Document ID: FAA-2023-2149-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Waltera.s., and MOTORLET a.s.) Engines
Posted Date: 2023-11-14T05:00Z

[Federal Register Volume 88, Number 218 (Tuesday, November 14, 2023)]
[Proposed Rules]
[Pages 77918-77921]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-24639]

[[Page 77918]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-2149; Project Identifier MCAI-2023-00136-E]
RIN 2120-AA64

Airworthiness Directives; GE Aviation Czech s.r.o. (Type 
Certificate Previously Held by WALTER Engines a.s., Walter a.s., and 
MOTORLET a.s.) Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2022-13-16, which applies to all GE Aviation Czech s.r.o. (GEAC) (type 
certificate previously held by WALTER Engines a.s., Walter a.s., and 
MOTORLET a.s.) Model M601D-11 engines; and AD 2022-14-12, which applies 
to certain GEAC Model M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E-
11S, and M601F engines. AD 2022-13-16 requires revising the 
airworthiness limitations section (ALS) of the existing engine 
maintenance manual (EMM) to incorporate a visual inspection of the 
centrifugal compressor case for cracks. AD 2022-14-12 requires 
replacing the propeller shaft for Model M601F engines. AD 2022-14-12 
also requires calculating the accumulated life of the propeller shaft 
and replacing the propeller shaft, if necessary, for model M601D-11, 
M601E-11, M601E-11A, M601E-11AS, and M601E-11S engines. Since the FAA 
issued AD 2022-13-16 and AD 2022-14-12, the manufacturer revised the 
ALS of the existing EMM to introduce new and more restrictive tasks and 
limitations, expand the applicability to all Model M601 engines, and 
incorporate certain requirements addressed by AD 2021-13-07 and AD 
2023-01-10, which prompted this proposed AD. This proposed AD would 
require revising the ALS of the existing EMM and the operator's 
existing approved engine maintenance or inspection program, as 
applicable, to incorporate new and more restrictive tasks and 
limitations, as specified in a European Union Aviation Safety Agency 
(EASA) 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 NPRM by December 29, 2023.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: (202) 493-2251.
     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.
     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 regulations.gov under 
Docket No. FAA-2023-2149; 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:
     For service information identified in this NPRM, contact 
EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 
8999 000; email: [email protected]; website: easa.europa.eu. You may 
find this material on the EASA website at ad.easa.europa.eu. It is also 
available at regulations.gov under Docket No. FAA-2023-2149.
     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.

FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety 
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
phone: (781) 238-7146; email: [email protected].

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-2023-2149; Project Identifier 
MCAI-2023-00136-E'' 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 
regulations.gov, 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 
Barbara Caufield, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, 
Suite 410, Westbury, NY 11590. Any commentary that the FAA receives 
which is not specifically designated as CBI will be placed in the 
public docket for this rulemaking.

Background

    The FAA issued AD 2021-13-07, Amendment 39-21612 (86 FR 31601, June 
15, 2021) (AD 2021-13-07) for all GEAC Model M601D-11, M601E-11, M601E-
11A, M601E-11AS, M601E-11S, and M601F engines. AD 2021-13-07 was 
prompted by an MCAI originated by EASA. EASA issued EASA Emergency AD 
2021-0125-E, dated May 7, 2021 (EASA Emergency AD 2021-0125-E) to 
correct an unsafe condition identified as the manufacturer finding 
errors in the ALS of the existing EMM, including errors in the formula 
to determine the consumed equivalent flight cycles of critical parts 
and errors with certain part numbers. The manufacturer also determined 
that the life limit of a certain compressor case installed on Model 
M601E engines was not listed in the ALS of the applicable EMM.
    AD 2021-13-07 requires recalculating the life of critical parts and 
replacing critical parts, if necessary. AD 2021-13-

[[Page 77919]]

