Airworthiness Directives; The Boeing Company Airplanes
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Issuing agencies
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767-200 and 767-300 series airplanes. This AD was prompted by reports of scribe lines found at skin lap joints and butt joints, around external repairs and antennas, and at locations where external decals had been cut. For some airplanes, this AD requires a detailed inspection for scribe lines and applicable related investigative and corrective actions. For other airplanes, this AD requires repetitive nondestructive testing inspections for cracking at certain stringers of the skin lap joint fuselage skin and applicable corrective actions. 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 48 (Thursday, March 12, 2026)</title>
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[Federal Register Volume 91, Number 48 (Thursday, March 12, 2026)]
[Rules and Regulations]
[Pages 12065-12068]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-04831]
[[Page 12065]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-1719; Project Identifier AD-2024-00382-T;
Amendment 39-23276; AD 2026-05-03]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain The Boeing Company Model 767-200 and 767-300 series airplanes.
This AD was prompted by reports of scribe lines found at skin lap
joints and butt joints, around external repairs and antennas, and at
locations where external decals had been cut. For some airplanes, this
AD requires a detailed inspection for scribe lines and applicable
related investigative and corrective actions. For other airplanes, this
AD requires repetitive nondestructive testing inspections for cracking
at certain stringers of the skin lap joint fuselage skin and applicable
corrective actions. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective April 16, 2026.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of April 16,
2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-1719; 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 address for Docket Operations is U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
<bullet> For Boeing material identified in this AD, contact Boeing
Commercial Airplanes, Attention: Contractual & Data Services (C&DS),
2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600;
telephone 562-797-1717; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
<bullet> For IAI-Aviation Group material identified in this AD,
contact Israel Aerospace Industries, Ltd., Ben Gurion International
Airport, Israel 7010000; telephone 972-3-9353090; website
<a href="http://www.iai.co.il/about/groups/iai-aviation-group">www.iai.co.il/about/groups/iai-aviation-group</a>.
<bullet> You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th St., Des
Moines, WA. For information on the availability of this material at the
FAA, call 206-231-3195. It is also available at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-1719.
FOR FURTHER INFORMATION CONTACT: Stefanie Roesli, Aviation Safety
Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-
231-3964; email: <a href="/cdn-cgi/l/email-protection#88fbfcedeee9e6e1eda6e6a6fae7edfbe4e1c8eee9e9a6efe7fe"><span class="__cf_email__" data-cfemail="dba8afbebdbab5b2bef5b5f5a9b4bea8b7b29bbdbabaf5bcb4ad">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain The Boeing
Company Model 767-200 and 767-300 series airplanes. The NPRM was
published in the Federal Register on July 23, 2025 (90 FR 34612). The
NPRM was prompted by reports of scribe lines found at skin lap joints
and butt joints, around external repairs and antennas, and at locations
where external decals had been cut. In the NPRM, the FAA proposed to
require, for some airplanes, a detailed inspection for scribe lines and
applicable related investigative and corrective actions. For other
airplanes, the FAA proposed to require repetitive nondestructive
testing inspections for cracking at certain stringers of the skin lap
joint fuselage skin and applicable corrective actions. The FAA is
issuing this AD to address scribe lines, which could develop into
fatigue cracks in the skin and cause rapid decompression of the
airplane.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from Boeing, United Airlines, and an
individual who supported the NPRM without change.
The FAA also received comments from Air Canada, Aviation Partners
Boeing and the Civil Aviation Authority of Israel (CAAI). The following
presents these comments and the FAA's response.
Request To Refer to Revised Intervals
CAAI and Air Canada requested that the FAA revise the 0.10 factor
for intervals specified in paragraphs (i)(4) and (5) of the proposed
AD. CAAI stated the proposed AD reduced the repetitive intervals by a
factor of 0.10 for Israel Aerospace Industries (IAI) converted 767
freighter operators. CAAI noted that the initial compliance times
factors in the proposed AD match IAI-Aviation Group Service Bulletin
368-53-073, Revision 1, and supporting analysis numbers, but the source
of the 0.10 repetitive intervals factor is unclear and seems very
conservative. CAAI stated such a factor would be very challenging for
the IAI converted 767 freighter operators. CAAI questioned why it was
decided that the proposed AD would not be referring to IAI-Aviation
Group Service Bulletin 368-53-073, Revision 1 for implementation of the
factors, but instead would directly determine the required factors. Air
Canada stated the FAA should include the limited return to service
(LRTS) repetitive inspection listed in IAI-Aviation Group Service
Bulletin 368-53-073 instead of a factor of 0.10. Air Canada stated that
although the service bulletin is more complex, it provides LRTS
repetitive inspection based on analysis instead of using a conservative
blanket reduction factor.
The FAA agrees to revise the 0.10 factor for repetitive intervals
for IAI converted 767 freighter airplanes. The FAA implemented a
conservative factor of 0.10 for the repetitive intervals in the
proposed AD because the FAA had not received an approved, published
copy of IAI-Aviation Group Service Bulletin 368-53-073. The FAA has
since received and reviewed IAI-Aviation Group Service Bulletin 368-53-
073, Revision 2, dated September 2025, which contains more
representative repetitive intervals to address the identified unsafe
condition. The FAA has revised paragraphs (h) and (i)(3) of this AD to
refer to IAI-Aviation Group Service Bulletin 368-53-073, Revision 2,
dated September 2025. The FAA has also revised paragraphs (i)(4) and
(5) of this AD to remove references to the compliance time factors and
add references to the alternative method of compliance (AMOC) paragraph
for certain actions.
Request To Provide a Grace Period
Air Canada requested that the FAA add a 24-month grace period to
introduce reduced LRTS repetitive inspections if it was applied before
the issuance of the AD, ensuring the airplane is not out of compliance
when the AD is issued.
The FAA does not agree. The commenter did not provide justification
for implementing a 24-month grace period for the LRTS program. The new
service information reduces some of the LRTS repetitive intervals, so
implementing a 24-month grace period
[[Page 12066]]
may contradict that requirement. However, under the provisions of
paragraph (l) of this AD, the FAA will consider requests for approval
of an extension of the compliance time if sufficient data are submitted
to substantiate that the new compliance time would provide an
acceptable level of safety. The FAA has not changed this AD in this
regard.
Effect of Winglets on Accomplishment of the Proposed Actions
Aviation Partners Boeing stated that accomplishing Supplemental
Type Certificate (STC) ST01920SE does not affect the actions specified
in the proposed AD.
The FAA concurs with the commenter. The FAA has redesignated
paragraph (c) of the proposed AD as paragraph (c)(1) of this AD and
added paragraph (c)(2) to this AD to state that installation of STC
ST01920SE does not affect the ability to accomplish the actions
required by this AD. Therefore, for airplanes on which STC ST01920SE is
installed, a ``change in product'' AMOC approval request is not
necessary to comply with the requirements of 14 CFR 39.17.
Clarification of Reference to the AMOC Paragraph
Paragraph (i)(2) of the proposed AD referred to paragraph (j) of
the proposed AD for approved methods of compliance. However, paragraph
(l) of the proposed AD specifies the AMOC information. The FAA has
revised paragraph (i)(2) of this AD to refer to paragraph (l) of this
AD.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting this AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. Except for minor editorial changes, and
any other changes described previously, this AD is adopted as proposed
in the NPRM. None of the changes will increase the economic burden on
any operator.
Terminating Action for a Related AD
For airplanes identified in paragraphs (c)(1)(ii) and (iii) of this
AD: Accomplishing the initial actions required by paragraph (h) of this
AD terminates the requirements of AD 2010-06-16, Amendment 39-16241 (75
FR 12670, March 17, 2010) (AD 2010-06-16).
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Boeing Alert Service Bulletin 767-53A0193,
Revision 3, dated June 27, 2024. This material specifies the following
inspections and applicable related investigative and corrective
actions:
<bullet> Repetitive detailed inspections to detect scribe lines
along applicable skin lap joints, skin butt joints, external approved
repairs, external features, decals, and fairings.
<bullet> Removal of paint and sealant from affected areas before
the initial detailed inspection.
<bullet> Related investigative actions, including low- or high-
frequency eddy current or ultrasonic inspections of the scribe lines to
detect cracks.
<bullet> Corrective actions of either repairing scribe lines and
cracks or contacting Boeing for repair instructions and doing the
repair.
<bullet> Repair of scribe lines before further flight, except when
an LRTS program for qualifying scribe lines would allow return to
service for a limited period before scribe lines are repaired. The LRTS
program includes repetitive inspections to detect cracks where scribe
lines are found. To qualify for an LRTS program, scribe lines must meet
certain criteria based on their depth and location.
<bullet> Contacting Boeing for final repair instructions, which
would eliminate the need for the repetitive inspections of the LRTS
program.
This material notes that certain inspections would not be required
under the following conditions, depending on location:
<bullet> The airplane had never been stripped or repainted.
<bullet> The airplane had never been stripped or repainted under
the wing-to-body fairings.
<bullet> Correct sealant removal procedures have been used at all
times since delivery.
This material also specifies procedures for nondestructive testing
inspections for cracking of the skin lap joint fuselage skin at
stringers S-26L and S-8R between station (STA) 434 and STA 676 (for
Group 13 airplanes), and at S-26L, S-8R, and S-2R between STA 434 and
STA 654+121 (for Group 14 airplanes).
