# Airworthiness Directives; Hamilton Standard 14RF Series, 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers
> **Rule** · Final rule; request for comments. · Published 1995-03-08 · Effective 1995-03-23 · 60 FR 12663
## Document
- **Document number:** 95-5483
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 60 FR 12663
- **Publication date:** 1995-03-08
- **Effective date:** 1995-03-23
- **FAA docket:** Docket No. 95-ANE-02
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to Hamilton Standard 14RF series, 14SF series, and Hamilton Standard/British Aerospace 6/5500/F series propellers, that currently requires a one-time ultrasonic shear wave inspection for cracks in the propeller blade taper bore. This amendment requires initial and repetitive ultrasonic shear wave inspections, and a one- time visual and borescope inspection of the taper bore for corrosion as a terminating action to the ultrasonic shear wave inspections. This amendment is prompted by reports of two incidents where a portion of the propeller blade was lost in flight. The actions specified by this AD are intended to prevent loss of a propeller blade due to cracks initiating in the blade taper bore, that can result in possible aircraft damage, and possible loss of aircraft control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1995/03/08/95-5483/airworthiness-directives-hamilton-standard-14rf-series-14sf-series-and-hamilton-standardbritish)
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