Rule2026-04331
Airworthiness Directives; Textron Aviation, Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes
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
March 4, 2026
Effective
March 13, 2026
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is correcting an airworthiness directive (AD) that was published in the Federal Register. That AD applies to all Textron Aviation, Inc., Model 525B airplanes. As published, there was an error in Table 1 to paragraph (g) of the AD. This document corrects that error. In all other respects, the original document remains the same.
Full Text
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<title>Federal Register, Volume 91 Issue 42 (Wednesday, March 4, 2026)</title>
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[Federal Register Volume 91, Number 42 (Wednesday, March 4, 2026)]
[Rules and Regulations]
[Pages 10508-10510]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-04331]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-5037; Project Identifier AD-2025-00212-A;
Amendment 39-23255; AD 2026-03-06]
RIN 2120-AA64
Airworthiness Directives; Textron Aviation, Inc. (Type
Certificate Previously Held by Cessna Aircraft Company) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; correction.
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SUMMARY: The FAA is correcting an airworthiness directive (AD) that was
published in the Federal Register. That AD applies to all Textron
Aviation, Inc., Model 525B airplanes. As published, there was an error
in Table 1 to paragraph (g) of the AD. This document corrects that
error. In all other respects, the original document remains the same.
DATES: This correction is effective March 13, 2026. The effective date
of AD 2026-03-06 remains March 13, 2026.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-5037, 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.
[[Page 10509]]
FOR FURTHER INFORMATION CONTACT: Soban Saeed, Aviation Safety Engineer,
FAA, 1801 South Airport Road, Wichita, KS 67209; phone: (316) 946-4123;
email: <a href="/cdn-cgi/l/email-protection#135050513e505c40537572723d747c65"><span class="__cf_email__" data-cfemail="1556565738565a46557374743b727a63">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
AD 2026-03-06, Amendment 39-23255 (91 FR 5283, February 6, 2026)
(AD 2026-03-06), requires revising the Airworthiness Limitations
Section (ALS) of the existing aircraft maintenance manual (AMM) or
instructions for continued airworthiness (ICA) and the existing
approved maintenance or inspection program, as applicable, for all
Textron Aviation, Inc., Model 525B airplanes.
Need for Correction
As published, there is an error in Table 1 to paragraph (g)--
Revised Model 525B Airworthiness Limitation Tasks of the AD.
Specifically, Task Number 54-50-00-250, Inspection Document incorrectly
references 4-12-MI. The correct reference is 4-12-NA.
Correction of Publication
This document corrects an error and correctly adds the AD as an
amendment to 14 CFR 39.13. Although no other part of the preamble or
regulatory information has been corrected, the FAA is publishing the
entire rule in the Federal Register.
The effective date of this AD remains March 13, 2026.
Since this action only corrects one typographical error and does
not affect compliance with the AD, it has no adverse economic impact
and imposes no additional burden on any person. Therefore, the FAA has
determined that notice and public comment procedures are unnecessary.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends part 39 of
the Federal Aviation Regulations (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 [Corrected]
0
2. The FAA amends Sec. 39.13 by adding the following airworthiness
directive:
2026-03-06 Textron Aviation, Inc.: Amendment 39-23255; Docket No.
FAA-2025-5037; Project Identifier AD-2025-00212-A.
(a) Effective Date
This airworthiness directive (AD) is effective March 13, 2026.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Textron Aviation, Inc. (Type Certificate
previously held by Cessna Aircraft Company) Model 525B airplanes,
certificated in any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 5530, Vertical
Stabilizer Structure; 5415, Nacelle/Pylon, Attach Fittings.
(e) Unsafe Condition
This AD was prompted by the manufacturer's revision of the
aircraft maintenance manual (AMM) to introduce more restrictive
inspection intervals. The FAA is issuing this AD to prevent
undetected cracks in the engine mount and vertical stabilizer front
and rear spar caps. The unsafe condition, if not addressed, could
result in reduced structural integrity and consequent reduced
controllability of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Airworthiness Limitations Section (ALS) Revision
Within 150 hours time-in-service (TIS) or 12 months after the
effective date of this AD, whichever occurs first: Revise the ALS of
the existing AMM or instructions for continued airworthiness (ICA)
and the existing approved maintenance or inspection program, as
applicable, by incorporating the information identified in table 1
to paragraph (g) of this AD.
