Rule2022-14212
Airworthiness Directives; CFM International, S.A. Turbofan 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
July 1, 2022
Effective
July 18, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. LEAP-1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A (LEAP-1A) model turbofan engines. This AD was prompted by a manufacturer investigation that revealed that certain high-pressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks) and a stages 6-10 compressor rotor spool were manufactured from material suspected to contain iron inclusion. This AD requires the replacement of certain HPT stage 1 disks and a stages 6-10 compressor rotor spool. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
<html>
<head>
<title>Federal Register, Volume 87 Issue 126 (Friday, July 1, 2022)</title>
</head>
<body><pre>
[Federal Register Volume 87, Number 126 (Friday, July 1, 2022)]
[Rules and Regulations]
[Pages 39329-39332]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-14212]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0803; Project Identifier AD-2022-00732-E;
Amendment 39-22107; AD 2022-14-02]
RIN 2120-AA64
Airworthiness Directives; CFM International, S.A. Turbofan
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain CFM International, S.A. LEAP-1A23, LEAP-1A24, LEAP-1A24E1,
LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30,
LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A (LEAP-1A) model
turbofan engines. This AD was prompted by a manufacturer investigation
that revealed that certain high-pressure turbine (HPT) rotor stage 1
disks (HPT stage 1 disks) and a stages 6-10 compressor rotor spool were
manufactured from material suspected to contain iron inclusion. This AD
requires the replacement of certain HPT stage 1 disks and a stages 6-10
compressor rotor spool. The FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective July 18, 2022.
The FAA must receive comments on this AD by August 15, 2022.
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="https://www.regulations.gov">https://www.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.
For service information identified in this final rule, contact CFM
[[Page 39330]]
International, S.A., Aviation Operations Center, 1 Neumann Way, M/D
Room 285, Cincinnati, OH 45125; phone: (877) 432-3272; email:
<a href="/cdn-cgi/l/email-protection#f99f959c9c8d8a8c8989968b8db99e9cd79a9694"><span class="__cf_email__" data-cfemail="4c2a202929383f393c3c233e380c2b29622f2321">[email protected]</span></a>. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 1200
District Avenue, Burlington, MA 01803. For information on the
availability of this material at the FAA, call (817) 222-5110.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2022-0803; 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 the
Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803;
phone: (781) 238-7743; email: <a href="/cdn-cgi/l/email-protection#400d252824296e0c212d2e3929002621216e272f36"><span class="__cf_email__" data-cfemail="dd90b8b5b9b4f391bcb0b3a4b49dbbbcbcf3bab2ab">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA was notified by the manufacturer of the detection of iron
inclusion in three non-LEAP-1A HPT rotor disks. Further investigation
by the manufacturer determined that the iron inclusion is attributed to
deficiencies in the manufacturing process. The investigation by the
manufacturer also determined that certain CFM International, S.A. LEAP-
1A HPT stage 1 disks and a stages 6-10 compressor rotor spool
manufactured using the same process may have reduced material
properties and a lower fatigue life capability due to iron inclusion,
which may cause premature fracture and uncontained failure. This
condition, if not addressed, could result in uncontained debris
release, damage to the engine, and damage to the aircraft. 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 has determined the
unsafe condition described previously is likely to exist or develop in
other products of the same type design.
Related Service Information
The FAA reviewed CFM International, S.A. Service Bulletin LEAP-1A-
72-00-0474-01A-930A-D, Issue 001-00, dated June 10, 2022. The service
information describes procedures for removing and replacing the HPT
stage 1 disk and stages 6-10 compressor rotor spool.
AD Requirements
This AD requires the replacement of certain HPT stage 1 disks and a
stages 6-10 compressor rotor spool.
Interim Action
The FAA considers this AD to be an interim action. This 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)(3)(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 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.
An unsafe condition exists that requires the immediate adoption of
this AD without providing an opportunity for public comments prior to
adoption. The FAA has found that the risk to the flying public
justifies foregoing notice and comment prior to adoption of this rule
because the presence of iron inclusion in the HPT stage 1 disks and
stages 6-10 compressor rotor spool could lead to premature fracture and
uncontained failure, which indicates an immediate safety of flight
problem. The manufacturer identified 12 parts manufactured from
material suspected to have iron inclusion and calculated reduced life
limits for these parts. These parts are predicted to exceed the reduced
life limits prior to October 2022 and will thus require replacement
within the next 90 days. The longer these parts remain in service, past
their calculated life, the higher the probability of failure.
Therefore, the compliance time for the required actions is shorter than
the time necessary to allow public comment and the FAA to publish a
final rule. Accordingly, notice and opportunity for prior public
comment are impracticable and contrary to the public interest pursuant
to 5 U.S.C. 553(b)(3)(B).
