| Display Selector |
| Fuel Panel |
Center Tank Pumps
OFF – Deactivates the fuel pump. The corresponding LOW
PRESSURE lights are disarmed when the Center Tank Pump
switches are OFF.
ON – Activates the fuel pump. The corresponding LOW
PRESSURE lights are armed and will illuminate if a low fuel
pressure condition exists.
Center tank pumps produce higher pressure than main tank
pumps. This ensures that center tank fuel is used before main
tank fuel, even though all fuel pumps are operating.
Both engines are normally pressure fed from the center tank until
the center tank quantity decreases to near zero. The engines are
normally then pressure fed from their respective main tanks.
Center Tank Fuel Scavenge Jet Pump
With the main tank fuel pump No. 1 FWD Switch ON, the center
tank fuel scavenge jet pump operates automatically to transfer any
remaining center tank fuel to main tank No. 1. Fuel transfer begins
when main tank No. 1 quantity is about one-half. Once the fuel
scavenge process begins, it continues for the remainder
of the flight.
OFF – Deactivates the fuel pump. The corresponding LOW
PRESSURE lights are disarmed when the Center Tank Pump
switches are OFF.
ON – Activates the fuel pump. The corresponding LOW
PRESSURE lights are armed and will illuminate if a low fuel
pressure condition exists.
Center tank pumps produce higher pressure than main tank
pumps. This ensures that center tank fuel is used before main
tank fuel, even though all fuel pumps are operating.
Both engines are normally pressure fed from the center tank until
the center tank quantity decreases to near zero. The engines are
normally then pressure fed from their respective main tanks.
Center Tank Fuel Scavenge Jet Pump
With the main tank fuel pump No. 1 FWD Switch ON, the center
tank fuel scavenge jet pump operates automatically to transfer any
remaining center tank fuel to main tank No. 1. Fuel transfer begins
when main tank No. 1 quantity is about one-half. Once the fuel
scavenge process begins, it continues for the remainder
of the flight.
