DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-0016; Project Identifier MCAI-2023-01047-T;
Amendment 39-23025; AD 2025-09-04]
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 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 June 6, 2025.

The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of June 6, 2025.

ADDRESSES:

AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2025-0016; 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:

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; phone 514-855-
2999; email ac.yul@aero.bombardier.com; website bombardier.com.

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 regulations.gov under
Docket No. FAA-2025-0016.

FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-
228-7300; email: 9-avs-nyaco-cos@faa.gov.

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 February 4, 2025 (90 FR 8915). The NPRM was
prompted by AD CF-2023-65, dated October 3, 2023, issued by Transport
Canada, which is the aviation authority for Canada (also referred to as
"the MCAI"). 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. The FAA is issuing this AD
to address new or more restrictive airworthiness limitations. Failure
to adhere to the specified airworthiness limitations could adversely
affect the stability and controllability of the airplane on landing and
could result in damage to the airplane.

You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2025-0016.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the costs.

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.

Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed the following Bombardier documents:
Part 2, "Airworthiness Limitations," of Bombardier
Global Express Time Limits/Maintenance Checks (TLMC), Publication No.
BD-700 TLMC, Revision 35, dated December 19, 2023. (For obtaining this
part of Bombardier Global Express TLMC, Publication No. BD-700 TLMC,
use Document Identification No. GL 700 TLMC.)

Part 2, "Airworthiness Limitations," of Bombardier
Global Express XRS TLMC, Publication No. BD-700 XRS TLMC, Revision 22,
dated December 19, 2023. (For obtaining this part of Bombardier Global
Express XRS TLMC, Publication No. BD-700 XRS TLMC, use Document
Identification No. GL XRS TLMC.)

Part 2, "Airworthiness Limitations," of Bombardier
Global 6000 TLMC, Publication No. GL 6000 TLMC, Revision 16, dated
December 19, 2023.

Part 2, "Airworthiness Limitations," of Bombardier
Global 6500 TLMC, Publication No. GL 6500 TLMC, Revision 5, dated
December 19, 2023.

Part 2, "Airworthiness Limitations," of Bombardier
Global 5000 TLMC, Publication No. BD-700 TLMC, Revision 26, dated
December 19, 2023. (For obtaining this part of Bombardier Global 5000
TLMC, Publication No. BD-700 TLMC, use Document Identification No. GL
5000 TLMC.)

Part 2, "Airworthiness Limitations," of Bombardier
Global 5500 TLMC, Publication No. GL 5500 TLMC, Revision 5, dated
December 19, 2023.

Part 2, "Airworthiness Limitations," of Bombardier
Global 5000 Featuring Global Vision Flight Deck TLMC, Publication No.
GL 5000 GVFD TLMC, Revision 16, dated December 19, 2023.

This material specifies new or more restrictive airworthiness
limitations for safe life limits (for certain main landing gear and
nose landing gear components) and certification maintenance
requirements (for the shock strut axle and service door, pitch trim
actuator, and nose landing gear shock-strut
assembly to retraction-actuator main-fitting joint). These documents
are distinct since they apply to different airplane models in different
configurations. 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 484 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.

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

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]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive: