AD 2016-08-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Failure of the constant delta-pressure (delta-P) diaphragm of the fuel metering valve, which could result in an uncommanded in-flight shutdown and damage to the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the pre-TU 193 adjusted high-pressure/low-pressure pump and metering valve assembly and replace it with a part eligible for installation. Replace the constant delta-P diaphragm of the fuel metering valve.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 operating hours after the effective date of this AD or prior to exceeding 880 operating hours since new on the adjusted HP/LP pump and metering valve assembly, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Turbomeca S.A. Arriel 2E turboshaft engines that have a pre-TU 193 adjusted high-pressure/low-pressure (HP/LP) pump and metering valve assembly installed.
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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