FUEL SYSTEM

6790 lbs useable

1006 gallons

(503 gallons each wing)

400 lbs max imbalance

800 lbs max (emergency)

Pressure Refuel

55 psig Pressure

-10 psig Defueling

Fuel Press switch on

@ 5  psi off @ 7 psi

Normal Pressure 27 psi

Fuel Low Level Light

On @ 360 ± 20 lbs

Boost Pump Switch On

Low Fuel Light and/or 400 lbs remain

Boost Pump 17-26 psi

On:    On

Off:   Off

Auto: Start

         Crossfeed

         Low Pressure

Fuel Filter Light

4 psi pressure differential across the fuel filter

(Bypass Capability)

Fuel Drains:

4 Fuselage

1 Above Wheel Well

4 ejector pumps

One primary which receives motive flow from the engine driven fuel pump. The other three operate on motive flow from the primary ejector or boost pump, and transfer fuel from the lowest point in the tank to the "fuel hopper".

Primary Ejector Pump

8-22 psi

Motor-Driven Crossfeed valve

Engine Driven Fuel Pump is not a suction pump and must receive fuel under pressure from the wing tank. 

If this pump fails, the engine will flame out.

High Pressure Pump in the Fuel Control Unit (FCU)

11 Fuel nozzles - Form a precise atomized spray pattern.

Crossfeed 700-900 lbs/hr

Approx 10-12 min for 200 lbs

Normal Fuel Flow:

1st  Hour  1700 lbs/hr

2nd Hour  1400 lbs/hr

Add'l         1300 lbs/hr

(with APU on)