AD Amdt-39-10289
Unsafe Condition
Manufacturing defect in counterweight clamp bolts resulted in blade counterweight separation and propeller damage.
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Required Actions
Replace propeller blade counterweight clamp bolts with improved bolts.
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Compliance Time
Before further flight
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Affected Aircraft
Hartzell Propeller Inc. Model HC-E4A-3(A,I) propellers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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