On most flights, BRW is determined by the MZFW plus TOTAL FUEL
this means payload capacity is NOT restricted by t/o / lndg weight limits
On Long Flights;
with > 25850kg ( 89350-63500) FOB incl reserves, BRW is determined by MBRW (89350)
This means the actual ZFW will be
If Payload given:
Then ‘actual ZFW’ is known and so the MBRW is determined by fuel loaded in addition to the ‘ActZFW’.
This is either Min fuel (company policy/Max fuel - Max fuel may be;
≤ 31 402kg (tank capacity)
Max fuel permitted will be the difference between ActZFW and either BRW/LW/Structural Weight limits