# Airworthiness Directives; Dowty Propellers Constant Speed Propellers
> **Rule** · Final rule. · Published 2016-03-11 · Effective 2016-04-15 · 81 FR 12795
## Document
- **Document number:** 2016-05460
- **Category:** airworthiness
- **Manufacturer:** Dowty
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 12795
- **Publication date:** 2016-03-11
- **Effective date:** 2016-04-15
- **FAA docket:** Docket No. FAA-2015-3661
## Abstract

We are adopting a new airworthiness directive (AD) for certain Dowty Propellers R352/6-123-F/1, R352/6-123-F/2, and R410/6-123-F/35 model propellers. This AD was prompted by reports of dowel hole cracks in the face of the rear hub half. This AD requires installing dowel hole liners as necessary. We are issuing this AD to prevent loss of structural integrity of the propeller hub, which could result in damage to the propeller and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/03/11/2016-05460/airworthiness-directives-dowty-propellers-constant-speed-propellers)
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