Airworthiness Directives; Lycoming Engines

Issuing agencies

Abstract

The FAA is superseding Airworthiness Directive (AD) 2026-17- 10, which applied to Lycoming Engines (Lycoming) Model O-235, O-540, and IO-540 engines with a certain piston pin installed. AD 2026-17-10 required replacement of the affected piston pin with a part eligible for installation and, for certain engines, oil change and visual inspection of the engine oil filter, oil pressure screen, and oil suction screen for metal particulates. AD 2026-17-10 also prohibited the installation of an affected piston pin on any engine. Since the FAA issued AD 2026-17-10, the manufacturer has identified additional Lycoming Model engines that are subject to the unsafe condition, and the FAA determined the need to clarify the definition for an "affected piston pin," and include corrective action for engine models that were not listed in the manufacturer's service material. This AD requires replacement of the affected piston pin with a part eligible for installation and, for certain engines, oil change and visual inspection of the engine oil filter, oil pressure screen, and oil suction screen for metal particulates. This AD also prohibits the installation of an affected piston pin on any engine. This AD also expands the applicability to include additional affected engines with a certain piston pin installed. The FAA is issuing this AD to address the unsafe condition on these products.

Full Text

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<title>Federal Register, Volume 91 Issue 215 (Monday, November 9, 2026)</title>
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[Federal Register Volume 91, Number 215 (Monday, November 9, 2026)]
[Rules and Regulations]
[Pages 70781-70784]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-22785]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2026-13797; Project Identifier AD-2026-01052-E; 
Amendment 39-23515; AD 2026-22-13]
RIN 2120-AA64


Airworthiness Directives; Lycoming Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

-----------------------------------------------------------------------

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2026-17-
10, which applied to Lycoming Engines (Lycoming) Model O-235, O-540, 
and IO-540 engines with a certain piston pin installed. AD 2026-17-10 
required replacement of the affected piston pin with a part eligible 
for installation and, for certain engines, oil change and visual 
inspection of the engine oil filter, oil pressure screen, and oil 
suction screen for metal particulates. AD 2026-17-10 also prohibited 
the installation of an affected piston pin on any engine. Since the FAA 
issued AD 2026-17-10, the manufacturer has identified additional 
Lycoming Model engines that are subject to the unsafe condition, and 
the FAA determined the need to clarify the definition for an ``affected 
piston pin,'' and include corrective action for engine models that were 
not listed in the manufacturer's service material. This AD requires 
replacement of the affected piston pin with a part eligible for 
installation and, for certain engines, oil change and visual inspection 
of the engine oil filter, oil pressure screen, and oil suction screen 
for metal particulates. This AD also prohibits the installation of an 
affected piston pin on any engine. This AD also expands the 
applicability to include additional affected engines with a certain 
piston pin installed. The FAA is issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective November 24, 2026.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of November 24, 
2026.
    The Director of the Federal Register approved the incorporation by 
reference of a certain other publication listed in this AD as of 
September 14, 2026 (91 FR 55451, August 28, 2026).
    The FAA must receive comments on this AD by December 24, 2026.

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-2026-13797; 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.
    Material Incorporated by Reference:
    <bullet> For Lycoming material identified in this AD, contact 
Lycoming Engines, 652 Oliver Street, Williamsport, PA 17701; phone: 
(800) 258-3279; website: <a href="http://lycoming.com/contact/knowledge-base/publications">lycoming.com/contact/knowledge-base/publications</a>.
    <bullet> You may view this material 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. It is also available at 
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2026-13797.

FOR FURTHER INFORMATION CONTACT: Ramanpreet Singh, Aviation Safety 
Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; phone: 
(516) 228-7300; email: <a href="/cdn-cgi/l/email-protection#2a6f6968076965796a4c4b4b044d455c"><span class="__cf_email__" data-cfemail="c88d8b8ae58b879b88aea9a9e6afa7be">[email&#160;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 using a method listed under 
the ADDRESSES section. Include ``Docket No. FAA-2026-13797; Project 
Identifier AD-2026-01052-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

[[Page 70782]]

should be sent to Ramanpreet Singh, Aviation Safety Engineer, FAA, 1701 
Columbia Avenue, College Park, GA 30337. 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 2026-17-10, Amendment 39-23454 (91 FR 55451, 
August 28, 2026) (AD 2026-17-10), for Lycoming Model O-235, O-540, and 
IO-540 engines with a certain piston pin installed. AD 2026-17-10 
required replacement of the affected piston pin with a part eligible 
for installation and, for certain engines, oil change and visual 
inspection of the engine oil filter, oil pressure screen, and oil 
suction screen for metal particulates. AD 2026-17-10 was prompted by 
several reports of piston pin failure that resulted in metal 
particulate contamination in the engine oil and engine failure. The FAA 
issued AD 2026-17-10 to prevent failure of the piston pin.

