# Airworthiness Directives; Dowty Aerospace Propellers Model R381/ 6-123-F/5 Propellers
> **Rule** · Final rule; request for comments. · Published 1999-09-01 · Effective 1999-09-16 · 64 FR 47661
## Document
- **Document number:** 99-22563
- **Category:** airworthiness
- **Manufacturer:** Dowty Aerospace
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 47661
- **Publication date:** 1999-09-01
- **Effective date:** 1999-09-16
- **FAA docket:** Docket No. 99-NE-43-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Dowty Aerospace Propellers Model R381/6-123-F/5 propellers. This action requires initial and repetitive visual and ultrasonic (UT) inspections of propeller blades for cracks across the camber face, and, if blades are found cracked, replacement with serviceable blades. This amendment is prompted by reports of a cracked composite propeller blade. The actions specified in this AD are intended to prevent propeller blade cracks and propagation, which could result in propeller blade separation and possible aircraft loss of control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/09/01/99-22563/airworthiness-directives-dowty-aerospace-propellers-model-r381-6-123-f5-propellers)
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