Ungoverned Propellers

Editorial Staff

Wednesday, July 19, 2023 at 12:52 PM ET

Verified

Key Takeaways:

Multiple aircraft experienced diverse propeller control malfunctions, including an inability to unfeather, low engine RPM, propeller overspeed, and difficulty exiting the beta range.
In most reported incidents, replacing the propeller governor successfully resolved the operational discrepancies and restored normal propeller function.
One propeller governor was found to have internal pump cavity damage, rendering it beyond economical repair and contributing to low RPM issues.

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Beech 300 King Air

No Unfeather Ability

Editorial Staff