07 also requires replacing a certain compressor case. The FAA issued AD 
2021-13-07 to prevent failure of the engine.
    The FAA issued AD 2022-13-16, Amendment 39-22102 (87 FR 37986, June 
27, 2022) (AD 2022-13-16), for all GEAC Model M601D-11 engines. AD 
2022-13-16 was prompted by an MCAI originated by EASA, which is the 
Technical Agent for the Member States of the European Union. EASA 
issued AD 2021-0060, dated March 3, 2021 (EASA AD 2021-0060) to correct 
an unsafe condition identified as the manufacturer revising the ALS to 
introduce a visual inspection of the centrifugal compressor case for 
cracks.
    AD 2022-13-16 requires revising the ALS of the existing EMM to 
incorporate a visual inspection of the centrifugal compressor case for 
cracks. The FAA issued AD 2022-13-16 to prevent failure of the 
centrifugal compressor case.
    The FAA issued AD 2022-14-12, Amendment 39-22117 (87 FR 42066, July 
14, 2022) (AD 2022-14-12), for certain GEAC Model M601D-11, M601E-11, 
M601E-11A, M601E-11AS, M601E-11S, and M601F engines. AD 2022-14-12 was 
prompted by an MCAI originated by EASA. EASA issued AD 2021-0154, dated 
July 1, 2021 (EASA AD 2021-0154) to correct an unsafe condition 
identified as the absence of life limits for the propeller shaft part 
number M601-6081.6 in the ALS of the applicable EMM, as well as a lack 
of data necessary for operators to determine the accumulated life of 
certain propeller shafts, resulting in a propeller shaft life limit 
that may not have been implemented correctly.
    AD 2022-14-12 requires replacing the propeller shaft for Model 
M601F engines. AD 2022-14-12 also requires calculating the accumulated 
life of the propeller shaft and replacing the propeller shaft, if 
necessary, for model M601D-11, M601E-11, M601E-11A, M601E-11AS, and 
M601E-11S engines. The FAA issued AD 2022-14-12 to prevent failure of 
the propeller shaft.
    The FAA issued AD 2023-01-10, Amendment 39-22304 (88 FR 7578, 
February 6, 2023) (AD 2023-01-10) for certain GEAC Model M601E-11, 
M601E-11A, M601E-11AS, M601E-11S, and M601F engines. AD 2023-01-10 was 
prompted by an MCAI originated by EASA. EASA issued EASA AD 2021-0264, 
dated November 22, 2021 (EASA AD 2021-0264) to correct an unsafe 
condition identified as the exclusion of life limits for certain 
compressor cases and compressor drums from the ALS of the EMM and 
certain compressor cases that, following rework, were improperly re-
identified and had incomplete engine logbook entries.
    AD 2023-01-10 requires recalculating the consumed life for certain 
compressor cases and compressor drums and replacing certain compressor 
cases and compressor drums, if necessary. The FAA issued AD 2023-01-10 
to prevent failure of the compressor case and compressor drum.

Actions Since the Previous ADs Were Issued

    Since the FAA issued AD 2021-13-07, AD 2022-13-16, AD 2022-14-12, 
and AD 2023-01-10, EASA superseded EASA AD 2021-0060 and EASA AD 2021-
0154 and issued EASA AD 2023-0020, dated January 23, 2023 (EASA AD 
2023-0020) (also referred to as the MCAI). The MCAI states that the 
manufacturer revised the ALS to incorporate new and more restrictive 
tasks and limitations, expand the applicability to all model M601 
series engines, and include certain requirements that were previously 
addressed by EASA Emergency AD 2021-0125-E and EASA AD 2021-0264. The 
MCAI also states that the manufacturer published service information 
that specifies instructions to determine the accumulated life of 
certain propeller shafts.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-2149.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed EASA AD 2023-0020, which specifies procedures for 
accomplishment of the actions specified in the ALS, including 
performing maintenance tasks, replacing life-limited parts, and 
revising the existing approved maintenance or inspection program, as 
applicable, by incorporating the instructions and associated thresholds 
and intervals described in the ALS, as applicable to engine model and 
depending on engine configuration.
    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 ADDRESSES.

FAA's Determination

    These products have been approved by the aviation authority of 
another country and are 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 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 MCAI described previously, except for any differences identified 
as exceptions in the regulatory text of this proposed AD and as 
discussed under ``Differences Between this Proposed AD and the MCAI.''
    This proposed AD would terminate the requirements of paragraphs 
(g)(1) through (3) of AD 2021-13-07 for model M601D-11, M601E-11, 
M601E-11A, M601E-11AS, M601E-11S, and M601F engines only.
    This proposed AD would terminate the requirements of paragraphs 
(g)(1) through (3) of AD 2023-01-10 for model M601E-11, M601E-11A, 
M601E-11AS, M601E-11S, and M601F engines only.
    The owner/operator (pilot) holding at least a private pilot 
certificate may revise the ALS of the existing EMM and must enter 
compliance with the applicable paragraph of this proposed AD into the 
engine maintenance records in accordance with 14 CFR 43.9(a) and 
91.417(a)(2)(v). The pilot may perform this action because it only 
involves revising the pilot's manual. This action could be performed 
equally well by a pilot or a mechanic. This is an exception to the 
FAA's standard maintenance regulations.

