Airworthiness directives › 2006-07-20
AD 2006-07-20 Airworthiness Directives; Turbomeca Makila 1 A2 Turboshaft Engines
Applicability*9
This AD applies to Turbomeca Makila 1 A2 turboshaft engines. These engines are installed on, but not limited to, Eurocopter AS 332 L2 helicopters.
Compliance
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
Unsafe condition
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.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1