# Airworthiness Directives; Hamilton Sundstrand Propellers Model 247F Propellers
> **Rule** · Final rule. · Published 2011-02-09 · Effective 2011-03-16 · 76 FR 7101
## Document
- **Document number:** 2011-2758
- **Category:** airworthiness
- **Manufacturer:** Hamilton Sundstrand
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 76 FR 7101
- **Publication date:** 2011-02-09
- **Effective date:** 2011-03-16
- **FAA docket:** Docket No. FAA-2009-0113
## Abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires removing affected propeller blades from service. This AD was prompted by reports of blades with corrosion pits in the tulip area of the blades. We are issuing this AD to prevent cracks from developing in the tulip area of the blade, which could result in separation of the blade and possible loss of airplane control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/02/09/2011-2758/airworthiness-directives-hamilton-sundstrand-propellers-model-247f-propellers)
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