AD 2003-01-03
Unsafe Condition
Manufacturing quality control issues in two-bladed aluminum propeller hubs may lead to in-flight propeller blade separation, causing airframe and engine damage, and potential loss of the airplane.
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Required Actions
Remove from service propeller hubs with specified serial numbers and part numbers D-6522-1, D-6522-2, D-6529-1, and D-6559-3. Replace with serviceable hubs.
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Compliance Time
Before further flight
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Affected Aircraft
Hartzell Propeller Inc. model ( )HC-( )2Y( )-( ) propellers with certain serial numbers of two-bladed aluminum propeller hubs part numbers D-6522-1, D-6522-2, D-6529-1, and D-6559-3.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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