Originally Posted by
ACMS
The Tanks are not empty and the pumps are always completely covered with fuel. If the tanks were empty the fault light in the associated pumps would illuminate.
Furthermore the Tanks are hardly ever completely full so there will always be fuel vapor present unless there is an inerting system fitted ( A350 )
Just follow your Airbus SOP for the type you are on.
SIMPLE.
the fault light means low pressure at the pump outlet , it has Nothing to do with the fuel tank qty , empty or full
totally agree with this : "Just follow your Airbus SOP for the type you are on."