In addition, 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,
for the same reasons the FAA found good cause to forego notice and
comment.
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
ADDRESSES. Include ``FAA-2022-0803 and Project Identifier AD-2022-
00732-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="https://www.regulations.gov">https://www.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, ECO Branch, FAA, and 1200 District
Avenue, Burlington, MA 01803. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.
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.
[[Page 39331]]
Costs of Compliance
The FAA estimates that this AD affects 1 engine installed on
airplanes of U.S. registry. The FAA estimates that zero engines
installed on airplanes of U.S. registry require replacement of the
stages 6-10 compressor rotor spool.
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 HPT stage 1 disk.............. 8 work-hours x $85 per $353,500 $354,180 $354,180
hour = $680.
Replace stages 6[dash]10 compressor 8 work-hours x $85 per 376,600 377,280 0
rotor spool. hour = $680.
----------------------------------------------------------------------------------------------------------------
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:
2022-14-02 CFM International, S.A.: Amendment 39-22107; Docket No.
FAA-2022-0803; Project Identifier AD-2022-00732-E.
(a) Effective Date
This airworthiness directive (AD) is effective July 18, 2022
(b) Affected ADs
None.
(c) Applicability
This AD applies to CFM International, S.A. LEAP-1A23, LEAP-1A24,
LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-
1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A
model turbofan engines with an installed:
(1) High-pressure turbine (HPT) rotor stage 1 disk (HPT stage 1
disk) with part number (P/N) and serial number (S/N) identified in
Table 1 to paragraph (g)(1) of this AD; or,
(2) Stages 6-10 compressor rotor spool with P/N 2468M20G03 and
S/N GWN1141P.
(d) Subject
Joint Aircraft System Component (JASC) Code 7230, Turbine Engine
Compressor Section; 7250, Turbine Section.
(e) Unsafe Condition
This AD was prompted by a manufacturer investigation that
revealed that certain HPT stage 1 disks and a stages 6-10 compressor
rotor spool were manufactured from material suspected to contain
iron inclusion. The FAA is issuing this AD to prevent fracture and
potential uncontained failure of certain HPT stage 1 disks and a
stages 6-10 compressor rotor spool. The unsafe condition, if not
addressed, could result in uncontained debris release, damage to the
engine, and damage to the aircraft.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) At the next engine shop visit or before exceeding the cycles
since new (CSN) threshold in Table 1 to paragraph (g)(1), whichever
occurs first after the effective date of this AD, or if the CSN
threshold in Table 1 to paragraph (g)(1) has been exceeded as of
this AD's effective date, within 50 flight cycles (FCs) from the
effective date of this AD, remove the HPT stage 1 disk with P/N and
S/N identified in Table 1 to paragraph (g)(1) of this AD from
service and replace with an HPT stage 1 disk eligible for
installation.
[[Page 39332]]
[GRAPHIC] [TIFF OMITTED] TR01JY22.014
(2) At the next engine shop visit or before exceeding 7,290 CSN,
whichever occurs first after the effective date of this AD, or if
7,290 CSN has been exceeded as of this AD's effective date, within
50 FCs from the effective date of this AD, remove the stages 6-10
compressor rotor spool with P/N 2468M20G03 and S/N GWN1141P from
service and replace with a stages 6-10 compressor rotor spool
eligible for installation.
(h) Definitions
(1) For the purpose of this AD, an ``HPT stage 1 disk eligible
for installation'' is any HPT stage 1 disk that does not have a P/N
and S/N identified in Table 1 to paragraph (g)(1) of this AD.
(2) For the purpose of this AD, a ``stages 6-10 compressor rotor
spool eligible for installation'' is any stages 6-10 compressor
rotor spool that does not have P/N 2468M20G03 and S/N GWN1141P.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, ECO 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 the
certification office, 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#8acbc4cfa7cbcea7cbc7c5c9caecebeba4ede5fc"><span class="__cf_email__" data-cfemail="3d7c7378107c79107c70727e7d5b5c5c135a524b">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(j) Related Information
For more information about this AD, contact Mehdi Lamnyi,
Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue,
Burlington, MA 01803; phone: (781) 238-7743; email:
<a href="/cdn-cgi/l/email-protection#327f575a565b1c7e535f5c4b5b725453531c555d44"><span class="__cf_email__" data-cfemail="8bc6eee3efe2a5c7eae6e5f2e2cbedeaeaa5ece4fd">[email protected]</span></a>.
(k) Material Incorporated by Reference
None.
Issued on June 23, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-14212 Filed 6-29-22; 11:15 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 July 1, 2022.
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.