# Airworthiness Directives; Mitsubishi Model YS-11 Airplanes, and Model YS-11A-200, YS-11A-300, YS-11A-500, and YS-11A-600 Series Airplanes
> **Rule** · Final rule. · Published 2005-11-01 · Effective 2005-12-06 · 70 FR 65827
## Document
- **Document number:** 05-21543
- **Category:** airworthiness
- **Manufacturer:** Mitsubishi Model YS-11
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 65827
- **Publication date:** 2005-11-01
- **Effective date:** 2005-12-06
- **FAA docket:** Docket No. 98-NM-300-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Mitsubishi Model YS-11 airplanes, and Model YS- 11A-200, YS-11A-300, YS-11A-500, and YS-11A-600 series airplanes. This AD requires repetitive removal of the spinner; repetitive detailed inspections of the propeller hub to detect fatigue cracking; and replacement of a propeller hub with a new propeller hub, if necessary. This action is necessary to detect and correct fatigue cracking of the propeller hub, which could cause the loss of the propeller. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/11/01/05-21543/airworthiness-directives-mitsubishi-model-ys-11-airplanes-and-model-ys-11a-200-ys-11a-300-ys-11a-500)
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