Proposed Rule2024-31624
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 6, 2025
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This proposed 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 proposed AD would 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 proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 90 Issue 3 (Monday, January 6, 2025)</title>
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[Federal Register Volume 90, Number 3 (Monday, January 6, 2025)]
[Proposed Rules]
[Pages 578-581]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-31624]
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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]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11
airplanes. This proposed 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 proposed AD
would 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 proposing this AD to address the unsafe condition on these
products.
DATES: The FAA must receive comments on this proposed AD by February
20, 2025.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> 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 NPRM, the mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For Bombardier material identified in this proposed 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#5c3d3f722529301c3d392e3372603d7c342e393a61" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website
<a href="http://bombardier.com">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.
FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#e3dace829590ce8d9a82808cce808c90a3858282cd848c95"><span class="__cf_email__" data-cfemail="526b7f3324217f3c2b33313d7f313d21123433337c353d24">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2024-2720;
Project Identifier MCAI-2024-00129-T'' at the
[[Page 579]]
beginning of your comments. The most helpful comments reference a
specific portion of the proposal, explain the reason for any
recommended change, and include supporting data. The FAA will consider
all comments received by the closing date and may amend the proposal
because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this NPRM.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to
Joseph Catanzaro, Aviation Safety Engineer, FAA, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#82bbafe3f4f1afecfbe3e1edafe1edf1c2e4e3e3ace5edf4"><span class="__cf_email__" data-cfemail="ba8397dbccc997d4c3dbd9d597d9d5c9fadcdbdb94ddd5cc">[email protected]</span></a>. Any commentary that the FAA receives which is not
specifically designated as CBI will be placed in the public docket for
this rulemaking.
Background
Transport Canada, which is the aviation authority for Canada, has
issued Transport Canada AD CF-2024-07, dated February 21, 2024
(Transport Canada AD CF-2024-07) (also referred to as the MCAI), to
correct an unsafe condition on certain Bombardier, Inc., Model BD-700-
1A10 and BD-700-1A11 airplanes. 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.
The FAA is proposing 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
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-2720.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed the following material issued by Bombardier:
<bullet> Service Bulletin 700-29-5502, dated November 29, 2023.
<bullet> Service Bulletin 700-29-6011, dated November 29, 2023.
<bullet> Service Bulletin 700-29-6502, dated November 29, 2023.
This material describes procedures for a borescope inspection for
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.
FAA's Determination
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 and
material referenced above. The FAA is issuing this NPRM after
determining that the unsafe condition described previously is likely to
exist or develop on other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified
in the material already described.
Clarification of Referenced Material
Paragraph 1.A, ``Effectivity'' of Bombardier Service Bulletin 700-
29-5502, dated November 29, 2023, inadvertently identifies ``Model BD-
700-1A10 aircraft,'' instead of ``Model BD-700-1A11 aircraft.''
Paragraph (g)(1) of this proposed AD would require replacing the
incorrect text with the correct text.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 36 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
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Cost on U.S.
Labor cost Parts cost Cost per product 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 = $170. $1,226 $1,396
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[[Page 580]]
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this proposed 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
The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would 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 this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Would not affect intrastate aviation in Alaska, and
(3) Would 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 Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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:
Bombardier, Inc.: Docket No. FAA-2024-2720; Project Identifier MCAI-
2024-00129-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by February 20, 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, whichever occurs first
after the effective date of this AD, do a borescope inspection of
the routing of hydraulic systems number 1, left-hand side (LHS), and
number 2, right-hand side (RHS), 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 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:
<a href="/cdn-cgi/l/email-protection#acede1e3efeccacdcd82cbc3da"><span class="__cf_email__" data-cfemail="c7868a888487a1a6a6e9a0a8b1">[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 Joseph Catanzaro,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#c5fce8a4b3b6e8abbca4a6aae8a6aab685a3a4a4eba2aab3"><span class="__cf_email__" data-cfemail="063f2b6770752b687f6765692b6569754660676728616970">[email protected]</span></a>.
[[Page 581]]
(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 <a href="/cdn-cgi/l/email-protection#6302004d1a160f230206110c4d5f02430b1106055e" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website
<a href="http://bombardier.com">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#583e2a7631362b283d3b2c3137361836392a39763f372e"><span class="__cf_email__" data-cfemail="096f7b2760677a796c6a7d6066674967687b68276e667f">[email protected]</span></a>.
Issued on December 30, 2024.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-31624 Filed 1-3-25; 8:45 am]
BILLING CODE 4910-13-P
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