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 since 
coordinated with other manufacturers and CAAs to use this process. As a 
result, the FAA proposes to incorporate by reference EASA AD 2023-0020 
in the FAA final rule. This proposed AD would, therefore, require 
compliance with EASA AD 2023-0020 in its entirety through that 
incorporation, except for any differences identified as exceptions in 
the regulatory text of this proposed AD. Using common terms that are 
the same as the heading of a particular section in the EASA AD does not 
mean that operators need comply only with that section. For example, 
where the AD requirement refers to ``all required actions within the 
compliance times,'' compliance with this AD requirement is not limited 
to the section titled

[[Page 77920]]

``Required Action(s) and Compliance Time(s)'' in EASA AD 2023-0020. 
Service information required by the EASA AD for compliance will be 
available at regulations.gov under Docket No. FAA-2023-2149 after the 
FAA final rule is published.

Differences Between This Proposed AD and the MCAI

    Where the MCAI applies to Model M601D, M601D-1, M601D-2, M601D-
11NZ, M601E, M601E-21, M601FS, and M601Z engines, this proposed AD does 
not, as these engine models are not type certificated in the United 
States.
    Where the MCAI defines the AMP as the approved Aircraft Maintenance 
Programme containing the tasks on the basis of which the scheduled 
maintenance is conducted to ensure the continuing airworthiness of each 
operated engine, this proposed AD defines the AMP as the aircraft 
maintenance program containing the tasks on the basis of which the 
scheduled maintenance is conducted to ensure the continuing 
airworthiness of each operated airplane.
    Where the MCAI specifies the ALS of GEAC EMM No. 0982309, Revision 
21, dated November 18, 2022, this proposed AD specifies the ALS of GEAC 
EMM No. 0982309, Revision 22, dated March 10, 2023. The ALS in Revision 
22 of GEAC EMM No. 0982309 is unchanged from Revision 21.
    Where paragraph (3) of the MCAI specifies revising the approved 
Aircraft Maintenance Programme within 12 months after the effective 
date of EASA AD 2023-0020, this proposed AD would require revising the 
ALS of the existing approved engine maintenance or inspection program, 
as applicable, within 90 days after the effective date of this AD.
    This proposed AD would not require compliance with paragraphs (1), 
(2), (4), and (5) of the MCAI.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 42 engines installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                  Cost on U.S.
              Action                    Labor cost           Parts cost      Cost per product      operators
----------------------------------------------------------------------------------------------------------------
Revise the ALS...................  1 work-hour x $85                    $0                $85             $3,570
                                    per hour = $85.
----------------------------------------------------------------------------------------------------------------

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 that the 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:
0
a. Removing Airworthiness Directive 2022-13-16, Amendment 39-22102 (87 
FR 37986, June 27, 2022); and Airworthiness Directive 2022-14-12, 
Amendment 39-22117 (87 FR 42066, July 14, 2022); and
0
b. Adding the following new airworthiness directive:

GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER 
Engines a.s., Walter a.s., and MOTORLET a.s.): Docket No. FAA-2023-
2149; Project Identifier MCAI-2023-00136-E.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by December 29, 2023.

(b) Affected ADs

    (1) This AD affects AD 2021-13-07, Amendment 39-21612 (86 FR 
31601, June 15, 2021) (AD 2021-13-07).
    (2) This AD replaces AD 2022-13-16, Amendment 39-22102 (87 FR 
37986, June 27, 2022) (AD 2022-13-16).
    (3) This AD replaces AD 2022-14-12, Amendment 39-22117 (87 FR 
42066, July 14, 2022) (AD 2022-14-12).
    (4) This AD affects AD 2023-01-10, Amendment 39-22304 (88 FR 
7578, February 6, 2023) (AD 2023-01-10).

(c) Applicability

    This AD applies to GE Aviation Czech s.r.o. (GEAC) (type 
certificate previously held by WALTER Engines a.s., Walter a.s., and 
MOTORLET a.s.) Model M601D-11, M601E-11, M601E-11A, M601E-11AS, 
M601E-11S, and M601F engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7210, Turbine Engine 
Reduction Gear.

