In my Aviation world, we don't do w/b for the Pilots. So, while reading through our Ops Specs today, I noticed under the W/B section that there is a provision for a "substantially heavier crew." Then it listed the formulas and ticks for a heavier crew and lighter crew. Does anybody know what is above and beyond an average crew weight? I laughed while I was reading it, but this is actual information I would like.