The nose gear door has a couple of grounding straps. Seems like they are broken alot.
I think MLG doors also have straps, don't remember.
The GLD's and spoilers, spoilerons also have them. select man/deploy to check
Any scratch below the cargo door strike plate needs to be checked out
The ADG placard needs to be in place. Hard to find those sometimes.
The cargo bin liner must not have any perforations (they all do)
Leading edge gap seals. There is a cumulative maximum allowable missing (check CDL)
H2O extinguisher. If the wire isn't intact and the CO2 cartridge is pierced, you need a WHOLE NEW EXTINGUISHER cause they have to weight it to make sure it is properly filled.
Nose gear steering armed placard. Lots of them unreadable.
Seats and or adjustments are no go if they are uncomfortable
Bug washes should be mandatory every turn, so should lav dumps.
All I can think of right now
Fly safe