Actions Since AD 2026-17-10 Was Issued

    Since the FAA issued AD 2026-17-10, the manufacturer has identified 
additional Lycoming Model engines that are subject to the unsafe 
condition and identified Lycoming Model engines that were included in 
the applicability of AD 2026-17-10 that are not subject to the unsafe 
condition. Additionally, the FAA determined the need to clarify the 
applicability, the definition for an ``affected piston pin,'' and 
corrective actions. 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.

Material Incorporated by Reference Under 1 CFR part 51

    The FAA reviewed Lycoming Service Instruction No. 1009BF, dated 
July 20, 2026, which identifies the compliance times between overhauls 
for certain Lycoming Model engines.
    This AD also requires the following material, which the Director of 
the Federal Register approved for incorporation by reference as of 
September 14, 2026 (91 FR 55451, August 28, 2026).
    <bullet> Lycoming Mandatory Service Bulletin No. (MSB) 667A, dated 
March 12, 2026 (Lycoming MSB 667A).
    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.

AD Requirements

    This AD requires replacement of the affected piston pin with a part 
eligible for installation and, for certain engines, oil change and 
visual inspection of the engine oil filter, oil pressure screen, and 
oil suction screen for metal particulates. This AD also prohibits the 
installation of an affected piston pin on any engine. This AD also 
expands the applicability to include additional affected engines with a 
certain piston pin installed.

Differences Between This AD and the Referenced Material

    This AD requires oil change and visual inspection of the engine oil 
filter, oil pressure screen, and oil suction screen for metal 
particulates within 5 hours time-in-service (TIS), while Lycoming MSB 
667A does not have this requirement.

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 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 forgoing notice and comment prior to adoption of this rule 
because piston pin microcracks and inclusions are difficult to detect 
prior to failure, and can result in internal damage to the engine, in-
flight shutdown, and loss of control of the airplane. The FAA has 
determined that affected engines will need to be inspected and have 
affected piston pins replaced within 25 hours TIS or earlier after the 
effective date of this AD depending on the engine model. Additionally, 
the compliance time in this AD is shorter than the time necessary for 
the public to comment and for publication of the 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).
    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 forgo notice and 
comment.

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 957 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
----------------------------------------------------------------------------------------------------------------
Piston pin replacement, oil change,     25 work-hours x $85 per           $2,200          $4,325      $4,139,025
 and oil inspection.                     hour = $2,125.
----------------------------------------------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some of the costs of this 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

[[Page 70783]]

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:
0
a. Removing Airworthiness Directive 2026-17-10, Amendment 39-23454 (91 
FR 55451, August 28, 2026); and
0
b. Adding the following new airworthiness directive:

2026-22-13 Lycoming Engines: Amendment 39-23515; Docket No. FAA-
2026-13797; Project Identifier AD-2026-01052-E.

(a) Effective Date

    This airworthiness directive (AD) is effective November 24, 
2026.

(b) Affected ADs

    This AD replaces AD 2026-17-10, Amendment 39-23454 (91 FR 55451, 
August 28, 2026).

(c) Applicability

    This AD applies to Lycoming Engines (Lycoming) Model engines 
identified in table 1 to paragraph (c) of this AD with an installed 
piston pin having part number (P/N) LW-13445 that was manufactured 
between January 7, 2021 to December 15, 2025. If the date of 
manufacture for the piston pin cannot be determined, this AD is 
applicable. If the current piston pins (P/N LW-13445) were installed 
prior to January 7, 2021, this AD is not applicable.

