# Airworthiness Directives; Agusta S.p.A. Model A109K2 and A109E Helicopters
> **Rule** · Final rule; request for comments. · Published 2000-10-02 · Effective 2000-10-17 · 65 FR 58647
## Document
- **Document number:** 00-25151
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A. Model A109K2 and A109E
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 58647
- **Publication date:** 2000-10-02
- **Effective date:** 2000-10-17
- **FAA docket:** Docket No. 2000-SW-21-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109K2 and A109E helicopters. This AD requires replacing a certain main transmission aft support fitting (aft support fitting) with an airworthy aft support fitting within specified time intervals and establishes a retirement life for certain aft support fittings. This AD is prompted by three failures of the engine to main gearbox drive shaft due to fatigue cracks on the aft support fittings. This condition, if not corrected, could result in excessive displacement of the main gearbox, failure of an engine to main gearbox drive shaft, loss of power to the main rotor, and a subsequent forced landing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/10/02/00-25151/airworthiness-directives-agusta-spa-model-a109k2-and-a109e-helicopters)
---
*AI Analytics · CC0 1.0*