AD 2020-22-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Austro | Engine GmbH | Airworthiness Directives; Austro Engine GmbH Engines |
Unsafe Condition
Occurrences were reported where, on some engines, turbocharger waste gate control rods were found broken and/or disconnected. Investigation results indicate that these failures were due to insufficient fatigue life or improper handling of the waste gate control rod and improper installation of the non-spring-loaded circlip.
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Required Actions
Replace the waste gate controller and the circlip on condition, and install a waste-gate control-rod fail-safe bridge and a new circlip, which cancels the life limitations.
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Compliance Time
Before further flight
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Affected Aircraft
All Austro Engine GmbH model E4 and E4P diesel piston engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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