AD 94-02-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Wytwornia Sprzetu Komunikacyjnego | PZL-3S 2nd Series | Airworthiness Directives; Wytwornia Sprzetu Komunikacyjnego "PZL-RZESZOW" PZL-3S Second Series Engines |
Unsafe Condition
Separation of the propeller and loss of the aircraft due to cracked or broken propeller-flange attachment bolts, and distress in the rear crankshaft, rear counterweight, or rear counterweight pins.
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Required Actions
Remove and replace pistons modified with specific compression, scraper, and oil control rings (P/N JRS 123421, JRS 123423, JRS 123424). Inspect propeller-flange attachment bolts for cracking/failure using 10x magnification. Replace cracked/broken bolts, disassemble and inspect rear crankshaft components for distress, and replace distressed parts. Retorque loose propeller-flange retaining nuts per servicing instructions and replace all bolts with new ones. Alternative methods may be approved by the Engine Certification Office.
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Compliance Time
prior to further flight
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Affected Aircraft
Wytwornia Sprzetu Komunikacyjnego "PZL-RZESZOW" PZL-3S Second Series engines installed on but not limited to Grumman AG CAT aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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