I've found quite a number of faults over the years, all pretty mundane and what you would expect from time to time though.
Squashed oleos (club)
Dings in prop that needed filing out (group_
Faulty stall warners (club)
Faulty pitot heaters (club)
Faulty lights (club and group)
Loose screws on cowling (club)
Oil leak in engine bay (group)
Bald tires (group)
Very worn disc pads (club)
Weeping brake calipers (club)
Blocked pitot (club)
Seized brake (group)
Tripping alternator (group)
Failed Turn Coordinator (club)
Detached dorsal faring (group)
Water in fuel (club)
Plenty of abandoned pens and pencils happily rolling around the floor (club)
I think that's it.