# Proposed AD FAA-2013-0056: Hamilton Sundstrand Corporation Propellers

- Type: Proposed airworthiness directive (not in force)
- Status: Withdrawn
- Action: Proposed rule; withdrawal.
- Published: July 22, 2013, 78 FR 43838
- Comments due: July 21, 2013
- Docket: FAA-2013-0056 (https://www.regulations.gov/docket/FAA-2013-0056, where comments are filed)
- Project: 2012-NE-48-AD
- FR document: 2013-17479
- Official PDF: https://openairdocs.org/files/sha256/b0/13/b013a3588b9338db55ee5fedbcfe8b45c6a69c38a56438646d4dc98e6ec7b158 (from https://www.govinfo.gov/content/pkg/FR-2013-07-22/pdf/2013-17479.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/07/22/2013-17479/airworthiness-directives-hamilton-sundstrand-corporation-propellers
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88E78238856DC46C86257BB000508B7B.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0056

## Summary

The FAA is withdrawing a notice of proposed rulemaking (NPRM). The NPRM proposed a new airworthiness directive (AD) that had applied to certain Hamilton Sundstrand Corporation 14SF-7, 14SF-15, and 14SF-23 series propellers. The NPRM had applied to those propellers using certain Hamilton Sundstrand Corporation auxiliary pumps and motors (auxiliary feathering pumps). The proposed action would have required removal of certain serial numbers (S/Ns) of auxiliary feathering pumps from service. Since we issued the NPRM, we attended a meeting sponsored by Hamilton Sundstrand Corporation, which provided additional information regarding the unsafe condition. The information included results from bond strength tests that predicts a significantly lower fleet risk than the prior qualitative analysis. Accordingly, we withdraw the proposed rule.

## Notices in this docket

- Feb 7, 2013: Notice of proposed rulemaking (NPRM), DOT. (first notice), FR document 2013-02719, comments due Mar 25, 2013 (https://www.federalregister.gov/documents/2013/02/07/2013-02719/airworthiness-directives-hamilton-sundstrand-corporation-propellers)
- Jul 22, 2013: Proposed rule; withdrawal., FR document 2013-17479, comments due Jul 21, 2013 (https://www.federalregister.gov/documents/2013/07/22/2013-17479/airworthiness-directives-hamilton-sundstrand-corporation-propellers)

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