FAA-2026-07720
Airworthiness Directives; Various Helicopters
Resumo Rápido
- Número AD
- FAA-2026-07720
- Autoridade
- FAA
- Data de emissão
- 21/04/2026
- Data efetiva
- —
- Criticidade
- routine
Autoridade
Federal Aviation Administration (EUA)
Data de Publicação
21 de abril de 2026
Data Efetiva
Não informada
Prazo de Cumprimento
Antes do próximo voo
Resumo da Diretiva
A FAA propõe superseder a Diretriz de Aeronavegabilidade (AD) 2015-20-12, que se aplica a certos helicópteros Sikorsky Aircraft Corporation modelo S-61A, D, E, L, N, NM número de série (S/N) 61454, R e V; Croman Corporation modelo SH-3H; Carson Helicopters, Inc., modelo S-61L e SH-3H; Glacier Helicopter, Inc., modelo CH-3E; Robinson Air Crane, Inc., modelo CH-3E, CH-3C, HH-3C e HH-3E; e Siller Helicopters modelo CH-3E e SH-3A. A AD 2015-20-12 exige o cálculo ou recálculo das horas de tempo em serviço (TIS) do eixo do rotor principal (MRS), determinação se o MRS é levantamento externo repetitivo (REL) ou não-REL, execução de inspeção não destrutiva (NDI) para trincas, substituição de qualquer MRS que apresente trincas, substituição de componentes antes de seus limites de vida útil e retirada de serviço de qualquer componente que tenha excedido seus limites de vida útil. Esta AD proposta também exigiria o estabelecimento de vidas de aposentadoria para cada MRS REL, incluindo redução dos limites de vida útil e permissão de modificação dos limites de vida útil com base em informações de serviço, e remoção de qualquer MRS com furos de pino de encaixe aumentados. Desde que a FAA emitiu a AD 2015-20-12, uma reavaliação de projeto mostra que o MRS em certos modelos de helicópteros requer um limite de vida útil inferior. Esta AD proposta manteria alguns dos requisitos da AD 2015-20-12 e também reduziria a vida de aposentadoria de um certo MRS instalado em certos helicópteros e atualizaria o nome do titular do certificado de tipo para alguns dos modelos de helicópteros afetados. A FAA propõe esta AD para resolver a condição insegura nesses produtos.
The FAA proposes to supersede Airworthiness Directive (AD) 2015-20-12, which applies to certain Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM serial number (S/N) 61454, R, and V; Croman Corporation Model SH-3H; Carson Helicopters, Inc., Model S-61L and SH- 3H; Glacier Helicopter, Inc., Model CH-3E; Robinson Air Crane, Inc., Model CH-3E, CH-3C, HH-3C and HH-3E; and Siller Helicopters Model CH-3E and SH-3A helicopters. AD 2015-20-12 requires calculating or recalculating the hours time-in-service (TIS) of the main rotor shaft (MRS), determining whether the MRS is repetitive external lift (REL) or non-REL, performing a nondestructive inspection (NDI) for cracks, replacing any MRS that has cracks, replacing parts before their life limits and removing from service any parts that have exceeded their life limits. This proposed AD would also require establishing retirement lives for each REL MRS, including reducing life limits and allowing for modification of life limits based on service information, and removing any MRS with oversized dowel pin bores. Since the FAA issued AD 2015-20-12, a design re-evaluation shows that the MRS on certain helicopter models requires a lower life limit. This proposed AD would retain some of the requirements of AD 2015-20-12, and would also lower the retirement life for a certain MRS installed on certain helicopters and would update the type certificate holder name for some of the affected helicopter models. The FAA is proposing this AD to address the unsafe condition on these products.Texto Completo da Diretiva
Expandir texto completo (Federal Register)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-2026-3488; Project Identifier AD-2024-00583-R] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 2015-20-12, which applies to certain Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM serial number (S/N) 61454, R, and V; Croman Corporation Model SH-3H; Carson Helicopters, Inc., Model S-61L and SH-3H; Glacier Helicopter, Inc., Model CH-3E; Robinson Air Crane, Inc., Model CH-3E, CH-3C, HH-3C and HH-3E; and Siller Helicopters Model CH-3E and SH-3A helicopters. AD 2015-20-12 requires calculating or recalculating the hours time-in-service (TIS) of the main rotor shaft (MRS), determining whether the MRS is repetitive external lift (REL) or non-REL, performing a nondestructive inspection (NDI) for cracks, replacing any MRS that has cracks, replacing parts before their life limits and removing from service any parts that have exceeded their life limits. This proposed AD would also require establishing retirement lives for each REL MRS, including reducing life limits and allowing for modification of life limits based on service information, and removing any MRS with oversized dowel pin bores. Since the FAA issued AD 2015-20-12, a design re-evaluation shows that the MRS on certain helicopter models requires a lower life limit. This proposed AD would retain some of the requirements of AD 2015-20-12, and would also lower the retirement life for a certain MRS installed on certain helicopters and would update the type certificate holder name for some of the affected helicopter models. The FAA is proposing this AD ( printed page 21270) to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by June 5, 2026. 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-2026-3488; 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, any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For Sikorsky material identified in this proposed AD, contact a Sikorsky Field Representative or Sikorsky's Service Engineering Group at Sikorsky Aircraft Corporation, Mailstop K100, 124 Quarry Road, Trumbull, CT 06611; telephone 1-800-946-4337 (1-800-Win…
Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.
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