Ungoverned Propellers

Editorial Staff

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

Verified

Key Takeaways:

Multiple aircraft experienced various propeller control issues, including unfeathering difficulties, low RPM, overspeed, and abnormal force when exiting the beta range.
These discrepancies were consistently attributed to malfunctioning propeller governors, regardless of aircraft type.
Replacement of the propeller governor was the common solution, though one unit was found to have internal pump cavity damage, rendering it beyond economical repair.

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Beech 300 King Air

No Unfeather Ability

Editorial Staff