Ungoverned Propellers

Editorial Staff

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

Verified

Key Takeaways:

Multiple aircraft models experienced diverse propeller control issues, including unfeathering failure, low/unstable RPM, overspeed, and abnormal beta range operation.
In all reported incidents, the propeller governor was identified as the problematic component, subsequently replaced or found to have internal damage.
These governor malfunctions directly impacted engine performance and required maintenance, with replacement of the governor being the common resolution.

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Beech 300 King Air

No Unfeather Ability

Editorial Staff