AD 2013-01-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Deterioration and loss of the low-pressure drive function within the hydro-mechanical metering unit (HMU) causing low fuel pressure, which could lead to an uncommanded in-flight shutdown of the engine and possible loss of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the HMU with an eligible HMU before it exceeds 800 operating hours since new, or within 800 operating hours since the last replacement of specific components within the HMU.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 800 operating hours of the HMU since new or since the last replacement of specific components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Turbomeca S.A. Arriel 2D turboshaft engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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