Airworthiness directives › 2008-08-16
AD 2008-08-16 Airworthiness Directives; Turbomeca Makila 1A and 1A1 Turboshaft Engines
Applicability*9
This AD applies to Turbomeca Makila 1A and 1A1 turboshaft engines. These engines are installed on, but not limited to, Eurocopter France model AS 332C, AS 332L, and AS 332L1 helicopters.
Compliance
You are responsible for having the actions required by this AD performed before June 30, 2008, unless the actions have already been done. (f) Replace the selector-comparator board in the ECU with a board incorporating Turbomeca Modification TU 250. Information on Modification TU 250 can be found in Turbomeca Mandatory Service Bulletin No. 298 73 0250, dated March 23, 2007. Alternative Methods of
Unsafe condition
This AD results from recent unexplained reversions of the electronic control unit (ECU) to the 65% N1 back-up mode. The actions specified in this AD are intended to prevent dual-engine continued operation at 65% N1 after reversion of the ECU to the 65% N1 back-up mode due to temporary loss of N2 speed signal, which could lead to inability to continue safe flight, emergency autorotation landing, or an accident.
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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