Rule2026-08032
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
April 24, 2026
Effective
May 29, 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. This AD was prompted by a determination that the approach speed adders and landing distance factors must be corrected in the airplane flight manual (AFM) tables in the non-normal procedure for the SLAT FAIL (Caution) crew alerting system (CAS) message. This AD requires revising the existing AFM to provide the flightcrew with the correct approach speed adders and landing distance factors for the non-normal procedures for the SLAT FAIL (Caution) CAS message. 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 79 (Friday, April 24, 2026)</title>
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[Federal Register Volume 91, Number 79 (Friday, April 24, 2026)]
[Rules and Regulations]
[Pages 21950-21952]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-08032]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2026-0727; Project Identifier MCAI-2025-01659-T;
Amendment 39-23312; AD 2026-08-04]
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
certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
This AD was prompted by a determination that the approach speed adders
and landing distance factors must be corrected in the airplane flight
manual (AFM) tables in the non-normal procedure for the SLAT FAIL
(Caution) crew alerting system (CAS) message. This AD requires revising
the existing AFM to provide the flightcrew with the correct approach
speed adders and landing distance factors for the non-normal procedures
for the SLAT FAIL (Caution) CAS message. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective May 29, 2026.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 29,
2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2026-0727; 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
[[Page 21951]]
Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-3639; email
<a href="/cdn-cgi/l/email-protection#6531264b240c17120a17110d0c0b001616210c170006110c13001648260a0b160c020b001601000b04130c0204070c090c11004b31262511064b02064b0604"><span class="__cf_email__" data-cfemail="6b3f28452a02191c04191f0302050e18182f02190e081f021d0e184628040518020c050e180f0e050a1d020c0a090207021f0e453f282b1f08450c0845080a">[email protected]</span></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-2026-0727.
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#360f1b5740451b584f5755591b5559457650575718515940"><span class="__cf_email__" data-cfemail="f0c9dd918683dd9e8991939fdd939f83b0969191de979f86">[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 certain Bombardier,
Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. The NPRM was
published in the Federal Register on January 27, 2026 (91 FR 3397). The
NPRM was prompted by AD CF-2025-53, dated November 11, 2025 (Transport
Canada AD CF-2025-53) (also referred to as the MCAI), issued by
Transport Canada, which is the aviation authority for Canada. The MCAI
states that Bombardier has determined that the approach speed adders
and landing distance factors in the AFM tables in the non-normal
procedure for the SLAT FAIL (Caution) CAS message require correction.
If not addressed, the incorrect approach speed adders for the SLAT FAIL
(Caution) non-normal procedure could result in a reduced maneuvering
margin to stick shaker activation, failing to provide the margins
assumed during the airplane's initial certification. This condition may
adversely affect the safe operation of the airplane and increase
flightcrew workload due to an unexpected stall warning and stick shaker
activation.
In the NPRM, the FAA proposed to require revising the existing AFM
to provide the flightcrew with the correct approach speed adders and
landing distance factors for the non-normal procedures for the SLAT
FAIL (Caution) CAS message, as specified in Transport Canada AD CF-
2025-53. 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-2026-0727.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from a commenter who supported the NPRM
without change.
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
Transport Canada AD CF-2025-53 specifies procedures for revising
the AFM to correct the approach speed adders and landing distance
factors in the AFM tables in the non-normal procedures for the SLAT
FAIL (Caution) CAS message. 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 925 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Labor cost Parts cost product operators
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1 work-hour x $85 per hour = $85............................. $0 $85 $78,625
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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,
(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:
[[Page 21952]]
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:
2026-08-04 Bombardier, Inc.: Amendment 39-23312; Docket No. FAA-
2026-0727; Project Identifier MCAI-2025-01659-T.
(a) Effective Date
This airworthiness directive (AD) is effective May 29, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to certain Bombardier, Inc., Model BD-700-1A10
and BD-700-1A11 airplanes, certificated in any category, as
identified in Transport Canada AD CF-2025-53, dated November 11,
2025 (Transport Canada AD CF-2025-53) except serial number 9001.
(d) Subject
Air Transport Association (ATA) of America Code 27, Flight
Controls.
(e) Unsafe Condition
This AD was prompted by a determination that the approach speed
adders and landing distance factors must be corrected in the
airplane flight manual (AFM) tables in the non-normal procedure for
the SLAT FAIL (Caution) crew alerting system (CAS) message. The FAA
is issuing this AD to correct the approach speed adders and landing
distance factors for the SLAT FAIL (Caution) non-normal procedure.
The unsafe condition, if not corrected, could lead to a reduced
maneuvering margin to stick shaker (stall warning) activation, which
could increase flightcrew workload due to an unexpected stall
warning and could adversely affect the safe operation of the
airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Requirements
Except as specified in paragraph (h) of this AD: Comply with all
required actions and compliance times specified in, and in
accordance with, Transport Canada AD CF-2025-53.
(h) Exceptions to Transport Canada AD CF-2025-53
(1) Where Transport Canada AD CF-2025-53 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where paragraph B of Transport Canada AD CF-2025-53
specifies to ``Advise all flight crews of the changes introduced by
the approved Transport Canada AFM procedures listed above and
thereafter operate the aeroplane accordingly,'' this AD does not
require those actions as those actions are already required by
existing FAA operating regulations (see 14 CFR 91.9, 91.505, and
121.137).
(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#92d3dfddd1d2f4f3f3bcf5fde4"><span class="__cf_email__" data-cfemail="1e5f53515d5e787f7f30797168">[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#d3eafeb2a5a0febdaab2b0bcfeb0bca093b5b2b2fdb4bca5"><span class="__cf_email__" data-cfemail="83baaee2f5f0aeedfae2e0ecaee0ecf0c3e5e2e2ade4ecf5">[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) Transport Canada AD CF-2025-53, dated November 11, 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#5105127f103823263e232539383f342222153823343225382734227c123e3f2238363f342235343f302738363033383d3825347f05121125327f36327f3230"><span class="__cf_email__" data-cfemail="f3a7b0ddb29a81849c81879b9a9d968080b79a819690879a859680deb09c9d809a949d968097969d92859a9492919a9f9a8796dda7b0b38790dd9490dd9092">[email protected]</span></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#e38591cd8a8d90938680978a8c8da38d829182cd848c95"><span class="__cf_email__" data-cfemail="cdabbfe3a4a3bebda8aeb9a4a2a38da3acbface3aaa2bb">[email protected]</span></a>.
Issued on April 13, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-08032 Filed 4-23-26; 8:45 am]
BILLING CODE 4910-13-P
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