Propeller Problems

The following is derived from maintenance facility submissions to the FAA’s Service Difficulty Reports database.

Aviation Safety

Monday, March 03, 2025 at 05:00 AM ET

Verified

Key Takeaways:

Various propeller component failures, including worn hub pistons, hub cracks, and governor malfunctions, can cause issues like oil leaks, unresponsive controls, and engine overspeed.
Propeller blade or tip separations and breakages are also reported, leading to severe engine vibration and partial power loss.
These critical propeller malfunctions consistently result in emergency situations, necessitating forced landings or urgent returns to the airport across a wide range of operational hours.

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Cessna R182 Skylane RG

Worn Hub Piston

Propeller was leaking oil, so it was removed and sent it off to be resealed. Prop shop discovered the piston had worn out of spec. Scoring was found on the inside of the piston where it rides on the guide. Wear marks were 180 degrees apart on the front and back. The piston was cocked while moving on the guide rod. Part replaced and prop was resealed.