AD Amdt-39-10920
Unsafe Condition
Insufficient cold rolling of the beveled radius of the blade flange can lead to propeller blade cracks, potentially resulting in blade separation and damage to the aircraft.
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Required Actions
Remove affected propeller blades from service and ship them to designated repair facilities for inspection. Replace or repair blades as necessary based on inspection findings.
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Compliance Time
Before further flight
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Affected Aircraft
Hamilton Standard 54H60 series propellers, identified by specific serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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