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2006-07-20: Software version of the digital electronic control

FAA order 2006-07-20 is an airworthiness directive in force since May 5, 2006. The FAA's subject line: Software version of the digital electronic control. It names the Turbomeca (Safran) MAKILA 1A1 engine: about 8 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product
Engine
Makes
Turbomeca S.A.
Models
Makila 1A2
Engine series
Turbomeca (Safran) MAKILA 1A1 8 aircraft

Dates and paperwork

In force since
May 5, 2006
Published
April 5, 2006 (signed March 30, 2006)
Docket
FAA-2006-24239
Status
Current
The FAA's document
Read the order on the FAA's site

The FAA's summary their words, unchanged

The FAA is adopting a new airworthiness directive (AD) for Turbomeca Makila 1 A2 turboshaft engines. This AD requires upgrading the software version of the digital electronic control. This AD results from Turbomeca determining that Makila 1 A2 turboshaft engines with software version 9 installed in the digital electronic control unit (DECU), under certain conditions, could experience a free turbine overspeed and uncontained failure. We are issuing this AD to prevent overspeed and uncontained failure of the free turbine and damage to the helicopter.

The order itself the regulatory text, as published

Show the full text (1,707 characters)
2006-07-20 Turbomeca: Amendment 39-14547. Docket No. FAA-2006-24239; Directorate Identifier 2006-NE-09-AD. Effective Date (a) This airworthiness directive (AD) becomes effective May 5, 2006. Affected ADs (b) None. Applicability (c) This AD applies to Turbomeca Makila 1 A2 turboshaft engines. These engines are installed on, but not limited to, Eurocopter AS 332 L2 helicopters. Unsafe Condition (d) This AD results from Turbomeca determining that Makila 1 A2 turboshaft engines with software version 9 installed in the digital electronic control unit (DECU), under certain conditions, could experience a free turbine overspeed and uncontained failure. We are issuing this AD to prevent overspeed and uncontained failure of the free turbine and damage to the helicopter. Compliance (e) You are responsible for having the actions required by this AD performed no later than November 30, 2008, unless the actions have already been done. (f) Upgrade the software version in the DECU from version 9 (TU 230C) to version 11 (TU 244C). Information on this upgrade can be found in Turbomeca Mandatory Service Bulletin No. 298 73 0244, dated February 2, 2006. (g) Version 11 (TU 244C) software must not be intermixed on the helicopter with any other DECU software version except version 9 (TU 230C). Alternative Methods of Compliance (h) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (i) Direction Generale De L'Aviation Civile airworthiness directive F-2006-029, dated February 1, 2006, also addresses the subject of this AD.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 12, 2026. Connections as data: /graph/directive/2006-07-20.json · aircraft systems.