The FAA also reviewed IAI-Aviation Group Service Bulletin 368-53-
073, Revision 2, dated September 2025. This material provides adjusted
intervals for inspections for LRTS repetitive inspections of scribe
lines lap joints.
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.
Costs of Compliance
The FAA estimates that this AD affects 3 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
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Inspection....................... Up to 340 work- $0 Up to $28,900 per Up to $86,700 per
hours x $85 per inspection cycle. inspection cycle.
hour = $28,900.
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The extent of scribe lines found during the inspections could vary
significantly from airplane to airplane. The FAA has no way of
determining the extent of scribe lines found on each airplane, the cost
to repair each airplane, or the number of airplanes that may require
repair.
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.
[[Page 12067]]
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,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will 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 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:
2026-05-03 The Boeing Company: Amendment 39-23276; Docket No. FAA-
2025-1719; Project Identifier AD-2024-00382-T.
(a) Effective Date
This airworthiness directive (AD) is effective April 16, 2026.
(b) Affected ADs
This AD affects AD 2010-06-16, Amendment 39-16241 (75 FR 12670,
March 17, 2010) (AD 2010-06-16).
(c) Applicability
(1) This AD applies to The Boeing Company Model 767-200 and 767-
300 series airplanes, certificated in any category, listed in
paragraphs (c)(1)(i) through (iii) of this AD.
(i) Airplanes identified as Group 13 and 14 in Boeing Alert
Service Bulletin 767-53A0193, Revision 3, dated June 27, 2024.
(ii) Model 767-200 series airplanes converted to a special
freighter by Supplemental Type Certificate (STC) ST01433SE.
(iii) Model 767-300 series airplanes converted to a special
freighter by STC ST02040SE.
(2) Installation of STC ST01920SE does not affect the ability to
accomplish the actions required by this AD. Therefore, for airplanes
on which STC ST01920SE is installed, a ``change in product''
alternative method of compliance (AMOC) approval request is not
necessary to comply with the requirements of 14 CFR 39.17.
(d) Subject
Air Transport Association (ATA) of America Code 53, Fuselage.
(e) Unsafe Condition
This AD was prompted by reports of scribe lines found at skin
lap joints and butt joints, around external repairs and antennas,
and at locations where external decals had been cut. The FAA is
issuing this AD to address scribe lines, which could develop into
fatigue cracks in the skin and cause rapid decompression of the
airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions: Group 13 and 14 Airplanes
For airplanes identified in paragraph (c)(1)(i) of this AD:
Except as specified in paragraphs (i)(1) and (2) of this AD, at the
applicable times specified in tables 1.1 and 1.2 under the
``Compliance'' paragraph of Boeing Alert Service Bulletin 767-
53A0193, Revision 3, dated June 27, 2024, do the actions specified
in, and in accordance with, the ``Action'' column and footnotes of
tables 1.1 and 1.2 under the ``Compliance'' paragraph of Boeing
Alert Service Bulletin 767-53A0193, Revision 3, dated June 27, 2024.
(h) Required Actions: STC-Modified Airplanes
For airplanes identified in paragraphs (c)(1)(ii) and (iii) of
this AD: Except as specified in paragraphs (i)(2) through (5) of
this AD, at the applicable times specified in the Accomplishment
Instructions of IAI-Aviation Group Service Bulletin 368-53-073,
Revision 2, dated September 2025, do detailed inspections for scribe
lines of skin lap joints around external repairs and antennas and at
locations where external decals might have been cut, and do all
applicable related investigative and corrective actions, by
accomplishing all applicable actions specified in the Accomplishment
Instructions of Boeing Alert Service Bulletin 767-53A0193, Revision
3, dated June 27, 2024. The inspection exemptions noted in paragraph
2., ``Accomplishment Instructions'' of IAI-Aviation Group Service
Bulletin 368-53-073, Revision 2, dated September, apply to actions
required by this paragraph.
(i) Exceptions to Service Bulletin Specifications
(1) Where the Compliance Time columns in tables 1.1 and 1.2
under the ``Compliance'' paragraph of Boeing Alert Service Bulletin
767-53A0193, Revision 3, dated June 27, 2024, refer to the
``revision 03 issue date of this service bulletin,'' this AD
requires using the effective date of this AD.
(2) Where Boeing Alert Service Bulletin 767-53A0193, Revision 3,
dated June 27, 2024, specifies contacting Boeing for repair
instructions, this AD requires doing the repair using a method
approved in accordance with the procedures in paragraph (l) of this
AD.
