# Airworthiness Directives; Agusta Model AB412 Helicopters
> **Rule** · Final rule; request for comments. · Published 2001-08-30 · Effective 2001-09-14 · 66 FR 45753
## Document
- **Document number:** 01-21748
- **Category:** airworthiness
- **Manufacturer:** Agusta Model AB412
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 45753
- **Publication date:** 2001-08-30
- **Effective date:** 2001-09-14
- **FAA docket:** Docket No. 2001-SW-22-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) for Agusta Model AB412 helicopters. This action prohibits use of the hoist until certain modifications are accomplished. This amendment is prompted by the loss of a hoist hook during flight due to an uncommanded firing of the cable cutter cartridge caused by wire chafing. The actions specified in this AD are intended to prevent wire chafing, inadvertent firing of the cable cutter cartridge, loss of a hoist hook and section of cable, impact with the main or tail rotor, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/08/30/01-21748/airworthiness-directives-agusta-model-ab412-helicopters)
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