AD Amdt-39-16788
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 and repetitive ultrasonic inspections of the rear wall of the rear half of the propeller hub for cracks. Replace propeller hub, P/N 660709201, with a new propeller hub, P/N 660717226, as an optional terminating action.
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Compliance Time
Within the compliance times specified in Table 1 of the AD, unless already done.
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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, part number (P/N) 660709201.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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