Rule2024-06477
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
March 27, 2024
Effective
May 1, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This AD was prompted by damage found on two power- feeder harnesses on three airplanes due to chafing with wheel bins. An investigation found that the power-feeder harnesses were not adequately supported to protect from chafing due to vibration. This AD requires modifying the variable frequency generator (VFG) power-feeder harness routing, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 89 Issue 60 (Wednesday, March 27, 2024)</title>
</head>
<body><pre>
[Federal Register Volume 89, Number 60 (Wednesday, March 27, 2024)]
[Rules and Regulations]
[Pages 21179-21181]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-06477]
========================================================================
Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
========================================================================
Federal Register / Vol. 89, No. 60 / Wednesday, March 27, 2024 /
Rules and Regulations
[[Page 21179]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-1880; Project Identifier MCAI-2023-00587-T;
Amendment 39-22690; AD 2024-04-11]
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: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-
1A11 airplanes. This AD was prompted by damage found on two power-
feeder harnesses on three airplanes due to chafing with wheel bins. An
investigation found that the power-feeder harnesses were not adequately
supported to protect from chafing due to vibration. This AD requires
modifying the variable frequency generator (VFG) power-feeder harness
routing, as specified in a Transport Canada AD, which is incorporated
by reference. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective May 1, 2024.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 1, 2024.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-1880; 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 incorporated by reference 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#bbeff895fad2c9ccd4c9cfd3d2d5dec8c8ffd2c9ded8cfd2cddec896f8d4d5c8d2dcd5dec8dfded5dacdd2dcdad9d2d7d2cfde95eff8fbcfd895dcd895d8da"><span class="__cf_email__" data-cfemail="94c0d7bad5fde6e3fbe6e0fcfdfaf1e7e7d0fde6f1f7e0fde2f1e7b9d7fbfae7fdf3faf1e7f0f1faf5e2fdf3f5f6fdf8fde0f1bac0d7d4e0f7baf3f7baf7f5">[email protected]</span></a>; website tc.canada.ca/en/aviation.
<bullet> For service information incorporated by reference in this
AD, contact Airbus Canada Limited Partnership, 13100 Henri-Fabre
Boulevard, Mirabel, Qu[eacute]bec, J7N 3C6, Canada; telephone 450-476-
7676; email <a href="/cdn-cgi/l/email-protection#89e8bbbbb9d6eafbeac9e8ebeaa7e8e0fbebfcfa"><span class="__cf_email__" data-cfemail="24451616147b475647644546470a454d56465157">[email protected]</span></a>; website <a href="http://a220world.airbus.com">a220world.airbus.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. It is also available in the AD docket at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-1880.
FOR FURTHER INFORMATION CONTACT: William Reisenauer, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#1e27337f686d3370677f7d71337d716d5e787f7f30797168"><span class="__cf_email__" data-cfemail="764f5b1700055b180f1715195b1519053610171758111900">[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 certain Airbus Canada
Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. The
NPRM published in the Federal Register on September 14, 2023 (88 FR
63034). The NPRM was prompted by AD CF-2023-24, dated April 6, 2023,
issued by Transport Canada, which is the aviation authority for Canada
(Transport Canada AD CF-2023-24) (also referred to as the MCAI). The
MCAI states that two VFG power-feeder harnesses were found damaged due
to chafing with wheel bins during maintenance in service on three
airplanes. An investigation found that the power-feeder harnesses were
not adequately supported to protect from chafing due to vibration.
In the NPRM, the FAA proposed to require modifying the VFG power-
feeder harness routing, as specified in Transport Canada AD CF-2023-24.
The FAA is issuing this AD to prevent damage to VFG power-feeder
harnesses from chafing due to vibration. The unsafe condition, if not
addressed, could lead to a loss of generated power from both VFGs, or
to a fire in the case of flammable fluid contact with arcing wires.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-1880.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from Delta Air Lines (DAL). The following
presents the comments received on the NPRM and the FAA's response to
each comment.
Request To Provide Grace Period
DAL requested the FAA to provide a 30- to 60-day grace period to
allow adequate planning for completion of the modification at a
maintenance station. DAL stated that some of its fleet of affected
airplanes are already beyond the time allotted by Transport Canada AD
CF-2023-24. After initiating the incorporation of the service bulletin,
DAL discovered numerous issues and worked with Airbus to resolve those
issues. (Some of those issues are discussed below.) As a result, DAL
reports that it has been unable to complete the modification on its
fleet, and, as those airplanes continue to accumulate flight cycles,
many DAL airplanes would be grounded when the AD becomes effective if
no grace period is allowed.
The FAR
A does not agree with the requested change. The manufacturer has
established the compliance time through risk assessment analysis.
Unilateral addition of compliance time increases the risk. However, the
FAA will consider requests to approve an extension of the compliance
time as an AMOC (alternative method of compliance) to address airplanes
that have already reached the limit, if sufficient data are submitted
to
[[Page 21180]]
substantiate that the change would provide an acceptable level of
safety. No change has been made to this AD in response to this request.
Request To Correct Part Identifying Information
DAL discovered the following discrepancies in the service
information referenced in Transport Canada AD CF-2023-24 (Airbus Canada
Limited Partnership Service Bulletin BD500-534101, Issue 007, dated
October 2, 2020).
