Maybe they should think about including this area in pre-flight inspections, just a thought. I suppose it depends on how easily the gear door can be lowered.
Curiously enough, the A330, a similar size a/c for those not of an anorak disposition, does include a 'doors open inspection' (at least on an etops check.)
It is possible that it is an airline requirement not a AMS one, I am not sure.