            Table 1 to Paragraph (c)--Lycoming Model Engines
------------------------------------------------------------------------
        Engine series                         Engine model
------------------------------------------------------------------------
O-235........................  -C1, -C1A, -C1B, -C1C, -C2A, -C2B, -C2C,
                                E1, -E1B, -E2A, -E2B, -F1, -F1B, -F2A, -
                                F2B, -G1, -G1B, -G2A, -G2B, -H2C, -J2A,
                                J2B, -K2A, -K2B, -K2C, -L2A, -L2C, -M1,
                                M2C, -M3C, -N2A, -N2C, -P1, -P2A, -P2C,
                                P3C.
O-320........................  -A1A, -A1B, -A2A, -A2B, -A2C, -A2D, -A3A,
                                -A3B, -A3C, -B1A, -B1B, -B2A, -B2B, -
                                B2C, -B2D, -B2E, -B3A, -B3B, -B3C, -D1A,
                                -D1B, -D1C, -D1D, -D1F, -D2A, -D2B, -
                                D2C, -D2F, -D2J, -D3G, -E1A, -E1B, -E1C,
                                -E1F, -E1J, -E2A, -E2B, -E2C, -E2D, -
                                E2F, -E2G, -E2H, -E3D, -E3H.
IO-320.......................  -B1A, -B1C, -B1D, -B1E, -B2A, -C1A,-C1B,
                                D1A, -D1B, -D1C, -E1A, -E1B, -E2A,-E2B.
AIO-320......................  -A1B, -B1B, -C1B.
LIO-320......................  -B1A, -C1A.
AEIO-320.....................  -D1B, -D2B, -E1A, -E1B, -E2A, -E2B.
VO-435.......................  -A1A (O-435-21), -A1B (O-435-6), -A1C (O-
                                435-23, -23A, -23B, -23C), -A1D (O-435-
                                6A), -A1E, -A1F, -B1A.
TVO-435......................  -A1A, -B1A (O-435-25A), -B1B, -C1A, -D1A,
                                -D1B, -E1A, -F1A, -G1A, -G1B.
O-540........................  -J1A5D, -J1B5D, -J1C5D, -J1D5D, -J2A5D, -
                                J2B5D, -J2C5D, -J2D5D, -J3A5, -J3A5D, -
                                J3C5D, -L3C5D.
IO-540.......................  -AB1A5, -J4A5, -W1A5, -W1A5D, -W3A5D.
------------------------------------------------------------------------

(d) Subject

    Joint Aircraft System Component (JASC) Code 8530, Reciprocating 
Engine Cylinder Section.

(e) Unsafe Condition

    This AD was prompted by reports from Lycoming of metal 
particulates found in the engine oil during oil change and two non-
detectable engine failures. The FAA is issuing this AD to prevent 
failure of the piston pin. The unsafe condition, if not addressed, 
could result in engine failure, loss of thrust control, in-flight 
shutdown, damage to the airplane, and loss of control of the 
airplane.

(f) Compliance

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

(g) Definitions

    (1) For the purpose of this AD, a ``part eligible for 
installation'' is one of the following:
    (i) A piston pin that does not have P/N LW-13445.
    (ii) A piston pin having P/N LW-13445 that was not manufactured 
between January 7, 2021 to December 15, 2025.
    (2) For the purpose of this AD, an ``affected piston pin'' is a 
piston pin having P/N LW-13445 and one of the following:
    (i) A date of manufacture between January 7, 2021 to December 
15, 2025.
    (ii) A date of manufacture that is unknown.
    (3) For the purpose of this AD, Group 1 engines are all affected 
engines, except engines with an installed piston pin having P/N LW-
13445 with a manufacture date between March 23, 2023 to December 15, 
2025, or an installed piston pin having P/N LW-13445 with a 
manufacture date that is unknown.
    (4) For the purpose of this AD, Group 2 engines are engines with 
an installed piston pin having P/N LW-13445 with a manufacture date 
between March 23, 2023 to December 15, 2025, or an installed piston 
pin having P/N LW-13445 with a manufacture date that is unknown.

(h) Required Actions

    (1) For Group 1 and Group 2 engines, except for Group 2 engines 
with greater than or equal to 150 hours time in service (TIS)

[[Page 70784]]

as of the effective date of this AD, within 5 hours TIS after the 
effective date of this AD, perform an oil change and visual 
inspection of the engine oil filter, oil pressure screen, and oil 
suction screen for metal particulates.

    Note 1 to paragraph (h)(1): Guidance for engine oil filter, oil 
pressure screen, and oil suction screen inspection instructions and 
identification of metallic solids may be found in Lycoming Mandatory 
Service Bulletin No. (MSB) No. 480F, dated May 25, 2017.