<bullet> Steps 3.7.4.1 and 3.7.4.2 specify installing and torquing
screws with the incorrect item number (14). Figure 6 correctly shows
this screw as item (18).
<bullet> Step 3.7.7 specifies installing harnesses with the correct
part numbers CPYTG2039 and CPYTH2041. Step 3.7.7.1 incorrectly
specifies installing harnesses with part numbers CPWTG2032 and
CPWTH2034.
The FAA acknowledges these errors and has added paragraphs (h)(3)
and (4) of this AD to specify the correct information.
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, considered the
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 this product. Except for minor editorial
changes, and any other changes described previously, this AD is adopted
as proposed in the NPRM. None of the changes will increase the economic
burden on any operator.
Related Service Information Under 1 CFR Part 51
Transport Canada AD CF-2023-24 specifies procedures for modifying
the VFG power-feeder harness routing, including a general visual
inspection for damage at the intersection of the VFG power-feeder
harnesses and the surface of the wheel bins, and corrective actions
including obtaining and following repair instructions. 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 16 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 51 work-hours x $85 per hour Up to $3,538......... Up to $7,873......... Up to $125,968.
= Up to $4,335.
----------------------------------------------------------------------------------------------------------------
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:
2024-04-11 Airbus Canada Limited Partnership (Type Certificate
Previously Held by C Series Aircraft Limited Partnership (CSALP);
Bombardier, Inc.): Amendment 39-22690; Docket No. FAA-2023-1880;
Project Identifier MCAI-2023-00587-T.
(a) Effective Date
This airworthiness directive (AD) is effective May 1, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Airbus Canada Limited Partnership Model BD-
500-1A10 and BD-500-1A11 airplanes, certificated in any category, as
identified in Transport Canada AD CF-2023-24, dated April 6, 2023
(Transport Canada AD CF-2023-24).
(d) Subject
Air Transport Association (ATA) of America Code 24, Electrical
Power.
(e) Unsafe Condition
This AD was prompted by damage found on two variable frequency
generator (VFG) power-feeder harnesses on three airplanes due to
chafing with wheel bins. An investigation found that the power-
feeder harnesses were not adequately supported to protect from
chafing due to vibration. The FAA is issuing this AD to prevent
damage to VFG power-feeder harnesses from chafing due to vibration.
The unsafe condition, if not addressed, could lead to a loss of
generated power from both VFGs, or to a fire in the case of
flammable fluid contact with arcing wires.
[[Page 21181]]
(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-2023-24.
(h) Exceptions to Transport Canada AD CF-2023-24
(1) Where Transport Canada AD CF-2023-24 refers to its effective
date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2023-24 refers to ``hours air
time,'' this AD requires replacing those words with ``flight
hours.''
(3) Where the service information specified in Transport Canada
AD CF-2023-24, in steps 3.7.4.1 and 3.7.4.2, specifies using
``screws (14),'' this AD requires replacing those words with
``screws (18).''
(4) Where the service information specified in Transport Canada
AD CF-2023-24, in step 3.7.7.1, specifies installing ``harnesses
CPWTG2032 and CPWTH2034,'' this AD requires replacing those words
with ``harnesses CPYTG2039 and CPYTH2041.''
(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 International
Validation Branch, send it to the attention of the person identified
in paragraph (j) of this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#70495d3126235d3139225d4743405d313d3f33301611115e171f06"><span class="__cf_email__" data-cfemail="ad9480ecfbfe80ece4ff809a9e9d80ece0e2eeedcbcccc83cac2db">[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 Airbus Canada
Limited Partnership'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 William Reisenauer,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; phone: 516-228-7300; email: <a href="/cdn-cgi/l/email-protection#ecd5c18d9a9fc182958d8f83c18f839fac8a8d8dc28b839a"><span class="__cf_email__" data-cfemail="f4cdd9958287d99a8d95979bd9979b87b4929595da939b82">[email protected]</span></a>.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless this AD specifies otherwise.
(i) Transport Canada AD CF-2023-24, dated April 6, 2023.
(ii) [Reserved]
(3) For Transport Canada AD CF-2023-24, contact 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#5307107d123a21243c21273b3a3d362020173a213630273a2536207e103c3d203a343d362037363d32253a3432313a3f3a27367d07101327307d34307d3032"><span class="__cf_email__" data-cfemail="7226315c331b00051d00061a1b1c170101361b001711061b0417015f311d1c011b151c170116171c13041b1513101b1e1b06175c26313206115c15115c1113">[email protected]</span></a>. You
may find this Transport Canada AD 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="/cdn-cgi/l/email-protection#dee2bffeb6acbbb8e3" http: www.archives.gov federal-register cfr ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="264f44540b4a494547524f4948554954434b474f4a4054084f4855564345524f4948664847544708414950">[email protected]</span></a>"><a href="http://www.archives.gov/federal-register/cfr/ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="7a131808571615191b0e1315140915081f171b13161c08541314090a1f190e1315143a141b081b541d150c">[email protected]</span></a></a>.
Issued on February 27, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-06477 Filed 3-26-24; 8:45 am]
BILLING CODE 4910-13-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on March 27, 2024.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.