Airworthiness Directives; Textron Aviation, Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes

[Federal Register Volume 90, Number 108 (Friday, June 6, 2025)]
[Rules and Regulations]
[Pages 24057-24060]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-10320]


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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; 
Amendment 39-23055; AD 2025-11-09]
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.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Textron Aviation, Inc., Model 560 and 560XL airplanes. This AD 
was prompted by reports of mis-wired fire extinguishing bottles. This 
AD requires 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 AD also requires 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 issuing this AD to address the unsafe condition on 
these products.

DATES: This AD is effective July 11, 2025.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of July 11, 
2025.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket 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 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 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 [email protected]; 
website support.cessna.com/custsupt/csupport/newlogin.jsp.
    <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 regulations.gov under 
Docket No. FAA-2025-0334.

FOR FURTHER INFORMATION CONTACT: Kuri DeLuna, Aviation Safety Engineer, 
FAA, 1801 S Airport Road, Wichita, KS 67209; phone: 817-222-5350; 
email: [email protected].

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 Textron 
Aviation, Inc., Model 560 and 560XL airplanes. The NPRM was published 
in the Federal Register on March 7, 2025 (90 FR 11495). The NPRM was 
prompted by reports of mis-wired fire extinguishing bottles. In the 
NPRM, the FAA proposed to 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. In the NPRM, the FAA 
also proposed to 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. The FAA is issuing this AD to address mis-wired 
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.

Discussion of Final Airworthiness Directive

Comments

    The FAA received a comment from an individual that did not contain 
a specific suggestion or request that the FAA can act on.

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, this 
AD is adopted as proposed in the NPRM. None of the changes will 
increase the economic burden on any operator.

[[Page 24058]]

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.

Costs of Compliance

    The FAA estimates that this AD affects 1,245 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
----------------------------------------------------------------------------------------------------------------
Inspection.....................  Up to 2 work-hours x                 $0  Up to $170........  Up to $211,650.
                                  $85 per hour = $170.
Test...........................  Up to 2 work-hours x                  0  Up to $170........  Up to $211,650.
                                  $85 per hour = $170.
Revise existing inspection       1 work-hours x $85 per                0  $85...............  $105,825.
 program.                         hour = $85.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
corrective actions that would be required based on the results of the 
inspection. The agency has no way of determining the number of aircraft 
that might need these corrective actions:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                   Action                                 Labor cost                Parts cost        product
----------------------------------------------------------------------------------------------------------------
Corrective actions.........................  1 work-hour x $85 per hour = $85...             $40            $125
----------------------------------------------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some or all 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 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,
    (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:

2025-11-09 Textron Aviation, Inc. (Type Certificate Previously Held 
by Cessna Aircraft Company): Amendment 39-23055; Docket No. FAA-
2025-0334; Project Identifier AD-2024-00108-T.

(a) Effective Date

    This airworthiness directive (AD) is effective July 11, 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, as 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-

[[Page 24059]]

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.

Table 1 to Paragraph (i)(1)--New Model 560 Airworthiness Limitation Task
------------------------------------------------------------------------
                              Task                          Maintenance
       Task No.           description     Task interval   manual chapter
------------------------------------------------------------------------
26-21-00-220..........  Fire             24 months......         4-10-00
                         Extinguisher
                         Wiring
                         Detailed
                         Inspection.
------------------------------------------------------------------------

    (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
------------------------------------------------------------------------
                              Task                          Maintenance
       Task No.           description     Task interval   manual chapter
------------------------------------------------------------------------
26-21-00-2200.........  Engine Fire      24 months......         4-10-01
                         Extinguisher
                         Wiring
                         Detailed
                         Inspection.
26-23-00-2200.........  Auxiliary Power  24 months......         4-10-01
                         Unit Fire
                         Extinguisher
                         Wiring
                         Detailed
                         Inspection.
------------------------------------------------------------------------

(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: [email protected].
    (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: [email protected].

(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 [email protected];

[[Page 24060]]

website support.cessna.com/custsupt/csupport/newlogin.jsp.
    (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 www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on May 29, 2025.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2025-10320 Filed 6-5-25; 8:45 am]
BILLING CODE 4910-13-P

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