# Airworthiness Directives; Hartzell Propeller Inc. Steel Hub Turbine Propellers
> **Rule** · Final rule; request for comments. · Published 2009-05-20 · Effective 2009-06-04 · 74 FR 23625
## Document
- **Document number:** E9-11518
- **Category:** airworthiness
- **Manufacturer:** Hartzell
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 74 FR 23625
- **Publication date:** 2009-05-20
- **Effective date:** 2009-06-04
- **FAA docket:** Docket No. FAA-2009-0114
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Hartzell Propeller Inc. steel hub turbine propellers, with any counterweight slug attachment bolts, part number (P/N) B-3386-14H, LFC manufacturing lot 224, installed. This AD requires identifying and removing all counterweight slug attachment bolts, P/N B-3386-14H, LFC manufacturing lot 224, from service and installing serviceable bolts. This AD results from two reports of failure of the bolts that attach the propeller blade counterweight slug, and separation of the counterweight slug which led to propeller vibration and damage to the propeller spinner. We are issuing this AD to prevent separation of the propeller blade counterweight slug, which could lead to injury and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/05/20/E9-11518/airworthiness-directives-hartzell-propeller-inc-steel-hub-turbine-propellers)
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