Rule2024-21408
Airworthiness Directives; CFM International, S.A. Engines
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
September 20, 2024
Effective
October 7, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1A32 engines. This AD was prompted by a report of multiple events of loss of thrust control during go-around. This AD requires replacement of the full set of fuel nozzles. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 183 (Friday, September 20, 2024)</title>
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[Federal Register Volume 89, Number 183 (Friday, September 20, 2024)]
[Rules and Regulations]
[Pages 77013-77015]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-21408]
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Rules and Regulations
Federal Register
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Federal Register / Vol. 89, No. 183 / Friday, September 20, 2024 /
Rules and Regulations
[[Page 77013]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2146; Project Identifier AD-2024-00464-E;
Amendment 39-22849; AD 2024-19-07]
RIN 2120-AA64
Airworthiness Directives; CFM International, S.A. Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain CFM International, S.A. (CFM) Model LEAP-1A32 engines. This AD
was prompted by a report of multiple events of loss of thrust control
during go-around. This AD requires replacement of the full set of fuel
nozzles. The FAA is issuing this AD to address the unsafe condition on
these products.
DATES: This AD is effective October 7, 2024.
The FAA must receive comments on this AD by November 4, 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-2024-2146; 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, any comments received, and other
information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone:
(781) 238-7743; email: <a href="/cdn-cgi/l/email-protection#5a373f323e3374363b373423331a3c3b3b743d352c"><span class="__cf_email__" data-cfemail="dbb6beb3bfb2f5b7bab6b5a2b29bbdbabaf5bcb4ad">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this final rule. Send your comments to an address listed under
the ADDRESSES section. Include ``Docket No. FAA-2024-2146; Project
Identifier AD-2024-00464-E'' at the beginning of your comments. The
most helpful comments reference a specific portion of the final rule,
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 final rule 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 final rule.
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 AD 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 AD, 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 AD. Submissions containing CBI should be sent to Mehdi
Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des
Moines, WA 98198. Any commentary that the FAA receives which is not
specifically designated as CBI will be placed in the public docket for
this rulemaking.
Background
On January 11, 2024, an Airbus Model A321neo airplane powered by
CFM Model LEAP-1A engines experienced a loss of thrust control on
engine 1 during a go-around. On February 4, 2024, the same Airbus Model
A321neo airplane experienced N1 fluctuation/reduction on engine 2
during a go-around. A manufacturer investigation determined that
significantly higher than expected fuel nozzle coking was creating back
pressure in the fuel system that then triggered the fuel pump relief
valve to open, reducing fuel flow to the engine and resulting in a
reduction in thrust. This condition, if not addressed, could result in
loss of engine thrust control and reduced control of the airplane. The
FAA is issuing this AD to address the unsafe condition on these
products.
FAA's Determination
The FAA is issuing this AD because the agency determined the unsafe
condition described previously is likely to exist or develop in other
products of the same type design.
AD Requirements
This AD requires replacement of the full set of fuel nozzles.
Interim Action
The FAA considers this AD to be an interim action. The unsafe
condition is still under investigation by the manufacturer and,
depending on the results of that investigation, the FAA may consider
further rulemaking action.
Justification for Immediate Adoption and Determination of the Effective
Date
Section 553(b) of the Administrative Procedure Act (APA) (5 U.S.C.
551 et seq.) authorizes agencies to dispense with notice and comment
procedures for rules when the agency, for ``good cause,'' finds that
those procedures are ``impracticable, unnecessary, or contrary to the
public interest.'' Under this section, an agency, upon finding good
cause, may issue a final rule without providing notice and seeking
comment
[[Page 77014]]
prior to issuance. Further, section 553(d) of the APA authorizes
agencies to make rules effective in less than thirty days, upon a
finding of good cause.
The FAA justifies waiving notice and comment prior to adoption of
this rule because no domestic operators use this product. It is
unlikely that the FAA will receive any adverse comments or useful
information about this AD from any U.S. operator. Accordingly, notice
and opportunity for prior public comment are unnecessary, pursuant to 5
U.S.C. 553(b). In addition, for the foregoing reason(s), the FAA finds
that good cause exists pursuant to 5 U.S.C. 553(d) for making this
amendment effective in less than 30 days.
