Proposed Rule2025-03403
Airworthiness Directives; Textron Aviation, Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes
Primary source
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Published
March 7, 2025
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain Textron Aviation, Inc., Model 560 and 560XL airplanes. This proposed AD was prompted by reports of mis-wired fire extinguishing bottles. This proposed AD would require an engine fire extinguisher system functional test, an inspection of the fire extinguisher bottle cartridge wire numbers and yellow ID sleeves for proper identification and legibility, and applicable corrective actions. This proposed AD would also require revising the existing inspection program to incorporate new airworthiness limitations for repetitive inspections of the engine fire extinguisher wiring and, as applicable, auxiliary power unit (APU) fire extinguisher wiring. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 90 Issue 44 (Friday, March 7, 2025)</title>
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[Federal Register Volume 90, Number 44 (Friday, March 7, 2025)]
[Proposed Rules]
[Pages 11495-11498]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-03403]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-0334; Project Identifier AD-2024-00108-T]
RIN 2120-AA64
Airworthiness Directives; Textron Aviation, Inc. (Type
Certificate Previously Held by Cessna Aircraft Company) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Textron Aviation, Inc., Model 560 and 560XL airplanes. This
proposed AD was prompted by reports of mis-wired fire extinguishing
bottles. This proposed AD would require an engine fire extinguisher
system functional test, an inspection of the fire extinguisher bottle
cartridge wire numbers and yellow ID sleeves for proper identification
and legibility, and applicable corrective actions. This proposed AD
would also require revising the existing inspection program to
incorporate new airworthiness limitations for repetitive inspections of
the engine fire extinguisher wiring and, as applicable, auxiliary power
unit (APU) fire extinguisher wiring. The FAA is proposing this AD to
address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by April 21,
2025.
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
[[Page 11496]]
No. FAA-2025-0334; 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, any comments received, and other information. The
street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For Textron Aviation material in this proposed AD, contact
Textron Aviation, Inc., P.O. Box 7706, Wichita, KS 67277; telephone
316-517-6215; fax 316-517-5802; email <a href="/cdn-cgi/l/email-protection#d7b4bea3b6a3beb8b9a7a2b5a497a3afa3b6a1f9b4b8ba"><span class="__cf_email__" data-cfemail="583b312c392c313736282d3a2b182c202c392e763b3735">[email protected]</span></a>; website
<a href="http://support.cessna.com/custsupt/csupport/newlogin.jsp">support.cessna.com/custsupt/csupport/newlogin.jsp</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.
FOR FURTHER INFORMATION CONTACT: Kuri DeLuna, Aviation Safety Engineer,
FAA, 1801 S Airport Road, Wichita, KS 67209; phone: 817-222-5350;
email: <a href="/cdn-cgi/l/email-protection#2b5c424843425f4a064844586b4d4a4a054c445d"><span class="__cf_email__" data-cfemail="2a5d434942435e4b074945596a4c4b4b044d455c">[email protected]</span></a>.
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 the ADDRESSES section. Include ``Docket No. FAA-2025-0334;
Project Identifier AD-2024-00108-T'' 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 this 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
<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 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 Kuri
DeLuna, Aviation Safety Engineer, FAA, 1801 S Airport Road, Wichita, KS
67209; phone: 817-222-5350; email: <a href="/cdn-cgi/l/email-protection#24534d474c4d504509474b57644245450a434b52"><span class="__cf_email__" data-cfemail="b7c0ded4dfdec3d69ad4d8c4f7d1d6d699d0d8c1">[email protected]</span></a>. Any commentary
that the FAA receives that is not specifically designated as CBI will
be placed in the public docket for this rulemaking.
Background
The FAA has received reports indicating mis-wired fire
extinguishing bottles, which could be due to the lack of design
features that would inherently preclude inadvertent mis-wiring during
installation and connection of subject fire extinguisher bottles. This
condition, if not addressed, could result in fire extinguisher bottles
that might not activate in the event of an engine or APU fire and
consequently, an unextinguished fire in the engine nacelle or APU.
FAA's Determination
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.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Textron Aviation Citation Service Letter SL560-26-
02, Revision 1, dated July 31, 2024; and Textron Aviation Citation
Service Letter SL560XL-26-02, Revision 1, dated July 31, 2024. This
material specifies procedures for an engine fire extinguisher system
functional test, inspection of the fire extinguisher bottle cartridge
wire numbers and yellow ID sleeves for proper identification and
legibility and applicable corrective actions. Corrective actions
include installing new yellow ID sleeves and new ring terminals. These
documents are distinct since they apply to different airplane models.
