Proposed Rule2024-10965
Airworthiness Directives; Bombardier, Inc., Airplanes
Primary source
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Published
May 22, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-2A12 airplanes. This proposed AD was prompted by reports that the pivot door pressure seals on the thrust reverser fixed structure were found disbonded or missing on several airplanes. This proposed AD would require inspecting the pivot door pressure seals and accomplishing applicable corrective actions. This proposed AD would also require a functional test of the thrust reversers. 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 100 (Wednesday, May 22, 2024)</title>
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[Federal Register Volume 89, Number 100 (Wednesday, May 22, 2024)]
[Proposed Rules]
[Pages 44933-44935]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-10965]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-1468; Project Identifier MCAI-2023-00975-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-700-2A12 airplanes. This
proposed AD was prompted by reports that the pivot door pressure seals
on the thrust reverser fixed structure were found disbonded or missing
on several airplanes. This proposed AD would require inspecting the
pivot door pressure seals and accomplishing applicable corrective
actions. This proposed AD would also require a functional test of the
thrust reversers. 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 July 8,
2024.
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-2024-1468; 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, Inc. service information, 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#563735782f233a1637332439786a37763e2433306b" 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 service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200 South
216th Street, 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 516-228-7366; email <a href="/cdn-cgi/l/email-protection#b3d9dcc0d6c3db9dd0d2c7d2ddc9d2c1dcf3d5d2d29dd4dcc5"><span class="__cf_email__" data-cfemail="22484d5147524a0c414356434c5843504d624443430c454d54">[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 ADDRESSES. Include ``Docket No. FAA-2024-1468; Project Identifier
MCAI-2023-00975-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
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 516-228-7366; email
<a href="/cdn-cgi/l/email-protection#c9a3a6baacb9a1e7aaa8bda8a7b3a8bba689afa8a8e7aea6bf"><span class="__cf_email__" data-cfemail="e68c899583968ec885879287889c879489a6808787c8818990">[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-2023-61, dated August 16, 2023 (Transport
Canada AD CF-2023-61) (also referred
[[Page 44934]]
to after this as the MCAI), to correct an unsafe condition on certain
serial-numbered Bombardier, Inc., Model BD-700-2A12 airplanes. The MCAI
states that the pivot door pressure seals on the thrust reverser fixed
structure were found disbonded or missing on several airplanes. The
investigation revealed that the seal disbond condition was caused by
the variation in the installation process of the seals during bonding
surface preparation and sealant application. The unsafe condition, if
not addressed, could result in engine thrust loss due to flow path
overboard leakage during forward thrust operation and reduce airplane
performance during one-engine inoperative conditions in climb margin
and ceiling altitude.
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-2024-1468.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Bombardier Service Bulletin 700-78-7501, Revision
01, dated July 13, 2023. This service information specifies procedures
for a one-time general visual inspection for discrepant (missing,
damaged, or disbonded) thrust reverser pivoting door pressure seals, a
bonding check of the pivoting door seals, and repair or replacement of
discrepant seals. This service information also specifies procedure for
performing a functional test of the thrust reverser.
This service information 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
service information 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 service information already described.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 53 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 per Cost on U.S.
Labor cost Parts cost product operators
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6 work-hours x $85 per hour = $0 $510 $27,030
$510........................
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The FAA estimates the following costs to do any necessary on-
condition action 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 this on-condition action:
Estimated Costs of On-Condition Actions
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Labor cost Parts cost Cost per product
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Up to 24 work-hours x $85 per hour = $2,040....... $4,850 Up to $6,890.
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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 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:
[[Page 44935]]
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-2024-1468; Project Identifier MCAI-
2023-00975-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by July 8, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-700-2A12
airplanes, certificated in any category, serial numbers 70007,
70008, 70010, 70012 through 70047 inclusive, 70049, 70051, 70052,
70053, 70055 through 70077 inclusive, 70079, 70080, 70081, 70083
through 70133 inclusive, 70135, 70136, 70137, 70138, 70142 through
70148 inclusive, 70150, 70152, and 70158.
(d) Subject
Air Transport Association (ATA) of America Code 78, Engine
exhaust.
(e) Unsafe Condition
This AD was prompted by reports that the pivot door pressure
seals on the thrust reverser fixed structure were found disbonded or
missing on several airplanes. The FAA is issuing this AD to address
the pivot door pressure seals on the thrust reverser fixed
structure. The unsafe condition, if not addressed, could result in
engine thrust loss due to flow path overboard leakage during forward
thrust operation and reduce airplane performance during one-engine
inoperative conditions in climb margin and ceiling altitude.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection and Functional Test
(1) Within 750 flight hours or 18 months, whichever comes first
from the effective date of this AD, perform a general visual
inspection for discrepancies (missing, damaged, or disbonding) of
the 4 pivot door pressure seals on the thrust reverser door of each
engine, and perform a bonding check as applicable, and repair or
replace each discrepant seal as applicable, in accordance with Part
2.B of the Accomplishment Instructions of Bombardier Service
Bulletin 700-78-7501, Revision 01, dated July 13, 2023. Applicable
corrective actions must be done before further flight.
(2) Before further flight after accomplishing the actions
specified in paragraph (g)(1) of this AD: Perform a functional test
of the thrust reverser in accordance with Part 2.C of the
Accomplishment Instructions of Bombardier Service Bulletin 700-78-
7501, Revision 01, dated July 13, 2023.
(h) Credit for Previous Actions
This paragraph provides credit for actions required by paragraph
(g) of this AD, if those actions were performed before the effective
date of this AD using Bombardier Service Bulletin 700-78-7501, dated
April 12, 2023.
(i) No Reporting Requirement
Although the service information referenced in Bombardier
Service Bulletin 700-78-7501, Revision 01, dated July 13, 2023,
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,
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, mail it to the address identified
in paragraph (k) of this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#c2fbef839491ef8c9b83818def818d9182a4a3a3eca5adb4"><span class="__cf_email__" data-cfemail="a99084e8fffa84e7f0e8eae684eae6fae9cfc8c887cec6df">[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.
(k) Additional Information
For more information about this AD, contact Joseph Catanzaro,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7366; email
<a href="/cdn-cgi/l/email-protection#e18b8e92849189cf828095808f9b80938ea1878080cf868e97"><span class="__cf_email__" data-cfemail="0d67627e687d65236e6c796c63776c7f624d6b6c6c236a627b">[email protected]</span></a>.
(l) 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) Bombardier Service Bulletin 700-78-7501, Revision 01, dated
July 13, 2023.
(ii) [Reserved]
(3) For Bombardier, Inc. service information, 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#dabbb9f4a3afb69abbbfa8b5f4e6bbfab2a8bfbce7" 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
Street, 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#81e7f3afe8eff2f1e4e2f5e8eeefc1efe0f3e0afe6eef7"><span class="__cf_email__" data-cfemail="d6b0a4f8bfb8a5a6b3b5a2bfb9b896b8b7a4b7f8b1b9a0">[email protected]</span></a>.
Issued on May 14, 2024.
James D. Foltz,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-10965 Filed 5-21-24; 8:45 am]
BILLING CODE 4910-13-P
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