(e) Unsafe Condition

    This AD was prompted by the manufacturer revising the 
airworthiness limitations section (ALS) of the existing engine 
maintenance manual (EMM) to introduce new and more restrictive tasks 
and limitations and associated thresholds and intervals for life-
limited parts. The FAA is issuing this AD to prevent failure of the 
engine. The unsafe condition, if not addressed, could result in 
uncontained release of a critical part, damage to the engine, and 
damage to the airplane.

[[Page 77921]]

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) Except as specified in paragraph (h) of this AD: Perform all 
required actions within the compliance times specified in, and in 
accordance with, European Union Aviation Safety Agency (EASA) AD 
2023-0020, dated January 23, 2023 (EASA AD 2023-0020).
    (2) The action required by paragraph (g)(1) of this AD may be 
performed by the owner/operator (pilot) holding at least a private 
pilot certificate and must be entered into the aircraft records 
showing compliance with this AD in accordance with 14 CFR 43.9(a) 
and 91.417(a)(2)(v). The record must be maintained as required by 14 
CFR 91.417, 121.380, or 135.439.

(h) Exceptions to EASA AD 2023-0020

    (1) Where EASA AD 2023-0020 defines the AMP as ``The Aircraft 
Maintenance Programme (AMP) contains the tasks on the basis of which 
the scheduled maintenance is conducted to ensure the continuing 
airworthiness of each operated engine,'' replace that text with 
``the aircraft maintenance program containing the tasks on the basis 
of which the scheduled maintenance is conducted to ensure the 
continuing airworthiness of each operated airplane.''
    (2) Where EASA AD 2023-0020 specifies the ALS as ``The 
Airworthiness Limitations Section of the GEAC Engine Maintenance 
Manual (EMM) No. 0982309 Revision 21,'' replace that text with ``The 
Airworthiness Limitations Section of the GEAC Engine Maintenance 
Manual (EMM) No. 0982309 Revision 22.'' The ALS in Revision 22 of 
the EMM is unchanged from Revision 21.
    (3) Where EASA AD 2023-0020 refers to its effective date, this 
AD requires using the effective date of this AD.
    (4) Where paragraph (3) of EASA AD 2023-0020 specifies ``Within 
12 months after the effective date of this AD, revise the approved 
AMP,'' replace that text with ``Within 90 days after the effective 
date of this AD, revise the ALS of the existing approved engine 
maintenance or inspection program, as applicable.''
    (5) This AD does not require compliance with paragraphs (1), 
(2), (4), and (5) of EASA AD 2023-0020.
    (6) This AD does not adopt the Remarks paragraph of EASA AD 
2023-0020.

(i) Provisions for Alternative Actions and Intervals

    After performing the actions required by paragraph (g) of this 
AD, no alternative actions and associated thresholds and intervals, 
including life limits, are allowed unless they are approved as 
specified in the provisions of the ``Ref. Publications'' section of 
EASA AD 2023-0020.

(j) Terminating Action for Certain Actions Required by Affected ADs

    (1) Accomplishing the actions required by paragraph (g) of this 
AD terminates the requirements of paragraphs (g)(1) through (3) of 
AD 2021-13-07 for model M601D-11, M601E-11, M601E-11A, M601E-11AS, 
M601E-11S, and M601F engines only.
    (2) Accomplishing the actions required by paragraph (g) of this 
AD terminates the requirements of paragraphs (g)(1) through (3) of 
AD 2023-01-10 for model M601E-11, M601E-11A, M601E-11AS, M601E-11S, 
and M601F engines only.

(k) Alternative Methods of Compliance (AMOCs)

    (1) 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 local Flight 
Standards District Office, as appropriate. If sending information 
directly to the manager of the International Validation Branch, send 
it to the attention of the person identified in paragraph (l) of 
this AD and email to [email protected].
    (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.

(l) Additional Information

    For more information about this AD, contact Barbara Caufield, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; phone: (781) 238-7146; email: 
[email protected].

(m) 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 the AD specifies otherwise.
    (i) European Union Aviation Safety Agency (EASA) AD 2023-0020, 
dated January 23, 2023.
    (ii) [Reserved]
    (3) For EASA AD 2023-0020, contact EASA, Konrad-Adenauer-Ufer 3, 
50668 Cologne, Germany; phone: +49 221 8999 000; email: 
[email protected]; website: easa.europa.eu. You may find this EASA 
AD on the EASA website at ad.easa.europa.eu.
    (4) You may view this service information at 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.
    (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 www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on November 2, 2023.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-24639 Filed 11-13-23; 8:45 am]
BILLING CODE 4910-13-P