AD 98-17-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hartzell Propeller, Inc. | HC-E4A | Airworthiness Directives; Hartzell Propeller Inc. HC-E4A-3(A,I,J) Series Propellers |
Unsafe Condition
Counterweight clamp bolt hole thread failure resulting in counterweight and propeller blade separation, and possible damage to the aircraft.
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Required Actions
Perform a one-time inspection of the propeller blade counterweight clamps for thread damage in the bolt holes per Hartzell Propeller Inc. Alert Service Bulletin HC-ASB-61-237. Replace non-compliant clamps with serviceable parts and reassemble as specified.
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Compliance Time
Within 300 hours time in service (TIS) or 45 days after August 31, 1998, whichever comes first, for propellers with 2,500+ hours TIS since last overhaul. For others, within 600 hours TIS or 90 days after August 31, 1998, whichever comes first.
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Affected Aircraft
Hartzell Propeller Inc. HC-E4A-3(A,I,J) series propellers with serial numbers HJ1 through HJ1040, installed on aircraft such as Raytheon (Beech) 1900D series.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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