AD 2021-20-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Failure of the tail rotor servo-actuator (TRA) feedback lever, which could result in loss of tail rotor control and subsequent loss of control of the helicopter.
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Required Actions
Repetitive inspections of the TRA, repetitive inspections and checks of the tail rotor duplex bearings (TR DB), installation of an improved TRA and TR DB, repetitive installations and checks of thermal strips, replacement of the improved TR DB (life limit), and applicable corrective actions, as specified in a European Union Aviation Safety Agency (EASA) AD.
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Compliance Time
Before further flight
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Affected Aircraft
Leonardo S.p.a. Model AW169 and AW189 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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