Fuel Feed
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. Check valves are located throughout the fuel system to ensure the proper
direction of fuel flow and to prevent transfer of fuel between tanks.
Fuel Pumps
Each fuel tank uses two AC powered fuel pumps which are cooled and lubricated by fuel
passing through the pump. 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. Individual pressure sensors monitor the output pressure of each
pump.
Option - with Center Tank Fuel Pump Auto-shutoff
Each center tank pump will automatically shut off, after a short delay, when that pump’s
sensor detects low output pressure.
Note: The fuel pump LOW PRESSURE lights may flicker when tank quantity is low and the
airplane is in a climb, descent, or on the ground with a nose-down attitude.