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.
Proposed AD Requirements in This NPRM
This proposed AD would require revising the existing inspection
program to incorporate new airworthiness limitations for repetitive
inspections of the engine fire extinguisher wiring and, as applicable,
APU fire extinguisher wiring. This proposed AD would also require
accomplishing the actions specified in the material already described
except for any differences identified as exceptions in the regulatory
text of this proposed AD.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 1,245 airplanes of U.S. registry. The FAA estimates the
following costs to comply with this proposed AD:
Estimated Costs
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Action Labor cost Parts cost Cost per product Cost on U.S. operators
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Inspection................... Up to 2 work- $0 Up to $170............. $211,650.
hours x $85 per
hour = $170.
Test......................... Up to 2 work- 0 Up to $170............. Up to $211,650.
hours x $85 per
hour = $170.
Revise existing inspection 1 work-hours x 0 $85.................... $105,825.
program. $85 per hour =
$85.
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The FAA estimates the following costs to do any necessary
corrective actions that would be required based on the results of the
proposed inspection. The agency has no way of determining the number of
aircraft that might need these corrective actions:
[[Page 11497]]
On-Condition Costs
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Action Labor cost Parts cost Cost per product
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Corrective actions.......................... 1 work-hour x $85 per hour = $40 $125
$85.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this proposed 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 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 this 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(f), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
Textron Aviation, Inc. (Type Certificate Previously Held by Cessna
Aircraft Company): Docket No. FAA-2025-0334; Project Identifier AD-
2024-00108-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by April 21, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Textron Aviation, Inc. (Type Certificate
previously held by Cessna Aircraft Company) airplanes, certificated
in any category, specified in paragraphs (c)(1) and (2) of this AD.
(1) Model 560 airplanes, having serial numbers (S/Ns) 560-0001
through 560-0707 inclusive, and 560-0751 through 560-0815 inclusive.
(2) Model 560XL airplanes, having S/Ns 560-5001 through 560-5372
inclusive, 560-5501 through 560-5677 inclusive, 560-5679 through
560-5830 inclusive, 560-6001 through 560-6294 inclusive, and 560-
6296 through 560-6360 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 26; Fire
Protection.
(e) Unsafe Condition
This AD was prompted by reports of mis-wired fire extinguishing
bottles. The FAA is issuing this AD to address mis-wired fire
extinguishing bottles, which might not activate in the event of an
engine or auxiliary power unit (APU) fire. The unsafe condition, if
not addressed, could result in an unextinguished fire in the engine
nacelle or APU.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Fire Bottle Wire Test and Inspection
For all airplanes except for serial numbers 560-6307 through
560-6360 inclusive; Within 100 flight hours or 60 days after the
effective date of this AD, whichever occurs first, do the actions
specified in paragraph (g)(1) and (2) of this AD.
(1) Perform an engine fire extinguisher system functional test
in accordance with step 4. of the Accomplishment Instructions of
Textron Aviation Citation Service Letter SL560-26-02, Revision 1,
dated July 31, 2024, or Textron Aviation Citation Service Letter
SL560XL-26-02, Revision 1, dated July 31, 2024, as applicable.
(2) Perform an inspection of the fire extinguisher bottle
cartridge wire numbers and yellow ID sleeves for proper
identification and legibility in accordance with step 6. of the
Accomplishment Instructions of Textron Aviation Citation Service
Letter SL560-26-02, Revision 1, dated July 31, 2024; or Textron
Aviation Citation Service Letter SL560XL-26-02, Revision 1, dated
July 31, 2024; as applicable. If the proper identification is not
found or any yellow ID sleeve is not legible, within 100 flight
hours or 60 days after the effective date of this AD, whichever
occurs first do all applicable corrective actions, in accordance
with step 6. of the Accomplishment Instructions of Textron Aviation
Citation Service Letter SL560-26-02, Revision 1, dated July 31,
2024; or Textron Aviation Citation Service Letter SL560XL-26-02,
Revision 1, dated July 31, 2024; as applicable.
(h) No Report
Although Textron Aviation Citation Service Letter SL560-26-02,
Revision 1, dated July 31, 2024; and Textron Aviation Citation
Service Letter SL560XL-26-02, Revision 1, dated July 31, 2024,
specify to report inspection findings, this AD does not require any
report.
