# Airworthiness Directives; Agusta S.p.A. Model A109C and A109K2 Helicopters
> **Rule** · Final rule; request for comments. · Published 1998-06-26 · Effective 1998-07-13 · 63 FR 34798
## Document
- **Document number:** 98-16612
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A. Model A109C and A109K2
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 34798
- **Publication date:** 1998-06-26
- **Effective date:** 1998-07-13
- **FAA docket:** Docket No. 97-SW-65-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Agusta S.p.A. (Agusta) Model A109C and A109K2 helicopters. This action requires a one-time inspection of each tail rotor blade (blade) for debonding, and if debonding exists which exceeds certain limits, replacement of the blade with an airworthy blade. This amendment is prompted by two incidents in which helicopters lost a blade tip fairing during ground run-up. The actions specified in this AD are intended to prevent loss of the tip fairing on a blade, which could result in increased vibrations, loss of the tail rotor assembly, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/06/26/98-16612/airworthiness-directives-agusta-spa-model-a109c-and-a109k2-helicopters)
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