Luftfahrer From Germany, joined Mar 2009, 1013 posts, RR: 2
Reply 1, posted (11 months 1 week 4 days 22 hours ago) and read 3762 times:
You can put in the amount of fuel (in kg or lb) you plan to have as a reserve at your destination airport. If the FMC computes that you would have less fuel in the tanks than the value you have entered, you would get a warning saying either 'INSUFFICIENT FUEL' while on the ground or 'USING RSV FUEL' when you are already in the air.
Et là tu montes encore plus haut et ça persiste, alors on vole