bluskis
The reason that nobody has commented on the fuel pump issue is that it has no relevance to this thread. As 411A states, the fuel required to keep the pumps covered is treated as unusable fuel. The weight of this fuel is added to the ZFW before any flight planning takes place. On some of the longer sectors this might mean leaving some payload behind. However, on some sectors such as the West Coast US to LHR we actually arrive with more fuel than usual due to the CWT minimum fuel requirements.
Airclues