Table 1 to Paragraph (g)--Revised Model 525B Airworthiness Limitation Tasks
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Existing task Revised task Inspection
Task No. Task title interval interval document Zone
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54-50-00-250........ Forward Engine 6,000 hours TIS... 6,100 hours TIS, 4-12-NA 411, 412
Mount Channel then 4,100 hours
Flange (Eddy TIS thereafter.
Current) Special
Detailed
Inspection.
54-50-00-252........ Aft Engine Beam 11,500 hours TIS.. 14,100 hours TIS, 4-12-MR 311, 312
Aft Upper Angle then every 2,700
Common to Aft hours TIS
Web, BL 24.50 thereafter.
(Eddy Current)
Special Detailed
Inspection.
54-50-00-254........ Forward Engine 12,000 hours TIS.. 16,300 hours TIS, 4-12-MS 410, 420
Mount Aft Channel then every 11,600
Web (Eddy hours TIS
Current) Special thereafter.
Detailed
Inspection.
54-50-00-255........ Forward Engine 12,000 hours TIS.. 15,600 hours TIS, 4-12-NB 410, 420
Mount Forward then every 11,100
Channel Web (Eddy hours TIS
Current) Special thereafter.
Detailed
Inspection.
55-40-00-250........ Vertical Fin Left 9,000 hours TIS, 9,000 hours TIS, 4-12-ML 340
and Right Front then every 7,500 then every 7,000
Spar Cap at hours TIS hours TIS
Attachment Hole thereafter. thereafter.
#2 (Eddy Current)
Special Detailed
Inspection.
55-40-00-251........ Vertical Fin Left 15,000 hours TIS.. 17,700 hours TIS, 4-12-MO 340
and Right Front then every 14,900
Spar Cap at hours TIS
Attachment Hole thereafter.
#1 (Eddy Current)
Special Detailed
Inspection.
[[Page 10510]]
55-40-00-252........ Vertical Fin Left 15,000 hours TIS, 23,600 hours TIS, 4-12-MQ 340
and Right Rear then every 14,500 then every 12,100
Spar Cap at hours TIS hours TIS
Attachment Hole thereafter. thereafter.
#1 (Eddy Current)
Special Detailed
Inspection.
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Note 1 to paragraph (g): Additional guidance for accomplishing
the actions required by this AD can be found in Textron Aviation
Service Letter SL525B-05-04, Revision 1, dated January 7, 2025.
(h) Provisions for Alternative Actions and Intervals
After the action required by paragraph (g) of this AD has been
done, no alternative actions and associated thresholds and intervals
are allowed unless they are approved as specified in the provisions
of paragraph (i) of this AD.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Central Certification 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 Central Certification Branch, send it
to the attention of the person identified in paragraph (j)(1) of
this AD and email to: <a href="/cdn-cgi/l/email-protection#99d8d4d6dad9fff8f8b7fef6ef"><span class="__cf_email__" data-cfemail="f0b1bdbfb3b0969191de979f86">[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) Additional Information
(1) For more information about this AD, contact Soban Saeed,
Aviation Safety Engineer, FAA, 1801 South Airport Road, Wichita, KS
67209; phone: (316) 946-4123; email: <a href="/cdn-cgi/l/email-protection#195a5a5b345a564a597f7878377e766f"><span class="__cf_email__" data-cfemail="7e3d3d3c533d312d3e181f1f50191108">[email protected]</span></a>.
(2) For Textron Aviation material identified in this AD that is
not incorporated by reference, contact Textron Aviation, Inc., P.O.
Box 7706, Wichita, KS 67277; phone: (316) 517-6215; email:
<a href="/cdn-cgi/l/email-protection#c5a6acb1a4b1acaaabb5b0a7b685b1bdb1a4b3eba6aaa8"><span class="__cf_email__" data-cfemail="5a39332e3b2e3335342a2f38291a2e222e3b2c74393537">[email protected]</span></a>; website: <a href="http://ww2.txtav.com/technicalpublications/">ww2.txtav.com/technicalpublications/</a>.
(k) Material Incorporated by Reference
None.
Issued on February 27, 2026.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2026-04331 Filed 3-3-26; 8:45 am]
BILLING CODE 4910-13-P
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