# Airworthiness Directives; Agusta A109C Helicopters
> **Rule** · Final rule; request for comments. · Published 1998-11-24 · Effective 1998-12-09 · 63 FR 64856
## Document
- **Document number:** 98-31331
- **Category:** airworthiness
- **Manufacturer:** Agusta A109C
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 64856
- **Publication date:** 1998-11-24
- **Effective date:** 1998-12-09
- **FAA docket:** Docket No. 98-SW-14-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Agusta A109C helicopters. This action requires, within the next 5 hours time-in-service (TIS), replacing the tail rotor blade grip assemblies (grip assemblies) with modified airworthy grip assemblies. This amendment is prompted by cracks that were found on the grip assemblies during maintenance inspections. This condition, if not corrected, could result in separation of a tail rotor blade and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/11/24/98-31331/airworthiness-directives-agusta-a109c-helicopters)
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