AD 2006-23-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Dowty Propellers R321/4-82-F/8; R324/4-82-F/9; R333/4-82-F/12; and R334/4-82-F/13 Propellers |
Unsafe Condition
One propeller blade has been identified where the blade counterweight capscrew holes have not been correctly drilled. If the capscrew holes are not machined to their required depth, the counterweight will not be properly retained, potentially leading to capscrew failure and counterweight release during operation.
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Required Actions
Inspect propeller blades to verify the capscrew holes are correctly drilled to the required depth. Replace or rework blades where the capscrew holes are not correctly machined. Follow Dowty Propellers Alert Service Bulletins ASB No. 61-A1133 and ASB No. 61-A1134 for corrective actions.
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Compliance Time
Before further flight
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Affected Aircraft
Dowty Propellers R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 propellers, specifically blades manufactured between April and July 2006, as identified by serial number.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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