AD 2002-14-26
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Arriel Models 1A, 1A1, 1B, 1D, and 1D1 Turboshaft Engines |
Unsafe Condition
The cantilevered axis of the free turbine moving from its design position and inducing blade trajectories outside the current design free turbine containment area, which can lead to uncontainment of the free turbine during an overspeed event.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install containment shield rings around the free turbine blade area. Install a double support around the gearbox free turbine bearing housing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca S.A. Arriel models 1A, 1A1, 1B, 1D, and 1D1 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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