I'm confused about something, perhaps somebody can clarify.
As I understand it, single engine airplanes with constant speed props are set up to go to fine pitch, not coarse, upon loss or reduction of governor oil pressure - so that you can still make power.
Twin engine airplanes with constant speed props are set up to go to coarse pitch (feather) upon loss of governor oil pressure - so that you minimize drag on the side with the failed engine.
Yet this incident seems to indicate that an RV-10 (single engine) went to coarse pitch, with 500 RPM lower than expected upon governor failure, which seems strange.
This seems to be a different failure mode than the Todd Stovall RV-10 failure from another thread [or at least different symptoms - coarse pitch (lower RPM) instead of fine pitch (potential overspeed)] - that is, unless this is a prop set up for a multi-engine installation, which seems very unlikely.
What am I missing here?