Thanks Cobra for starting this thread coz I've been scratching my head over this subject for a long time. EU and FAA regulations and methodology are quite complicated. I've been thinking whether there are easier alternatives. Wonder if something like weighing the aircraft on the ramp, deducting the known load, then averaging out the pax weight. ANy thoughts? A survey to weigh the pax are both costly and impossible. I agree that the IATA and ICAO or maybe the ACI should work together and look into a more effective solution.