They're essentially critical oil pumps, and neglect by ignoring calendar-time inspections and overhauls can lead to corrosion and catastrophic failures.
That’s a shot of the propeller hub assembly, left, on a Piper Arrow with the spinner off and ready for an eddy current inspection for AD compliance. Separate from the governor, it’s important to inspect the hub on a regular basis, especially after a prop strike.
Step up to a complex airplane and eventually you’ll deal with maintaining the constant-speed propeller governor. While instructors rarely teach more than the things to look for on the preflight walk-around (oil slung on the prop blades, for one), not enough emphasis is placed on the importance of keeping the governor healthy, while also recognizing […]
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