Originally Posted by
krismiler
If everyone departed with maximum fuel consistent with landing weight limits there would be very few diversions or Mayday fuels. However the excess fuel used would be horrendous and seriously affect profitability.
If everyone departed with the minimum fuel legally required there would be many more diversions and Mayday fuels. The resulting disruptions would also seriously affect profitability, not to mention the safety issues.
The answer lies somewhere in the middle, I’m convinced we’re too near the second option at the moment.
Do not forget that taking off with max fuel also means a heavier, faster landing with more fuel which is a risk in itself.
Exceptional circumstances is exactly why there is a final reserve, but it needs to be investigated when it is used.