AD 2007-08-02
Unsafe Condition
Excessive propeller vibration and damaged or broken propeller blade thrust bearings found during routine and investigative propeller disassembly, leading to propeller blade separation, damage to the airplane, and possible loss of airplane control.
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Required Actions
Initial and repetitive inspections and rework of the propeller blade retention radius, and replacement of the propeller blade thrust bearing for each blade. Actions must be performed using Hartzell Propeller Inc. Service Bulletin HC-SB-61-287, Revision 2.
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Compliance Time
Within 100 operating hours after the effective date for propellers with 4,000 or more operating hours TSO; at the next propeller disassembly for propellers with 2,000 or more operating hours TSO but fewer than 4,000 operating hours TSO; and thereafter, after every 3,000 additional operating hours time-in-service.
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Affected Aircraft
Hartzell Propeller Inc. model HC-E4A-3( )/E10950( ) propellers installed on, but not limited to, Raytheon Beechcraft 1900D airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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