# Airworthiness Directives; Agusta S.p.A. Model A109C, A109E, and A109K2 Helicopters
> **Rule** · Final rule; request for comments. · Published 1999-02-16 · Effective 1999-03-03 · 64 FR 7494
## Document
- **Document number:** 99-3589
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 7494
- **Publication date:** 1999-02-16
- **Effective date:** 1999-03-03
- **FAA docket:** Docket No. 98-SW-40-AD
## Abstract

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) AD 98-19-04, which was sent previously to all known U.S. owners and operators of Agusta S.p.A. Model A109C, A109E, and A109K2 helicopters by individual letters. This AD requires conducting a tapping inspection of the upperside and lowerside of the main rotor blade (blade) blade tip cap for debonding between the metal shells and honeycomb core; conducting a visual inspection of the upperside and lowerside of the blade tip cap for swelling or deformation between the metal shells and the honeycomb core; and visually inspecting the welded bead along the leading edge of the blade tip cap for cracks. This amendment is prompted by two discoveries of cracks in the leading edge of the blade tip cap of a blade. The actions specified by this AD are intended to prevent blade blade tip cap failure and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/02/16/99-3589/airworthiness-directives-agusta-spa-model-a109c-a109e-and-a109k2-helicopters)
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