FAA

FAA-2025-19393

Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

Autoridade

Federal Aviation Administration (EUA)

Data de Publicação

02 de outubro de 2025

Data Efetiva

06 de novembro de 2025

Prazo de Cumprimento

Antes do próximo voo

Resumo da Diretiva

PT-BRTradução automática

A FAA está adotando uma nova diretiva de aeronavegabilidade (DA) para certos aviões ATR--GIE Avions de Transport Régional modelo ATR42-500 e ATR72. Esta DA foi motivada por uma investigação indicando que um monitoramento errôneo da unidade limitadora de curso (TLU) poderia ocorrer quando o avião está voando acima de uma certa velocidade como resultado da entrada de lógica proveniente da entrada do computador de dados aerodinâmicos (ADC) 1 ou ADC2. Esta DA exige modificação dos aviões através da instalação de um ou dois relés e fiação associada e teste da lógica de monitoramento da TLU. A FAA está emitindo esta DA para abordar a condição insegura destes produtos.

ENOriginal (Federal Register)

The FAA is adopting a new airworthiness directive (AD) for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72 airplanes. This AD was prompted by an investigation indicating that an erroneous monitoring of the travel limitation unit (TLU) could occur when the airplane is flying above a certain speed as a result of the logic input from either air data computer (ADC) 1 or ADC2 input. This AD requires modifying airplanes by installing one or two relays and associated wiring and testing of the TLU monitoring logic. The FAA is issuing this AD to address the unsafe condition on these products.

Documentos e Referências

📄 PDF Original 🌐 Federal Register

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Texto Completo da Diretiva

Expandir texto completo (Federal Register)

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-2025-1354; Project Identifier MCAI-2025-00012-T; Amendment 39-23154; AD 2025-20-01] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain ATR—GIE Avions de Transport Régional Model ATR42-500 and ATR72 airplanes. This AD was prompted by an investigation indicating that an erroneous monitoring of the travel limitation unit (TLU) could occur when the airplane is flying above a certain speed as a result of the logic input from either air data computer (ADC) 1 or ADC2 input. This AD requires modifying airplanes by installing one or two relays and associated wiring and testing of the TLU monitoring logic. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective November 6, 2025. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of November 6, 2025. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2025-1354; 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, the mandatory continuing airworthiness information (MCAI), 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 European Union Aviation Safety Agency (EASA) material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; emailADs@easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. • 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 atregulations.gov under Docket No. FAA-2025-1354. FOR FURTHER INFORMATION CONTACT: Jonathan Duong, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7362; email: 9-AVS-AIR-BACO-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 certain ATR—GIE Avions de Transport Régional Model ATR42-500 and ATR72 airplanes. The NPRM was published in the Federal Register on July 7, 2025 (90 FR 29802). The NPRM was prompted by AD 2025-0004, dated January 7, 2025 (EASA AD 2025-0004) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union. The MCAI states that an ATR internal review of the TLU new avionics suite design identified an erroneous behavior of core processing module (CPM) 2, ho…

Fonte: Federal Register (federalregister.gov). Texto original em inglês.