# Proposed AD FAA-2023-1398: Hamilton Sundstrand Corporation Propellers

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-16-06
- Products: Hamilton Sundstrand
- Product type: Propeller
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 27, 2023, 88 FR 41513
- Comments due: July 27, 2023
- Became: [AD 2023-16-06](https://openairdocs.org/ad/2023-16-06)
- Docket: FAA-2023-1398 (https://www.regulations.gov/docket/FAA-2023-1398, where comments are filed)
- Project: AD-2023-00472-P
- FR document: 2023-13582
- Official PDF: https://openairdocs.org/files/sha256/99/23/99235d30598193cd98a930ae6551e58817c3222dbc00236e3760ddecd5f2c752 (from https://www.govinfo.gov/content/pkg/FR-2023-06-27/pdf/2023-13582.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/06/27/2023-13582/airworthiness-directives-hamilton-sundstrand-corporation-propellers
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-13582-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-1398

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Hamilton Sundstrand Corporation (Hamilton Sundstrand) Model 14SF-17 and 14SF-19 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

- Jun 27, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-13582, comments due Jul 27, 2023 (https://www.federalregister.gov/documents/2023/06/27/2023-13582/airworthiness-directives-hamilton-sundstrand-corporation-propellers)

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