AD 2015-13-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Failure of the engine accessory gearbox (AGB), specifically the 41-tooth gear forming part of the 41/23-tooth bevel gear, which could lead to in-flight shutdown and damage to the engine, potentially resulting in damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a one-time vibration check of the AGB 41/23-tooth bevel gear meshing for specified Arriel 1B, 1D, 1D1, 2B, and 2B1 engines. For all Arriel 1 and Arriel 2 engines, perform repetitive vibration checks of the AGB at every engine shop visit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 32 months of the effective date for the one-time vibration check on specified engines. Repetitive checks are due at every engine shop visit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Turbomeca S.A. Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, 1S1, 2B, 2B1, 2C, 2C1, 2C2, 2S1, and 2S2 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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