# Airworthiness Directives; Robinson Helicopter Company (RHC) Model R44 Helicopters
> **Rule** · Final rule; request for comments. · Published 1998-11-10 · Effective 1998-11-10 · 63 FR 62931
## Document
- **Document number:** 98-30046
- **Category:** airworthiness
- **Manufacturer:** Robinson Helicopter Company (RHC) Model R44
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 62931
- **Publication date:** 1998-11-10
- **Effective date:** 1998-11-10
- **FAA docket:** Docket No. 98-SW-56-AD
## Abstract

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-22-16 which was sent previously to all known U.S. owners and operators of RHC Model R44 helicopters by individual letters. This amendment supersedes AD 98-12- 19, issued August 5, 1998, applicable to RHC Model R44 helicopters, that currently requires main rotor blade inspections and replacement if a crack is found. This amendment requires the same inspections as AD 98-12-19, but mandates replacement of all the affected main rotor blades prior to further flight after November 15, 1998. This amendment is prompted by an incident in which a crack was discovered in a main rotor blade. The actions specified by this AD are intended to prevent failure of a main rotor blade and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/11/10/98-30046/airworthiness-directives-robinson-helicopter-company-rhc-model-r44-helicopters)
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