[Federal Register Volume 90, Number 101 (Wednesday, May 28, 2025)]
[Rules and Regulations]
[Pages 22453-22455]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-09504]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2720; Project Identifier MCAI-2024-00129-T;
Amendment 39-23013; AD 2025-07-11]
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 reports of engine-driven pump hydraulic
pressure hoses for hydraulic systems number 1 and 2 chafing against the
pylon in the aft equipment bay. This AD requires an inspection of the
engine-driven pump pressure hoses for any damage and minimum clearance
between the engine-driven pump hydraulic pressure hose and case drain,
suction pressure hose, and surrounding pylon structure; and corrective
actions if necessary. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective July 2, 2025.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of July 2, 2025.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2024-2720; 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; telephone 514-
855-2999; email bombardier.com">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-2024-2720.
FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7300; email: [email protected].
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 published
in the Federal Register on January 6, 2025 (90 FR 578). The NPRM was
prompted by AD CF-2024-07, dated February 21, 2024 (referred to after
this as ``the MCAI''), issued by Transport Canada, which is the
aviation authority for Canada. The MCAI states that there have been
reports of engine-driven pump hydraulic pressure hoses for hydraulic
systems number 1, left-hand side (LHS), and number 2, right-hand side
(RHS), chafing against the pylon in the aft equipment bay.
In the NPRM, the FAA proposed to require an inspection of the
engine-driven pump pressure hoses for any damage and minimum clearance
between the engine-driven pump hydraulic pressure hose and case drain,
suction pressure hose, and surrounding pylon structure; and corrective
actions if necessary. The FAA is issuing this AD to address the chafing
of the hydraulic systems engine-driven pump hoses against the pylon,
which may lead to hydraulic system leaks and failures and result in the
loss of the affected hydraulic system. Loss of both hydraulic systems
number 1 and 2 would substantially reduce the airplane's functional
capabilities.
You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2024-2720.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of
the cost to the public.
Conclusion
This product has been approved by the aviation authority of another
country and is approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI
referenced above. The FAA reviewed the relevant data and determined
that air safety requires adopting this AD as proposed. Accordingly, the
FAA is issuing this AD to address the unsafe condition on this product.
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 the following material issued by Bombardier:
Service Bulletin 700-29-5502, dated November 29, 2023.
Service Bulletin 700-29-6011, dated November 29, 2023.
Service Bulletin 700-29-6502, dated November 29, 2023.
This material describes procedures for a borescope inspection of
the routing of hydraulic systems number 1, LHS, and number 2, RHS,
engine-driven pump pressure hoses for any damage (including fouling or
chafing) and for minimum clearance between the engine-driven pump
hydraulic pressure hose and case drain, suction pressure hose, and
surrounding pylon structure. Corrective actions include replacing and
adjusting the pressure hoses. These documents are distinct since they
apply to different airplane models. 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 36 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
[[Page 22454]]
Estimated Costs for Required Actions
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Labor cost Parts cost Cost per product Cost on U.S. operators
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2 work-hours x $85 per hour = $170............ $0 $170 $6,120
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The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need these on-condition actions:
Estimated Costs of On-Condition Actions
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Labor cost Parts cost Cost per product
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2 work-hours x $85 per hour = $1,226 $1,396
$170...........................
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this AD may be covered under warranty, thereby reducing the cost impact
on affected operators.
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
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:
2025-07-11 Bombardier, Inc.: Amendment 39-23013; Docket No. FAA-
2024-2720; Project Identifier MCAI-2024-00129-T.
(a) Effective Date
This airworthiness directive (AD) is effective July 2, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-
700-1A11 airplanes, certificated in any category, serial numbers (S/
Ns) 60001 through 60076 inclusive, 60083, 60087, and 60089.
(d) Subject
Air Transport Association (ATA) of America Code 29, Hydraulic
Power.
(e) Unsafe Condition
This AD was prompted by reports of engine-driven pump hydraulic
pressure hoses for hydraulic systems number 1 and 2 chafing against
the pylon in the aft equipment bay. The FAA is issuing this AD to
address the chafing of the hydraulic systems engine-driven pump
hydraulic pressure hoses for the hydraulic system against the pylon,
which may lead to hydraulic system leaks and failures and result in
the loss of the affected hydraulic system. Loss of both hydraulic
systems number 1 and 2 would substantially reduce the airplane's
functional capabilities.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection of Engine-Driven Pump Hydraulic Hoses
Within 500 flight hours or 18 months after the effective date of
this AD, whichever occurs first, do a borescope inspection of the
routing of hydraulic systems number 1, left-hand side, and number 2,
right-hand side, engine-driven pump pressure hoses over the length
of the hoses for any damage and for minimum clearance between the
engine-driven pump hydraulic pressure hose and case drain, suction
pressure hose, and surrounding pylon structure, in accordance with
section 2.B. of the Accomplishment Instructions of the applicable
service information identified in paragraph (g)(1) through (3) of
this AD.
(1) For airplanes identified in Bombardier Service Bulletin 700-
29-5502, dated November 29, 2023: Bombardier Service Bulletin 700-
29-5502, dated November 29, 2023. Where paragraph 1.A. of Bombardier
Service Bulletin 700-29-5502, dated November 29, 2023, identifies
``Model BD-700-1A10 aircraft,'' this AD requires replacing that text
with ``Model BD-700-1A11 aircraft.''
(2) For airplanes identified in Bombardier Service Bulletin 700-
29-6011, dated November 29, 2023: Bombardier Service Bulletin 700-
29-6011, dated November 29, 2023.
(3) For airplanes identified in Bombardier Service Bulletin 700-
29-6502, dated November 29, 2023: Bombardier Service Bulletin 700-
29-6502, dated November 29, 2023.
(h) Corrective Actions
(1) If clearance is found to be less than 0.500 inch (12.70 mm)
during the inspection required by paragraph (g) of this AD: Before
further flight, adjust the applicable hose(s) to
[[Page 22455]]
obtain minimum clearance between the engine-driven pump hydraulic
pressure hose and case drain, suction pressure hose, and surrounding
pylon structure, in accordance with section 2.C. of the
Accomplishment Instructions of the applicable service information
identified in paragraphs (g)(1) through (3) of this AD.
(2) If any damage (including fouling or chafing) is found during
the inspection required by paragraph (g) of this AD: Before further
flight, replace all damaged pressure hoses, in accordance with
section 2.D. of the Accomplishment Instructions of the applicable
service information identified in paragraphs (g)(1) through (3) 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:
[email protected]. 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 Joseph Catanzaro,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 516-228-7300; email: [email protected].
(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) Bombardier Service Bulletin 700-29-5502, dated November 29,
2023.
(ii) Bombardier Service Bulletin 700-29-6011, dated November 29,
2023.
(iii) Bombardier Service Bulletin 700-29-6502, dated November
29, 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 bombardier.com">ac.yul@aero.bombardier.com; website
bombardier.com.
(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 www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].
Issued on April 3, 2025.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2025-09504 Filed 5-27-25; 8:45 am]
BILLING CODE 4910-13-P