(3) Where paragraph 1) of the Accomplishment Instructions of
IAI-Aviation Group Service Bulletin 368-53-073, Revision 2, dated
September 2025, refers to applying applicable factors to ``the
initial inspection threshold,'' for this AD, apply the applicable
factors to the applicable initial compliance times specified in the
``Compliance'' paragraph of Boeing Alert Service Bulletin 767-
53A0193, Revision 3, dated June 27, 2024. Where the Compliance Time
columns in the tables under the ``Compliance'' paragraph of Boeing
Alert Service Bulletin 767-53A0193, Revision 3, dated June 27, 2024,
refer to the ``the original issue date on this service bulletin,''
this AD requires using the effective date of this AD.
Note 1 to paragraph (i)(3): For Model 767-200 airplanes, the new
compliance times are 60% of the original initial compliance time.
For example, an initial compliance time of 25,000 total flight
cycles is reduced to 15,000 total flight cycles (i.e., 25,000 x 0.60
= 15,000).
Note 2 to paragraph (i)(3): For Model 767-300 airplanes, the new
compliance times are 46% of the original initial compliance time.
For example, an initial compliance time of 25,000 total flight
cycles is reduced to 11,500 total flight cycles (i.e., 25,000 x 0.46
= 11,500).
(4) Where IAI-Aviation Group Service Bulletin 368-53-073,
Revision 2, dated September 2025, specifies contacting IAI for
inspections or repair instructions, this AD requires doing the
inspections and repairs using a method approved in accordance with
the procedures in paragraph (l) of this AD.
(5) Where IAI-Aviation Group Service Bulletin 368-53-073,
Revision 2, dated September 2025, specifies contacting Boeing for
inspection and repair instructions, this AD requires doing the
inspection and repair using a method approved in accordance with the
procedures in paragraph (l) of this AD.
(j) Terminating Action for STC-Modified Airplanes
For airplanes identified in paragraphs (c)(1)(ii) and (iii) of
this AD: Accomplishing the initial actions required by paragraph (h)
of this AD terminates the requirements of AD 2010-06-16.
(k) Credit for Previous Actions
For airplanes identified in paragraphs (c)(1)(ii) and (iii) of
this AD: This paragraph provides credit for the actions required by
paragraph (h) of this AD, if those actions were performed before the
effective date of this AD using Boeing Alert Service Bulletin 767-
53A0193, Revision 2, dated August 26, 2010.
[[Page 12068]]
(l) 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
responsible Flight Standards 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
(m)(1) of this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#b5f4f8faf6f5d3d4d49bd2dac3"><span class="__cf_email__" data-cfemail="ca8b8785898aacababe4ada5bc">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards Office.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair, modification, or alteration required by this AD
if it is approved by The Boeing Company Organization Designation
Authorization (ODA) that has been authorized by the Manager, AIR-
520, Continued Operational Safety Branch, FAA, to make those
findings. To be approved, the repair method, modification deviation,
or alteration deviation must meet the certification basis of the
airplane, and the approval must specifically refer to this AD.
(m) Related Information
(1) For more information about this AD, contact Stefanie Roesli,
Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA
98198; phone: 206-231-3964; email: <a href="/cdn-cgi/l/email-protection#a4d7d0c1c2c5cacdc18aca8ad6cbc1d7c8cde4c2c5c58ac3cbd2"><span class="__cf_email__" data-cfemail="681b1c0d0e0906010d4606461a070d1b0401280e0909460f071e">[email protected]</span></a>.
(2) Material identified in this AD that is not incorporated by
reference is available at the address specified in paragraph (n)(3)
of this AD.
(n) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference 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.
(i) Boeing Alert Service Bulletin 767-53A0193, Revision 3, dated
June 27, 2024.
(ii) IAI-Aviation Group Service Bulletin 368-53-073, Revision 2,
dated September 2025.
(3) For Boeing material identified in this AD, contact Boeing
Commercial Airplanes, Attention: Contractual & Data Services (C&DS),
2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600;
telephone 562-797-1717; website <a href="http://myboeingfleet.com">myboeingfleet.com</a>.
(4) For IAI-Aviation Group material identified in this AD,
contact Israel Aerospace Industries, Ltd., Ben Gurion International
Airport, Israel 7010000; telephone 972-3-9353090; website
<a href="http://www.iai.co.il/about/groups/iai-aviation-group">www.iai.co.il/about/groups/iai-aviation-group</a>.
(5) You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th St.,
Des Moines, WA. For information on the availability of this material
at the FAA, call 206-231-3195.
(6) 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#bed8cc90d7d0cdcedbddcad7d1d0fed0dfccdf90d9d1c8"><span class="__cf_email__" data-cfemail="a1c7d38fc8cfd2d1c4c2d5c8cecfe1cfc0d3c08fc6ced7">[email protected]</span></a>.
Issued on February 24, 2026.
Peter A. White,
Deputy Director, Integrated Certificate Management Division, Aircraft
Certification Service.
[FR Doc. 2026-04831 Filed 3-11-26; 8:45 am]
BILLING CODE 4910-13-P
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