AD 2005-19-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | Arrius 2 F | Airworthiness Directives; Turbomeca Arrius 2 F Turboshaft Engines |
Unsafe Condition
Improperly assembled and subsequent failure of the constant delta pressure (delta P) diaphragm in the fuel control unit (FCU) can lead to an increase in fuel flow, resulting in overspeed of the gas generator and power turbine, and potential turbine blade separation, causing an uncommanded in-flight engine shutdown.
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Required Actions
Remove from service certain serial number (SN) fuel control units (FCUs) or replace the constant delta P diaphragm in those FCUs. Use the procedures described in Turbomeca Alert Mandatory Service Bulletin (MSB) No. A319 73 4825.
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Compliance Time
As soon as practicable but not to exceed February 28, 2006.
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Affected Aircraft
Turbomeca Arrius 2 F turboshaft engines with fuel control units listed by serial number (SN) in Turbomeca Alert Mandatory Service Bulletin (MSB) No. A319 73 4825, dated August 3, 2005. These engines are installed on, but not limited to, Eurocopter EC120B helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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