Proposed Rule2024-30310
Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); 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 20, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A11 airplanes. This proposed AD was prompted by an investigation of an in- service hydraulic fluid leakage event that indicated the potential use of an uncalibrated torque wrench when tightening the union fittings at the pressure and return interfaces of all three rudder hydraulic power control units (PCUs). This proposed AD would require properly torquing the rudder PCU hydraulic fittings and applying the torque seal on the rudder PCU hydraulic fittings, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 245 (Friday, December 20, 2024)</title>
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[Federal Register Volume 89, Number 245 (Friday, December 20, 2024)]
[Proposed Rules]
[Pages 104067-104069]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-30310]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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Federal Register / Vol. 89, No. 245 / Friday, December 20, 2024 /
Proposed Rules
[[Page 104067]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2666; Project Identifier MCAI-2024-00261-T]
RIN 2120-AA64
Airworthiness Directives; Airbus Canada Limited Partnership (Type
Certificate Previously Held by C Series Aircraft Limited Partnership
(CSALP); 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 Airbus Canada Limited Partnership Model BD-500-1A11
airplanes. This proposed AD was prompted by an investigation of an in-
service hydraulic fluid leakage event that indicated the potential use
of an uncalibrated torque wrench when tightening the union fittings at
the pressure and return interfaces of all three rudder hydraulic power
control units (PCUs). This proposed AD would require properly torquing
the rudder PCU hydraulic fittings and applying the torque seal on the
rudder PCU hydraulic fittings, as specified in a Transport Canada AD,
which is proposed for incorporation by reference (IBR). 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 3,
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-2024-2666; 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 Transport Canada material identified in this proposed
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#a2f6e18ce3cbd0d5cdd0d6cacbccc7d1d1e6cbd0c7c1d6cbd4c7d18fe1cdccd1cbc5ccc7d1c6c7ccc3d4cbc5c3c0cbcecbd6c78cf6e1e2d6c18cc5c18cc1c3"><span class="__cf_email__" data-cfemail="194d5a3758706b6e766b6d7170777c6a6a5d706b7c7a6d706f7c6a345a76776a707e777c6a7d7c77786f707e787b7075706d7c374d5a596d7a377e7a377a78">[email protected]</span></a>. You may find this material on the
Transport Canada website at tc.canada.ca/en/aviation. It is also
available at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-2666.
<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: Brenda Buitrago Perez, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#40796d2136336d2e3921232f6d232f33002621216e272f36"><span class="__cf_email__" data-cfemail="162f3b7760653b786f7775793b7579655670777738717960">[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-2024-2666;
Project Identifier MCAI-2024-00261-T'' at the 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 this 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
Brenda Buitrago Perez, Aviation Safety Engineer, FAA, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228 7300; email <a href="/cdn-cgi/l/email-protection#0d34206c7b7e2063746c6e62206e627e4d6b6c6c236a627b"><span class="__cf_email__" data-cfemail="063f2b6770752b687f6765692b6569754660676728616970">[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-2024-13, dated April 29, 2024 (Transport
Canada AD CF-2024-13) (also referred to as the MCAI), to correct an
unsafe condition for certain Airbus Canada Limited Partnership Model
BD-500-1A11 airplanes. The MCAI states an investigation of an in-
service leakage event indicated the potential use of an uncalibrated
torque wrench when tightening the union fittings at the pressure and
return interfaces of all three rudder PCUs. If not corrected, this
condition could cause the union fittings to come loose and leak,
resulting in the
[[Page 104068]]
potential loss of one or more hydraulic systems.
The FAA is proposing 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-2024-2666.
Material Incorporated by Reference Under 1 CFR Part 51
Transport Canada AD CF-2024-13 specifies procedures for properly
torquing the rudder PCU hydraulic fittings and applying the torque seal
on the rudder PCU hydraulic fittings, which includes cleaning any leaks
at the coil B-nut connections, performing a visual inspection for
hydraulic leaks for all rudder PCU coil tube fittings and repair. The
repair includes tightening the nut to the specified torque, testing for
leakage limits, and replacing any defective components. 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
referenced above. The FAA is issuing this NPRM after determining that
the unsafe condition described previously is likely to exist or develop
in other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified
in Transport Canada AD CF-2024-13 described previously, except for any
differences identified as exceptions in the regulatory text of this
proposed AD.
