100 lbs * 500 passengers is 50k pounds or about 10% of the max takeoff weight quoted there. Those numbers seem likely to be over-estimates, but that seems not inconsequential?

Edit: the plane holds 328-550 depending on seat configuration per the above link. I went with the upper end of that range per consideration of the “safety considerations” indicating it is the upper end of that range that is being reconsidered.