Weight is such arbitrary crap. The criteria for setting aircraft maintenance and training standards should be based solely on whether you as an individual can buy a ticket on it, or a group can hire it. All of which should be classified as 'public transport' - forget whether it is 'regular'. What's running to a schedule got to do with safety? Or weight? Would you accept that the brakes on the Toyota Coaster your kids go to school in were maintained to a lesser standard than the brakes on a Greyhound Bus? Or that the driver of the Coaster was allowed to be less competent?