During annual.

[JAG]

I am not sure what's normal, but I can tell you that I remove the wing root panels. This allows me to inspect wing attach points, fuel selector valves (visual and lubricate) and general visual of wiring, cables and fuel lines for any issues.

I don't normally remove the wing tips - as I can inspect function of the fuel vent valves on my A model without removing. That is about the only thing under my wingtips that are worth looking at. That being said, I remove them every second annual so I can have a good visual look around for any mud daubers.

Jeff