Originally Posted by
overstress
awair, all very well, but if your company ops manual says you can disregard unburned taxi fuel, (as mine does) then that's what I will continue to do. I can hardly be committing a wrong if the manual says you can do it.
Good, so let's say your structural MTOW is 300t and your Max Ramp Weight is 302t (random figures). You're well packed today, long flight so no MLW issues and you pushback at 302T. Your loadsheet has a 2t taxi fuel. ATC now changes runway in use to a runway that is just less than 2 min taxi from your current position. Happy days ! Setup, no problems with performances (long big runways sea level no obstacles lovely temperature etc..) quick rebrief and off we go, we've saved 30-45 min taxi and we are about to takeoff at 301t (1t above your MTOW). So your Company manual says you can disregard unburned taxi fuel, hence who cares ? We're super legal, let's exceed a limitation. You happily takeoff and a few hours later people working in your flight safety office get a nice red flag on the OFDM and call you for tea and biscuits. From there you learn to read the manuals, read the SOP and also "think" about what you are doing.