# Proposed AD FAA-2023-1820: Hamilton Sundstrand Corporation Propellers

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-07-01
- Products: Hamilton Sundstrand
- Product type: Propeller
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 7, 2023, 88 FR 61480
- Comments due: October 23, 2023
- Became: [AD 2024-07-01](https://openairdocs.org/ad/2024-07-01)
- Docket: FAA-2023-1820 (https://www.regulations.gov/docket/FAA-2023-1820, where comments are filed)
- Project: AD-2023-00510-P
- FR document: 2023-19085
- Official PDF: https://openairdocs.org/files/sha256/f2/50/f250565173e9ef07fa97ef549cc9ef7265567c1b8c8ad97c1d3d1b7a7bf8fcb3 (from https://www.govinfo.gov/content/pkg/FR-2023-09-07/pdf/2023-19085.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/09/07/2023-19085/airworthiness-directives-hamilton-sundstrand-corporation-propellers
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-19085-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-1820

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Hamilton Sundstrand Corporation (Hamilton Sundstrand) Model 14SF-7, 14SF-15, and 14SF-23 propellers. This proposed AD was prompted by a report of an auxiliary motor and pump failing to feather a propeller in flight. This proposed AD would require replacement of a certain auxiliary motor and pump. This proposed AD would also prohibit installation of a certain auxiliary motor and pump on any propeller. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 7, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-19085, comments due Oct 23, 2023 (https://www.federalregister.gov/documents/2023/09/07/2023-19085/airworthiness-directives-hamilton-sundstrand-corporation-propellers)

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