Rule2025-22642
Airworthiness Directives; MHI RJ Aviation ULC (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
December 12, 2025
Effective
January 16, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for all MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) 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 90 Issue 237 (Friday, December 12, 2025)</title>
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[Federal Register Volume 90, Number 237 (Friday, December 12, 2025)]
[Rules and Regulations]
[Pages 57680-57683]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-22642]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-2261; Project Identifier MCAI-2024-00717-T;
Amendment 39-23211; AD 2025-25-03]
RIN 2120-AA64
Airworthiness Directives; MHI RJ Aviation ULC (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
MHI
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RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702),
CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series
705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional
Jet Series 1000) 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 January 16, 2026.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of January 16,
2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-2261; 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#9fcbdcb1def6ede8f0edebf7f6f1faececdbf6edfafcebf6e9faecb2dcf0f1ecf6f8f1faecfbfaf1fee9f6f8fefdf6f3f6ebfab1cbdcdfebfcb1f8fcb1fcfe"><span class="__cf_email__" data-cfemail="f1a5b2dfb09883869e838599989f948282b5988394928598879482dcb29e9f8298969f948295949f908798969093989d988594dfa5b2b18592df9692df9290">[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-2025-2261.
FOR FURTHER INFORMATION CONTACT: Fatin Saumik, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#f1c8dc908782dc9f8890929edc929e82b1979090df969e87"><span class="__cf_email__" data-cfemail="f2cbdf938481df9c8b93919ddf919d81b2949393dc959d84">[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 MHI RJ Aviation ULC
Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11
(Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-
600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet
Series 1000) airplanes. The NPRM was published in the Federal Register
on August 21, 2025 (90 FR 40780). The NPRM was prompted by AD CF-2024-
41, dated December 5, 2024 (Transport Canada AD CF-2024-41) (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 require revising the existing
maintenance or inspection program, as applicable, to incorporate new or
more restrictive airworthiness limitations, as specified in Transport
Canada AD CF-2024-41. The FAA is issuing this AD to address reduced
structural integrity and reduced controllability 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-2025-2261.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from Air Line Pilots Association,
International (ALPA) 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
The FAA reviewed Transport Canada AD CF-2024-41, which specifies
new or more restrictive airworthiness limitations for airplane
structures and safe life limits.
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 600 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
The FAA has determined that revising the existing 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.
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
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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:
2025-25-03 MHI RJ Aviation ULC (Type Certificate Previously Held by
Bombardier, Inc.): Amendment 39-23211; Docket No. FAA-2025-2261;
Project Identifier MCAI-2024-00717-T.
(a) Effective Date
This airworthiness directive (AD) is effective January 16, 2026.
(b) Affected ADs
This AD affects the ADs specified in paragraphs (b)(1) through
(4) of this AD.
(1) AD 2023-06-06, Amendment 39-22392 (88 FR 17682, March 24,
2023); corrected April 12, 2023 (88 FR 21900) (AD 2023-06-06).
(2) AD 2023-09-02, Amendment 39-22425 (88 FR 32625, May 22,
2023) (AD 2023-09-02).
(3) AD 2023-24-03, Amendment 39-22619 (88 FR 87331, December 18,
2023) (AD 2023-24-03).
(4) AD 2025-11-11, Amendment 39-23057 (90 FR 24315, June 10,
2025) (AD 2025-11-11).
(c) Applicability
This AD applies to all MHI RJ Aviation ULC (Type Certificate
previously held by Bombardier, Inc.) airplanes, certificated in any
category, identified in paragraphs (c)(1) through (5) of this AD.
(1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702)
airplanes.
(2) Model CL-600-2C11 (Regional Jet Series 550) airplanes.
(3) Model CL-600-2D15 (Regional Jet Series 705) airplanes.
(4) Model CL-600-2D24 (Regional Jet Series 900) airplanes.
(5) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
(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 reduced structural integrity and reduced
controllability of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Maintenance or Inspection Program Revision
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-2024-41, dated December 5,
2024 (Transport Canada AD CF-2024-41).
