AD 2005-25-10
Unsafe Condition
Propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane.
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Required Actions
Perform initial ultrasonic inspections of the rear halves of propeller hubs P/N 660709201 within specified timeframes. Perform repetitive ultrasonic inspections within 300 flight hours or flight cycles since last inspection for Type R334/4-82-F/13 assemblies, and within 1,000 flight hours for other types. Inspect stored propeller assemblies before installation.
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Compliance Time
Within 10 flight hours or 20 days for Type R334/4-82-F/13, and within 50 flight hours or 60 days for other types, depending on the assembly.
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Affected Aircraft
Dowty Propellers Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 propeller assemblies with propeller hubs P/N 660709201.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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