# Airworthiness Directives; Turbomeca Makila 1 A, 1 A1, and 1 A2 Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2002-08-01 · Effective 2002-08-16 · 67 FR 49859
## Document
- **Document number:** 02-19164
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 67 FR 49859
- **Publication date:** 2002-08-01
- **Effective date:** 2002-08-16
- **FAA docket:** Docket No. 2001-NE-23-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Turbomeca Makila 1 A, 1 A1, and 1 A2 turboshaft engines. This action requires replacing certain digital electronic control units (DECU's) and electronic control units (ECU's) with modified DECU's and ECU's. This amendment is prompted by a report of an uncontained engine turbine wheel failure and the subsequent loss of control of the helicopter. The actions specified in this AD are intended to prevent an engine overspeed condition resulting from the failure of two or more NTL channels.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/08/01/02-19164/airworthiness-directives-turbomeca-makila-1-a-1-a1-and-1-a2-turboshaft-engines)
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