AD 2025-11-09 ACTIVE

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.

Final rule.

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 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- 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 No. Task description Task interval Maintenance manual chapter 26-21-00-220 Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-00 (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 No. Task description Task interval Maintenance manual chapter 26-21-00-2200 Engine Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-01 26-23-00-2200 Auxiliary Power Unit Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-01 (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: AMOC@faa.gov. (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: wichita-cos@faa.gov. (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 citationpubs@txtav.com; 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 fr.inspection@nara.gov. 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

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. 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 Action Labor cost Parts cost Cost per product Cost on U.S. operators Inspection Up to 2 work-hours × $85 per hour = $170 $0 Up to $170 Up to $211,650. Test Up to 2 work-hours × $85 per hour = $170 0 Up to $170 Up to $211,650. Revise existing inspection program 1 work-hours × $85 per hour = $85 0 $85 $105,825. 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 Action Labor cost Parts cost Cost per product Corrective actions 1 work-hour × $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 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 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- 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 No. Task description Task interval Maintenance manual chapter 26-21-00-220 Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-00 (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 No. Task description Task interval Maintenance manual chapter 26-21-00-2200 Engine Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-01 26-23-00-2200 Auxiliary Power Unit Fire Extinguisher Wiring Detailed Inspection 24 months 4-10-01 (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: AMOC@faa.gov. (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: wichita-cos@faa.gov. (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 citationpubs@txtav.com; 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 fr.inspection@nara.gov. Issued on May 29, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service.

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: - 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 citationpubs@txtav.com ; website support.cessna.com/custsupt/csupport/newlogin.jsp . - 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.

Kuri DeLuna, Aviation Safety Engineer, FAA, 1801 S Airport Road, Wichita, KS 67209; phone: 817-222-5350; email: wichita-cos@faa.gov .