2026-02415

Document Headings Document headings vary by document type but may contain the following: • the agency or agencies that issued and signed a document • the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to • the agency docket number / agency internal file number • the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. 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 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all Textron Aviation, Inc., Model 525B airplanes. This AD was prompted by the manufacturer's revision of the aircraft maintenance manual (AMM) to introduce more restrictive inspection intervals. This AD requires revising the Airworthiness Limitations Section (ALS) of the existing AMM or instructions for continued airworthiness (ICA) and the existing approved maintenance or inspection program, as applicable. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective March 13, 2026. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov 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. FOR FURTHER INFORMATION CONTACT: Soban Saeed, Aviation Safety Engineer, FAA, 1801 South Airport Road, Wichita, KS 67209; phone: (316) 946-4123; email: CCB-COS@faa.gov. 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 all Textron Aviation, Inc., Model 525B airplanes. The NPRM was published in the Federal Register on November 28, 2025 (90 FR 54599). The NPRM was prompted by notification to the FAA by Textron Aviation that the existing Model 525B AMM contained incorrect inspection intervals for airworthiness limitation tasks for Chapter 54—Nacelle/Pylons and Chapter 55—Stabilizers. The incorrect inspection intervals were introduced during a technical manual update. In the NPRM, the FAA proposed to require revising the ALS of the existing AMM or ICA and the existing approved maintenance or inspection program, as applicable. 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 ( printed page 5284) consequent reduced controllability of the airplane. Discussion of Final Airworthiness Directive Comments The FAA received a comment from Capital City Jet Center. The commenter had no objection to the NPRM. 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 conditions on these products. Except for minor editorial corrections, this AD is adopted as proposed in the NPRM. Costs of Compliance The FAA estimates that this AD affects 601 airplanes of U.S. registry. The F…

Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.