Earl,
Maybe you need to get out more often!
Do a YT search for any logging or firefighting operation. Common occurrence and on many occasion I have found several things that would have been an issue had I not taken a look.
TRGB Oil leak, hydraulic pump leaks, etc etc.
Remember these types of aircraft on ops on a typical day may fly over 12 hours without a shutdown.
Check out an S64 turnaround, there's probably 2 guys looking at the turning parts.
You cannot afford not to.