2023-19932

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-2023-1398; Project Identifier AD-2023-00472-P; Amendment 39-22525; AD 2023-16-06] • RIN 2120-AA64 ( printed page 63513) AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all Hamilton Sundstrand Corporation (Hamilton Sundstrand) Model 14SF-17 and 14SF-19 propellers. This AD was prompted by a report of an auxiliary motor and pump failing to feather a propeller in flight. This AD requires replacement of a certain auxiliary motor and pump. This AD also prohibits installation of a certain auxiliary motor and pump on any propeller. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective October 20, 2023. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 20, 2023. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2023-1398; 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. Material Incorporated by Reference: • For service information identified in this final rule, contact Hamilton Sundstrand, One Hamilton Road, Windsor Locks, CT 06096; phone: (877) 808-7575; email:CRC@collins.com. • You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222-5110. It is also available atregulations.gov under Docket No. FAA-2023-1398. FOR FURTHER INFORMATION CONTACT: Isabel Saltzman, Aviation Safety Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; phone: (781) 238-7649; 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 all Hamilton Sundstrand Model 14SF-17 and 14SF-19 propellers. The NPRM published in the Federal Register on June 27, 2023 (88 FR 41513). The NPRM was prompted by a report of an auxiliary motor and pump installed on a non-Hamilton Sundstrand propeller failing to feather the propeller in flight through either the primary or the backup means. The failure was caused by motor magnets in the auxiliary motor and pump that were de-bonded due to corrosion at the magnet and housing interface. The de-bonded motor magnets prevented motor rotation. Hamilton Sundstrand Model 14SF-17 and 14SF-19 propellers use the same auxiliary motor and pump. These propellers are installed on, but not limited to, Viking Air Limited (type certificate previously held by Bombardier Inc.; Canadair Limited) Model …

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