; website <a href="http://my.bombardier.com">my.bombardier.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-2025-0751.
FOR FURTHER INFORMATION CONTACT: John Massey, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-
228-7300; email: <a href="/cdn-cgi/l/email-protection#b38a9ed2c5c09eddcad2d0dc9ed0dcc0f3d5d2d29dd4dcc5"><span class="__cf_email__" data-cfemail="60594d0116134d0e1901030f4d030f13200601014e070f16">[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 Bombardier, Inc.,
Model BD-100-1A10 airplanes. The NPRM was published in the Federal
Register on May 7, 2025 (90 FR 19264). The NPRM was prompted by AD CF-
2024-17, dated May 23, 2024 (also referred to as the MCAI), issued by
Transport Canada, which is the aviation authority for Canada. The MCAI
states that new or more restrictive airworthiness limitations have been
developed.
In the NPRM, the FAA proposed to revise the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive airworthiness limitations. The FAA is issuing this AD to
address potential structural, control system, and navigational system
failures. The unsafe condition, if not addressed, could result in loss
of control of the airplane.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-0751.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from an anonymous commenter and
[[Page 2076]]
Bombardier. The anonymous commenter expressed appreciation for the
length of the comment period. The following presents Bombardier's
comments to the NPRM and the FAA's response.
Request To Revise Website Address
Bombardier recommended that the FAA change Bombardier's website
address in the proposed AD to <a href="http://my.bombardier.com/">http://my.bombardier.com/</a>. The commenter
noted that this address is a direct and secure link to the Bombardier
customer portal where the material that would be required by the
proposed AD can be obtained. Bombardier stated that certain persons may
have difficulty locating the Bombardier customer portal using the
address provided in the proposed AD.
The FAA partially agrees and has instead changed the website
address to ``<a href="http://my.bombardier.com">my.bombardier.com</a>'' in this AD. The FAA notes this address
redirects users to Bombardier's secure customer portal.
Request To Revise the Unsafe Condition
Bombardier requested that the FAA revise the unsafe condition of
the proposed AD to state the FAA is proposing this AD to address any
potential unsafe condition that could arise from non-compliance with
the new or more restrictive limitations. Bombardier did not provide
justification for the suggested change.
The FAA disagrees. The FAA must provide operators with notice of
any potential unsafe condition and the end-level effect of the unsafe
condition. In ADs for airworthiness limitations, the unsafe condition
typically includes a summary of the affected systems or parts addressed
by the airworthiness limitations. In the case of this AD, the new or
more restrictive airworthiness limitations required by this AD address
structural, control system, and navigational system failures. The FAA
has not changed this AD in this regard.
Request To Allow Use of Later Revisions of the Service Information
Bombardier requested that the FAA revise paragraphs (g)(1) and (2)
of the proposed AD to allow later revisions of the service information
to be used for compliance.
The FAA agrees to revise paragraph (g) of this AD to clarify that
using a later revision of Part 2, ``Airworthiness Limitations,''
Bombardier Challenger 300 Time Limits/Maintenance Checks (TLMC),
Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023; and
Part 2, ``Airworthiness Limitations,'' Bombardier Challenger 350 TLMC,
Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023; as
applicable, is acceptable for compliance with the requirements of
paragraph (g) of this AD, provided that the information in the later
revision is identical to that contained in Part 2, ``Airworthiness
Limitations,'' of the applicable TLMC manual. As long as the
information in the later revision of the applicable TLMC manual is
identical, an operator can show compliance with those airworthiness
limitations without having to request an alternative method of
compliance (AMOC) under the provisions of paragraph (i)(1) of this AD.
Request To Not Publish the Required Service Information
Bombardier stated that it considers Bombardier Challenger 300 Time
Limits/Maintenance Checks (TLMC), Publication No. CH 300 TLMC, and
Bombardier Challenger 350 TLMC, Publication No. CH 350 TLMC, and all
associated temporary revisions to both TLMCs, to be confidential
business information (CBI) or proprietary information (PROPIN).
The FAA infers that Bombardier requests the FAA refrain from
publishing in the AD docket the service information that is required
for compliance with this AD. The FAA disagrees. The FAA clarifies that
the CBI section of the NPRM applies only to information submitted by a
commenter as part of their comment, and not to documents required for
compliance. Under 44 U.S.C. 3101 and 3105, the FAA is required to
create and preserve records and establish safeguards against removal or
loss of records. These statutes apply to the FAA's AD rulemaking
activities. Accordingly, the AD docket in <a href="http://regulations.gov">regulations.gov</a> is the FAA's
official repository for preserving all records for its AD rulemaking
activity, which includes materials incorporated by reference.
Additionally, placing this information in the docket on <a href="http://regulations.gov">regulations.gov</a>
also serves to further enhance the agency's efforts to comply with the
E-Government Act of 2002, which requires agencies, to the extent
practicable, to ``ensure that a publicly accessible Federal Government
website contains electronic dockets for rulemakings under 5 U.S.C.