(h) Exception to Transport Canada AD CF-2024-41
(1) Where Transport Canada AD CF-2024-41 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2024-41 specifies to ``complete
the new or more restrictive limitations contained in the MHIRJ MRM
CSP B-053 Part 2, revision 27, dated 15 September 2023, as
applicable to the aeroplane model and configuration within the
thresholds and repeat intervals or discard time identified within
the tasks'', this AD requires replacing that text with ``revise the
existing maintenance or inspection program, as applicable, by
incorporating the information specified in MHIRJ MRM CSP B-053 Part
2, Revision 27, dated September 15, 2023, except when incorporating
Appendix A2, only incorporate the AMM tasks, including the interval
limitation, specified in the limitations table in Appendix A2''.
(3) The initial compliance time for doing the tasks specified in
the ``Corrective Actions'' section of Transport Canada AD CF-2024-41
is at the applicable time specified in paragraph (h)(3)(i) or (ii)
of this AD.
(i) For tasks that have ``thresholds'' and ``discard times''
specified: The initial compliance time is at the applicable
``thresholds'' and ``discard times'' as specified in the material
referenced in Transport Canada AD CF-2024-41, or within 30 days
after the effective date of this AD, whichever occurs later.
(ii) For tasks that only have ``intervals'' specified: The
initial compliance time is before the applicable interval limitation
specified in the material referenced in Transport Canada AD CF-2024-
41 since the date of issuance of the original airworthiness
certificate or the original export certificate of airworthiness, or
within 30 days after the effective date of this AD, whichever occurs
later.
(i) Provisions for Alternative Actions, Intervals, and Critical Design
Configuration Control Limitations (CDCCLs)
After the existing maintenance or inspection program has been
revised as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections), intervals, and CDCCLs are allowed
unless they are approved as specified in the provisions of the
``Corrective Actions'' section of Transport Canada AD CF-2024-41.
(j) Terminating Action for Certain Tasks Required by Other ADs
Accomplishing the actions required by this AD terminates the
corresponding requirements of paragraph (h) of AD 2023-09-02 and
paragraph (h) of AD 2023-24-03 for the AMM tasks identified in the
material referenced in Transport Canada AD CF-2024-41 only.
(k) Terminating Action for AD 2023-06-06 and AD 2025-11-11
Accomplishing the actions required by this AD terminates all
requirements of AD 2023-06-06 and AD 2025-11-11.
(l) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
International Validation Branch, 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 (m) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#3a7b7775797a5c5b5b145d554c"><span class="__cf_email__" data-cfemail="f1b0bcbeb2b1979090df969e87">[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 MHI RJ Aviation
ULC's Transport Canada Design Approval Organization (DAO). If
approved by the DAO, the approval must include the DAO-authorized
signature.
(m) Additional Information
For more information about this AD, contact Fatin Saumik,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#457c68243336682b3c24262a68262a36052324246b222a33"><span class="__cf_email__" data-cfemail="576e7a3621247a392e3634387a3438241731363679303821">[email protected]</span></a>.
(n) 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-2024-41, dated December 5, 2024.
(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#80d4c3aec1e9f2f7eff2f4e8e9eee5f3f3c4e9f2e5e3f4e9f6e5f3adc3efeef3e9e7eee5f3e4e5eee1f6e9e7e1e2e9ece9f4e5aed4c3c0f4e3aee7e3aee3e1"><span class="__cf_email__" data-cfemail="faaeb9d4bb93888d95888e9293949f8989be93889f998e938c9f89d7b9959489939d949f899e9f949b8c939d9b989396938e9fd4aeb9ba8e99d49d99d4999b">[email protected]</span></a>. You
[[Page 57683]]
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#c6a0b4e8afa8b5b6a3a5b2afa9a886a8a7b4a7e8a1a9b0"><span class="__cf_email__" data-cfemail="d2b4a0fcbbbca1a2b7b1a6bbbdbc92bcb3a0b3fcb5bda4">[email protected]</span></a>.
Issued on December 5, 2025.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2025-22642 Filed 12-11-25; 8:45 am]
BILLING CODE 4910-13-P
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