AD 2007-19-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Turbomeca Arriel 2B1 Turboshaft Engines |
| engine | Turbomeca | Arriel 2B1 | Airworthiness Directives; Turbomeca Arriel 2B1 Turboshaft Engines |
Unsafe Condition
Rupture of the constant delta pressure valve diaphragm on Turbomeca Arriel 2B1 turboshaft engines, due to wear of the delta P diaphragm fabric.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive replacement of the HMU with a serviceable HMU every 1,500 hours-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 1,500 hours-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca Arriel 2B1 turboshaft engines installed on, but not limited to, Eurocopter AS 350 B3 and EC 130 B4 helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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