AD 2018-16-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; GE Aviation Czech s.r.o. Turboprop Engines |
Unsafe Condition
A fatal accident of an L 410 UVP-E20 aeroplane has been reported. Preliminary investigation determined that there was an annunciation of Beta mode on right hand engine, that the propeller went inadvertently behind the fine pitch position and reached a negative thrust position, and that the pitch lock system did not intervene.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
This AD requires adjusting the engine push-pull control and replacing the beta switch to prevent the propeller governor control going to a negative thrust position.
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Compliance Time
Before further flight
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Affected Aircraft
GE Aviation Czech H80-200 turboprop engines installed on certain Aircraft Industries (AI) L 410 UVP-E20 and L 410 UVP-E20 CARGO aeroplanes, if equipped with Avia Propeller AV 725 propellers.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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