AD 2017-04-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Safran | Helicopter | Airworthiness Directives; Safran Helicopter Engines, S.A., Turboshaft Engines |
Unsafe Condition
Reports of fuel leaks originating from the drain valve assembly (DV) on certain Arriel engines.
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Required Actions
Replace the affected DV with a DV eligible for installation. If a fuel leak is detected during inspection, replace the DV before the next flight. If no fuel leak is detected, wrap the DV with self-amalgamate tape before the next flight.
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Compliance Time
Within 10 flight hours or 7 days, whichever occurs first, after the effective date of this AD.
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Affected Aircraft
All Safran Helicopter Engines, S.A., Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, and 1S1 turboshaft engines equipped with a drain valve assembly (DV) with a part number and a serial number listed in Appendix 5.1 of Safran Helicopter Engines Alert Mandatory Service Bulletin A292 73 0851, Version A, dated January 31, 2017.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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