AD Amdt-39-11139
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model AS-350B, B1, B2, B3, BA, and D | Airworthiness Directives; Eurocopter France Model AS-350B, B1, B2, B3, BA, and D Helicopters, and Model AS 355E, F, F1, F2 and N Helicopters |
Unsafe Condition
Wear of the tail rotor spider plate bearing can lead to brinelling, increased tail rotor vibration levels, and potential bearing seizure, resulting in loss of tail rotor control and subsequent loss of helicopter control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the tail rotor spider plate bearing for proper bearing rotational torque, axial play, and brinelling. Replace the bearing if any deficiencies are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Eurocopter France Model AS-350B, B1, B2, B3, BA, and D helicopters, and Model AS 355E, F, F1, F2, and N helicopters.
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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