Regulatory Flexibility Act
The requirements of the Regulatory Flexibility Act (RFA) do not
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt
a rule without prior notice and comment. Because FAA has determined
that it has good cause to adopt this rule without prior notice and
comment, RFA analysis is not required.
Costs of Compliance
The FAA estimates that this AD affects 0 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Replace the full set of fuel nozzles 40 work-hours x $85 per $126,000 $129,400 $0
hour = $3,400.
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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, and
(2) Will not affect intrastate aviation in Alaska.
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:
2024-19-07 CFM International, S.A.: Amendment 39-22849; Docket No.
FAA-2024-2146; Project Identifier AD-2024-00464-E.
(a) Effective Date
This airworthiness directive (AD) is effective October 7, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to CFM International, S.A. (CFM) Model LEAP-1A32
engines installed on Airbus SAS Model A321-251NX airplanes having
any of the following airplane serial numbers: 11200, 11420, 11473,
11609, 11698, 11791, 11815, 12136, 12314, and 12370.
(d) Subject
Joint Aircraft System Component (JASC) Code 7300, Engine Fuel
and Control.
(e) Unsafe Condition
This AD was prompted by a report of multiple events of loss of
thrust control during go-around. The FAA is issuing this AD to
prevent the loss of engine thrust control. The unsafe condition, if
not addressed, could result in reduced control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) At the applicable times specified in paragraphs (g)(1)(i)
and (ii) of this AD, replace the full set of fuel nozzles, on each
engine, with parts eligible for installation.
(i) On either affected engine installed on the airplane: Before
accumulating 600 flight cycles (FCs) since new or since last
replacement of the full set of fuel nozzles, or within 10 FCs after
the effective date of this AD, whichever occurs later.
(ii) On the other affected engine installed on the same
airplane: Before accumulating 800 FCs since new or since last
replacement of the full set of fuel nozzles, or within 10 FCs after
the effective date of this AD, whichever occurs later.
(2) Thereafter, on each affected engine installed on the
airplane, at intervals not to exceed 600 FCs since last replacement
of the full set of fuel nozzles, replace the full set of fuel
nozzles with parts eligible for installation.
(h) Definition
For the purpose of this AD, ``parts eligible for installation''
are new fuel nozzles or fuel nozzles made serviceable using CFM
Component Maintenance Manual (CMM) 73-11-30 (CFM-TP.CM.056.), any
revision.
(i) Alternative Methods of Compliance (AMOCs)
(1) 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 local
Flight Standards District Office, as appropriate. If sending
information directly to the manager of AIR-520 Continued Operational
Safety Branch, send it to the attention of the person identified in
paragraph (j)(1) of this AD and email to: <a href="/cdn-cgi/l/email-protection#6e2f23212d2e080f0f40090118"><span class="__cf_email__" data-cfemail="3574787a76755354541b525a43">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
[[Page 77015]]
of the local flight standards district office/certificate holding
district office.
(j) Additional Information
(1) For more information about this AD, contact Mehdi Lamnyi,
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines,
WA 98198; phone: (781) 238-7743; email: <a href="/cdn-cgi/l/email-protection#432e262b272a6d2f222e2d3a2a032522226d242c35"><span class="__cf_email__" data-cfemail="f39e969b979add9f929e9d8a9ab3959292dd949c85">[email protected]</span></a>.
(2) Material identified in this AD that is not incorporated by
reference is available at CFM International, S.A., GE Aviation Fleet
Support, 1 Neumann Way, M/D Room 285, Cincinnati, OH 45215; phone:
(877) 432-3272; email: <a href="/cdn-cgi/l/email-protection#2c4d5a454d58454342024a404949585f595c5c435e586c4b49024f4341"><span class="__cf_email__" data-cfemail="016077686075686e6f2f676d646475727471716e73754166642f626e6c">[email protected]</span></a>.
(k) Material Incorporated by Reference
None.
Issued on September 13, 2024.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2024-21408 Filed 9-19-24; 8:45 am]
BILLING CODE 4910-13-P
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