AD 2005-13-25
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Arriel 2B Turboshaft Engines |
Unsafe Condition
Hydromechanical unit (HMU) acceleration controller axle sticking, leading to loss of control of engine fuel flow in manual or mixed control mode, resulting in engine overspeed and in-flight engine shutdown, or uncommanded in-flight engine shutdown.
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Required Actions
Inspect, clean, lubricate, and check for proper operation of the HMU acceleration controller axle using Turbomeca Alert Mandatory Service Bulletin No. A292 73 2814, Update No. 1, dated January 11, 2005. Initial inspection must be completed within 20 operating hours after the effective date, followed by repetitive inspections as specified.
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Compliance Time
Within 20 operating hours after the effective date
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Affected Aircraft
Turbomeca S.A. Arriel 2B turboshaft engines with Modification TU62A incorporated, installed on, but not limited to, Eurocopter AS350B3 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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