AD 2020-25-05
Unsafe Condition
Cracks have been reported at different positions on two affected propeller hubs, which could lead to in-flight propeller detachment, possibly resulting in damage to the airplane and/or injury to persons on the ground.
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Required Actions
Amend the existing aircraft flight manual (AFM) with abnormal propeller vibration instructions. Visual inspection and non-destructive test (NDT) inspection of the propeller hub are required. Depending on the results of the inspections, replacement of the propeller hub with a part eligible for installation is required. The propeller hub must be replaced before exceeding 30 years since the date of manufacture or within 30 days after the effective date of this AD, whichever occurs later.
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Compliance Time
Before exceeding 30 years since the date of manufacture or within 30 days after the effective date of this AD, whichever occurs later.
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Affected Aircraft
All Hoffmann model HO-V 72 propellers, regardless of their use.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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