    (2) If any metal particulates are found during the oil change 
and inspection required by paragraph (h)(1) of this AD, before 
further flight, replace any affected piston pin with a part eligible 
for installation in accordance with the Required Action of Lycoming 
MSB 667A, dated March 12, 2026 (Lycoming MSB 667A), as applicable to 
engine model.
    (3) For Group 1 engines with an installed piston pin with a 
manufacture date between January 07, 2021, to March 22, 2023, where 
metal particulates were not found during the oil change and 
inspection required by paragraph (h)(1) of this AD, at the next 
maintenance event requiring the removal of a cylinder assembly with 
an affected piston pin, or at the next engine overhaul not to exceed 
the time between overhaul specified in Lycoming Service Instruction 
No. 1009BF, dated July 20, 2026, whichever occurs first after the 
effective date of this AD, replace any affected piston pin with a 
part eligible for installation in accordance with the Required 
Action of Lycoming MSB 667A, as applicable to engine model.
    (4) For Group 2 engines with greater than or equal to 150 hours 
TIS as of the effective date of this AD, before further flight, 
replace any affected piston pin with a part eligible for 
installation in accordance with the Required Action of Lycoming MSB 
667A, as applicable to engine model.
    (5) For Group 2 engines with less than 150 hours TIS as of the 
effective date of this AD, within 25 hours TIS after the effective 
date of this AD but before or upon reaching 150 total hours TIS 
since installation of the affected piston pins, whichever comes 
first after the effective date of this AD, replace any affected 
piston pin with a part eligible for installation in accordance with 
the Required Action of Lycoming MSB 667A, as applicable to engine 
model.

(i) Installation Prohibition

    After the effective date of this AD, do not install an affected 
piston pin as defined in paragraph (g)(2) of this AD on any engine.

(j) No Return of Parts

    Although the service material specifies returning certain parts 
to the manufacturer, this AD does not include those requirements.

(k) Special Flight Permits

    (1) Special flight permits may be issued in accordance with 14 
CFR 21.197 and 21.199199 for the replacement requirements of this AD 
provided no metal particulates are found during the inspection 
required by this AD. For Group 2 engines that are not affected by 
paragraph (h)(1) of this AD, an oil change showing that no metal 
particulates are present would be required prior to issuing a 
special flight permit.
    (2) Special flight permits, as described in 14 CFR 21.197 and 
21.199, are not allowed for the visual inspection of the engine oil 
filter, oil pressure screen, and oil suction screen for metal 
particulates requirement of this AD.

(l) Alternative Methods of Compliance (AMOCs)

    The Manager, East Certification Branch, FAA, has the authority 
to approve AMOCs for this AD, if requested using the procedures 
found in14 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 East Certification Branch, send it to the 
attention of the person identified in paragraph (m)(1) of this AD 
and email to: <a href="/cdn-cgi/l/email-protection#6c2d21232f2c0a0d0d420b031a"><span class="__cf_email__" data-cfemail="ce8f83818d8ea8afafe0a9a1b8">[email&#160;protected]</span></a>. 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.

(m) Additional Information

    (1) For more information about this AD, contact Ramanpreet 
Singh, Aviation Safety Engineer, FAA, Ramanpreet Singh, Aviation 
Safety Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; 
phone: (516) 228-7300; email: <a href="/cdn-cgi/l/email-protection#f4b1b7b6d9b7bba7b4929595da939b82"><span class="__cf_email__" data-cfemail="703533325d333f23301611115e171f06">[email&#160;protected]</span></a>.
    (2) Material identified in this AD that is not incorporated by 
reference is available at the address specified in paragraph (n)(4) 
of this AD.

(n) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the material listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless the AD specifies otherwise.
    (3) The following material was approved for IBR November 24, 
2026.
    (i) Lycoming Service Instruction No. 1009BF, dated July 20, 
2026.
    (ii) [Reserved]
    (4) The following material was approved for IBR on September 14, 
2026. (91 FR 55451, August 28, 2026).
    (i) Lycoming Mandatory Service Bulletin No. (MSB) 667A, dated 
March 12, 2026.
    (ii) [Reserved]
    (5) For Lycoming material identified in this AD, contact 
Lycoming Engines, 652 Oliver Street, Williamsport, PA 17701; phone: 
(800) 258-3279; website: <a href="http://lycoming.com/contact/knowledge-base/publications">lycoming.com/contact/knowledge-base/publications</a>.
    (6) You may view this material 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.
    (7) 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#7412065a1d1a07041117001d1b1a341a1506155a131b02"><span class="__cf_email__" data-cfemail="4523376b2c2b36352026312c2a2b052b2437246b222a33">[email&#160;protected]</span></a>.

    Issued on October 30, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2026-22785 Filed 11-5-26; 11:15 am]
BILLING CODE 4910-13-P


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