AD 58-04-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hartzell Propeller, Inc. | HC-93Z20-2 | HARTZELL Models HC-93Z20-2C and -2B Propellers |
Unsafe Condition
Failure of the A-1307 split ring permitted the propeller blade to leave the hub.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace A-1307 split ring with A-1331 split ring and replace A-1303 bearing with A-1303A bearing. Stamp modified propellers as HC-93Z20-2B1 or -2C1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to next flight
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Affected Aircraft
Hartzell Propeller, Inc. HC-93Z20-2C and -2B Propellers with hub Serial Numbers 100A through 361A and above
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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