FAA-2025-20482

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-2025-0909; Project Identifier MCAI-2023-00895-R; Amendment 39-23198; AD 2025-24-03] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2019-19-13, which applied to certain Airbus Helicopters Model EC225LP helicopters. AD 2019-19-13 required determining the total hours time-in-service (TIS) of the free wheel shafts of certain main rotor gearboxes (MGBs), replacing the MGB or right-hand side (RH) free wheel shaft, installing placard(s), and revising the rotorcraft flight manual (RFM) for the helicopter. Since the FAA issued AD 2019-19-13, an additional part-numbered MGB has been identified to have the same unsafe condition and the FAA determined that additional changes are necessary. This AD requires the actions of AD 2019-19-13 and expands the applicability by adding the additional part-numbered MGB, changes the requirement to determine the total hours TIS of a certain free wheel shaft, requires repetitive replacement of the MGB or the RH free wheel shaft, changes the requirements for who can replace parts, and expands the parts installation limitation conditions. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective December 26, 2025. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2025-0909; 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 ( printed page 52235) 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. FOR FURTHER INFORMATION CONTACT: Frank Huynh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (404) 983-2588; email: frank.huynh@faa.gov. SUPPLEMENTARY INFORMATION: Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2019-19-13, Amendment 39-19749 (84 FR 56109, October 21, 2019) (AD 2019-19-13). AD 2019-19-13 applied to Airbus Helicopters Model EC225LP helicopters, with a MGB part number (P/N) 332A325001.XX, 332A325002.XX, or 332A325003.XX, with a main reduction gear module (main module), and with a certain modification installed. The NPRM was published in the Federal Register on May 22, 2025 (90 FR 21871). The NPRM was prompted by European Union Aviation Safety Agency (EASA) AD 2023-0148, dated July 19, 2023 (EASA AD 2023-0148) (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 since a previous EASA AD was issued, it was determined that an additional part-numbered MGB is potentially affected by the same unsafe condition and expanded the affected parts by adding MGB P/N 332A32-5004-00 with main module P/N 332A32-5400-00 installed. In the NPRM, the FAA determined that repetitive replacement of …

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