AD 2005-24-09
Unsafe Condition
Propeller hubs with improperly machined socket retention threads could cause concentrated loading on the threads, resulting in cracking of the hub and blade separation, which could lead to failure of the propeller hub, blade separation, and loss of control of the airplane.
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Required Actions
Remove affected propeller hubs from service within 10 flight hours or 10 days after the effective date of this AD, whichever occurs first. Send the affected propeller hubs to a McCauley Service Center. Before assembly into a replacement propeller hub, visually inspect the retention nut threads with a 10-power magnifier and replace the nut if necessary.
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Compliance Time
Within 10 flight hours or 10 days after the effective date of this AD, whichever occurs first.
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Affected Aircraft
McCauley Propeller Systems propeller assemblies, models 2D34C53/74E-X; D2A34C58/90AT-X; 3AF32C87/82NC-X; D3AF32C87/82NC-X; D3A32C88/82NC-X; D3A32C90/82NC-X; and 3AF34C92/90LF-X, with specific serial numbers listed in Table 1 of the AD.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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