I believe an actual overhaul also involves some blade work, which can be done at some prop shops:
-Replacement of the erosion shield
-Paint repair (typically the backside black paint is all chipped up.
-Repairs to minor damage at the wingtips.
-There is also a test procedure to validate the integrity of the wood core. *
-Inspection to ensuring no damage/excessive wear to the blade ferrules. *
* Failure of either of these means work that must be done in Germany. In my experience that adds months to the turnaround.
Way back when (2004?) there was actually a recall on the hub itself. Ours was replaced at the time under warranty. If somehow this is one of the old style hubs (it looks odd) this would also need replacement.