553.'' That statute further states that these electronic dockets
``shall make publicly available online, to the extent practicable, . .
. other materials that by agency rule or practice are included in the
rulemaking docket.'' The FAA has not changed this AD in this regard.
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, 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 the following Bombardier documents:
<bullet> Part 2, ``Airworthiness Limitations,'' of Bombardier
Challenger 300 TLMC, Publication No. CH 300 TLMC, Revision 24, dated
August 9, 2023.
<bullet> Part 2, ``Airworthiness Limitations,'' of Bombardier
Challenger 350 TLMC, Publication No. CH 350 TLMC, Revision 14, dated
August 9, 2023.
This material is reasonably available because the interested
parties have access to it through their normal course of business or by
the means identified in the ADDRESSES section.
Costs of Compliance
The FAA estimates that this AD affects 782 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
agency recognizes that this number may vary from operator to operator.
Since operators incorporate maintenance or inspection program changes
for their affected fleet(s), the FAA has determined that a per-operator
estimate is more accurate than a per-airplane estimate. Therefore, the
agency estimates the average total cost per operator to be $7,650 (90
work-hours x $85 per work-hour).
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.
[[Page 2077]]
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:
2026-01-07 Bombardier, Inc.: Amendment 39-23235; Docket No. FAA-
2025-0751; Project Identifier MCAI-2024-00305-T.
(a) Effective Date
This airworthiness directive (AD) is effective February 20,
2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks.
(e) Unsafe Condition
This AD was prompted by a determination that new or more
restrictive airworthiness limitations are necessary. The FAA is
issuing this AD to address potential structural, control system, and
navigational system failures. The unsafe condition, if not
addressed, could result in loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Maintenance or Inspection Program Revision
Within 90 days after the effective date of this AD, revise the
existing maintenance or inspection program, as applicable, to
incorporate the information specified in Part 2, ``Airworthiness
Limitations,'' of the applicable time limits/maintenance checks
(TLMC) manual identified in paragraph (g)(1) or (2) of this AD. The
initial compliance time for doing the tasks specified in Part 2,
``Airworthiness Limitations,'' of the applicable TLMC manual
identified in paragraph (g)(1) or (2) of this AD is at the time
specified in the applicable TLMC manual, or within 90 days after the
effective date of this AD, whichever occurs later. Using a later
revision of Part 2, ``Airworthiness Limitations,'' of the applicable
TLMC manual with information identical to the material listed in
paragraph (g)(1) or (2) of this AD, as applicable, is acceptable for
compliance with the requirements of this paragraph.
(1) For Model BD-100-1A10 airplanes having serial numbers (S/Ns)
20003 through 20457 inclusive: Bombardier Challenger 300 TLMC,
Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023.
(2) For Model BD-100-1A10 airplanes having S/Ns 20501 through
21399 inclusive: Bombardier Challenger 350 TLMC, Publication No. CH
350 TLMC, Revision 14, dated August 9, 2023.
(h) No Alternative Actions or Intervals
After the existing maintenance or inspection program has been
revised as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections) or intervals, may be used unless the
actions or intervals are approved as an alternative method of
compliance (AMOC) in accordance with the procedures specified in
paragraph (i)(1) of this AD.
(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#a5e4e8eae6e5c3c4c48bc2cad3"><span class="__cf_email__" data-cfemail="f3b2bebcb0b3959292dd949c85">[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
For more information about this AD, contact John Massey,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#5f66723e292c7231263e3c30723c302c1f393e3e71383029"><span class="__cf_email__" data-cfemail="0e37236f787d2360776f6d61236d617d4e686f6f20696178">[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) Part 2, ``Airworthiness Limitations,'' of Bombardier
Challenger 300 Time Limits/Maintenance Check (TLMC), Publication No.
CH 300 TLMC, Revision 24, dated August 9, 2023.
(ii) Part 2, ``Airworthiness Limitations,'' of Bombardier
Challenger 350 TLMC, Publication No. CH 350 TLMC, Revision 14, dated
August 9, 2023.
(3) For Bombardier material identified in this AD, 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#0263612c7b776e426367706d2c606d6f606370666b67702c616d6f"><span class="__cf_email__" data-cfemail="6b0a0845121e072b0a0e190445090406090a190f020e1945080406">[email protected]</span></a>; website
<a href="http://my.bombardier.com">my.bombardier.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#bfd9cd91d6d1cccfdadccbd6d0d1ffd1decdde91d8d0c9"><span class="__cf_email__" data-cfemail="fb9d89d59295888b9e988f929495bb959a899ad59c948d">[email protected]</span></a>.
Issued on January 13, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-00841 Filed 1-15-26; 8:45 am]
BILLING CODE 4910-13-P
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