FAA

FAA-2025-12563

Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

Autoridade

Federal Aviation Administration (EUA)

Data de Publicação

07 de julho de 2025

Data Efetiva

Não informada

Prazo de Cumprimento

Antes do próximo voo

Resumo da Diretiva

PT-BRTradução automática

A FAA propõe adotar uma nova diretiva de aeronavegabilidade (DA) para certos aviões ATR--GIE Avions de Transport Régional, modelos ATR42-500 e ATR72. Esta DA proposta foi motivada por uma investigação indicando que um monitoramento errôneo da unidade de limitação de curso (TLU) poderia ocorrer quando o avião está voando acima de uma determinada velocidade como resultado da entrada de lógica de um ou ambos os computadores de dados aerodinâmicos (ADC) 1 ou ADC 2. Esta DA proposta exigiria a modificação dos aviões através da instalação de um ou dois relés e fiação associada, além de testes da lógica de monitoramento da TLU. A FAA está propondo esta DA para abordar a condição insegura nestes produtos.

ENOriginal (Federal Register)

The FAA proposes to adopt a new airworthiness directive (AD) for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42- 500 and ATR72 airplanes. This proposed 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 proposed AD would require modifying airplanes by installing one or two relays and associated wiring, and testing of the TLU monitoring logic. The FAA is proposing 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] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain ATR—GIE Avions de Transport Régional Model ATR42-500 and ATR72 airplanes. This proposed 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 proposed AD would require modifying airplanes by installing one or two relays and associated wiring, and testing of the TLU monitoring logic. 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 August 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: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: 202-493-2251. • 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. • 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 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 NPRM, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For European Union Aviation Safety Agency (EASA) material identified in this proposed 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. It is also available at regulations.gov under Docket No. FAA-2025-1354. • 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: 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: Comments Invited …

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