(i) Inspection Program Revision
No later than 24 months after accomplishing paragraph (g) of
this AD, do the revision specified in paragraph (i)(1) or (2) of
this AD, as applicable.
(1) For Model 560 airplanes, revise the existing inspection
program to include the information identified in table 1 to
paragraph (i)(1) of this AD. The initial compliance time for the
task is at the later of the times specified in paragraphs (i)(1)(i)
and (ii) of this AD.
(i) Within 100 flight hours or 60 days after the effective date
of this AD, whichever occurs first.
(ii) Within 24 months after accomplishing paragraph (g) of this
AD.
[[Page 11498]]
Table 1 to Paragraph (i)(1)--New Model 560 Airworthiness Limitation Task
----------------------------------------------------------------------------------------------------------------
Maintenance
Task No. Task description Task interval manual
chapter
----------------------------------------------------------------------------------------------------------------
26-21-00-220............................ Fire Extinguisher Wiring 24 months.................. 4-10-00
Detailed Inspection.
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(2) For Model 560XL airplanes, revise the existing inspection
program to include the information identified in table 2 to
paragraph (i)(2) of this AD. The initial compliance time for the
tasks is at the later of the times specified in paragraphs (i)(2)(i)
and (ii) of this AD.
(i) Within 100 flight hours or 60 days after the effective date
of this AD, whichever occurs first.
(ii) Within 24 months after accomplishing paragraph (g) of this
AD.
Table 2 to Paragraph (i)(2)--New Model 560XL Airworthiness Limitations Tasks
----------------------------------------------------------------------------------------------------------------
Maintenance
Task No. Task description Task interval manual
chapter
----------------------------------------------------------------------------------------------------------------
26-21-00-2200........................... Engine Fire Extinguisher 24 months.................. 4-10-01
Wiring Detailed Inspection.
26-23-00-2200........................... Auxiliary Power Unit Fire 24 months.................. 4-10-01
Extinguisher Wiring
Detailed Inspection.
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(j) No Alternative Actions or Intervals
After the existing inspection program has been revised as
required by paragraph (i) of this AD, no alternative actions (e.g.,
inspections) or intervals, may be used unless the actions and
intervals are approved as an alternative method of compliance (AMOC)
in accordance with the procedures specified in paragraph (k) of this
AD.
(k) 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 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 (l) of this AD. Information may
be emailed to: <a href="/cdn-cgi/l/email-protection#cf8e82808c8fa9aeaee1a8a0b9"><span class="__cf_email__" data-cfemail="febfb3b1bdbe989f9fd0999188">[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.
(l) Related Information
For more information about this AD, contact Kuri DeLuna,
Aviation Safety Engineer, FAA, 1801 S Airport Road, Wichita, KS
67209; phone: 817-222-5350; email: <a href="/cdn-cgi/l/email-protection#84f3ede7ecedf0e5a9e7ebf7c4e2e5e5aae3ebf2"><span class="__cf_email__" data-cfemail="04736d676c6d706529676b77446265652a636b72">[email protected]</span></a>.
(m) 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) Textron Aviation Citation Service Letter SL560-26-02,
Revision 1, dated July 31, 2024.
(ii) Textron Aviation Citation Service Letter SL560XL-26-02,
Revision 1, dated July 31, 2024.
(3) For Textron Aviation material identified in this AD, contact
Textron Aviation, Inc., P.O. Box 7706, Wichita, KS 67277; telephone
316-517-6215; fax 316-517-5802; email <a href="/cdn-cgi/l/email-protection#ea89839e8b9e8385849a9f8899aa9e929e8b9cc4898587"><span class="__cf_email__" data-cfemail="6d0e04190c190402031d180f1e2d1915190c1b430e0200">[email protected]</span></a>;
website <a href="http://support.cessna.com/custsupt/csupport/newlogin.jsp">support.cessna.com/custsupt/csupport/newlogin.jsp</a>.
(4) 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.
(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 <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#adcbdf83c4c3deddc8ced9c4c2c3edc3ccdfcc83cac2db"><span class="__cf_email__" data-cfemail="274155094e4954574244534e4849674946554609404851">[email protected]</span></a>.
Issued on February 26, 2025.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2025-03403 Filed 3-6-25; 8:45 am]
BILLING CODE 4910-13-P
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