Explanation of Required Compliance Information
In the FAA's ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use some civil aviation
authority (CAA) ADs as the primary source of information for compliance
with requirements for corresponding FAA ADs. The FAA has been
coordinating this process with manufacturers and CAAs. As a result, the
FAA proposes to incorporate Transport Canada AD CF-2024-13 by reference
in the FAA final rule. This proposed AD would, therefore, require
compliance with Transport Canada AD CF-2024-13 in its entirety through
that incorporation, except for any differences identified as exceptions
in the regulatory text of this proposed AD. Material required by
Transport Canada AD CF-2024-13 for compliance will be available at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2024-2666 after the FAA final rule
is published.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 5 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 9 work-hours x $85 per hour = Up to $0 *............. Up to $765............. Up to $3,825.
Up to $765.
----------------------------------------------------------------------------------------------------------------
* The FAA has received no definitive data on which to base the cost estimates for the replacement cost.
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:
Airbus Canada Limited Partnership (Type Certificate Previously Held
by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.):
Docket No. FAA-2024-2666; Project Identifier MCAI-2024-00261-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by February 3, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Airbus Canada Limited Partnership (Type
Certificate previously held by C Series Aircraft Limited Partnership
(CSALP); Bombardier, Inc.) Model BD-500-1A11 airplanes, certificated
in any category, as identified in Transport Canada AD CF-
[[Page 104069]]
2024-13, dated April 29, 2024 (Transport Canada AD CF-2024-13).
(d) Subject
Air Transport Association (ATA) of America Code 29, Hydraulic
Power.
(e) Unsafe Condition
This AD was prompted by an investigation of an in-service
leakage event that indicated the use potential of an uncalibrated
torque wrench when tightening the union fittings at the pressure and
return interfaces of all three rudder hydraulic power control units
(PCUs). The FAA is issuing this AD to address union fittings that
could come loose and leak when improperly torqued. The unsafe
condition, if not addressed, could result in the potential loss of
one or more hydraulic systems.
(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-2024-13.
(h) Exception to Transport Canada AD CF-2024-13
(1) Where Transport Canada AD CF-2024-13 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2024-13 refers to hours air
time, this AD requires using flight hours.
(3) Where the material referenced in Transport Canada AD CF-
2024-13 specifies to ``perform a visual inspection for hydraulics
leaks for all Rudder PCUs coil tube fitting (Upper, Middle and
Lower)'' this AD requires replacing that text with ``perform a
visual inspection for hydraulics leaks for all Rudder PCUs coil tube
fitting (Upper, Middle and Lower), and if any leak is found, the
leak must be repaired before further flight.''
(i) No Reporting Requirement
Although the material referenced in Transport Canada AD CF-2024-
13 specifies to submit certain information to the manufacturer, this
AD does not include that requirement.
(j) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, AIR-
520, Continued Operational Safety 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 Continued Operational Safety Branch, send it to the attention of
the person identified in paragraph (k) of this AD and email to:
<a href="/cdn-cgi/l/email-protection#1c5d51535f5c7a7d7d327b736a"><span class="__cf_email__" data-cfemail="e7a6aaa8a4a7818686c9808891">[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, AIR-520,
Continued Operational Safety Branch, FAA; or Transport Canada; or
Airbus Canada Limited Partnership's Transport Canada Design Approval
Organization (DAO). If approved by the DAO, the approval must
include the DAO-authorized signature.
(k) Additional Information
For more information about this AD, contact Brenda Buitrago
Perez, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite
410, Westbury, NY 11590; telephone 516-228 7300; email <a href="/cdn-cgi/l/email-protection#1f26327e696c3271667e7c70327c706c5f797e7e31787069"><span class="__cf_email__" data-cfemail="e8d1c5899e9bc58691898b87c58b879ba88e8989c68f879e">[email protected]</span></a>.
(l) 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-2024-13, dated April 29, 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#184c5b3659716a6f776a6c7071767d6b6b5c716a7d7b6c716e7d6b355b77766b717f767d6b7c7d76796e717f797a7174716c7d364c5b586c7b367f7b367b79"><span class="__cf_email__" data-cfemail="6e3a2d402f071c19011c1a0607000b1d1d2a071c0b0d1a07180b1d432d01001d0709000b1d0a0b000f1807090f0c0702071a0b403a2d2e1a0d40090d400d0f">[email protected]</span></a>. You may find this Transport
Canada 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#94f2e6bafdfae7e4f1f7e0fdfbfad4faf5e6f5baf3fbe2"><span class="__cf_email__" data-cfemail="167064387f7865667375627f7978567877647738717960">[email protected]</span></a>.
Issued on December 16, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2024-30310 Filed 12-19-24; 8:45 am]
BILLING CODE 4910-13-P
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