Fuel Flashcards
Can the LEFT forward pump be switched off if it is supplying fuel to the APU on the ground with the APU running?
No, the pump cannot be turned off
Where does the total fuel value come from?
From a separate calculation in the fuel quantity processor
Wing main tank pumps ‘PRESSURE’ lights comes on for:
All of the above (Low pressure, pump switch off, pump failure)
How can you tell if the fuel pump switch is off?
The bar and ON will be out of view
What action, if any, is required when starting the APU with battery power only
No action is required, the DC fuel pump starts automatically
With the engines running, when will the centre pump low PRESSURE lights illuminate?
When pump pressure is low and no usable fuel is in the centre tank with the centre pumps on
Fuel temperature is taken from:
The left main tank
Surge tanks are installed in each wing tip and accommodate fuel expansion.
True
How are the fuel quantity figures on the FUEL QTY panel computed?
By fuel processors that receive data from sensors located in fuel tanks
You have activated all pumps switches for engine start. Main fuel pumps come on immediately, centre pumps do not. In this case, why aren’t the centre pumps on?
Centre pumps are inhibited when N2 is below 50%
If no boost pumps are available, engines can suction fuel from main tanks only.
True
You manually enter total fuel volume into PERF INIT page. On what will the FMCs base their fuel computations?
Calculated value
The FUEL CONFIG light is illuminated in case of:
All of the above (low fuel quantity, imbalance between left and right main tanks, centre tank fuel pumps off with fuel in centre tanks)
The two centre tank fuel pumps have approximately twice the output pressure of the left & right main tank fuel pumps. When all six pumps are operating, the centre tank pumps override the left & right main tank pumps so that centre tank fuel is used before left or right main tank fuel
True
For the B767-300, from which tank can you jettison fuel from?
Centre tank
