Fuel

Question 1

Describe the Fuel Tanks

Answer 1

• 2 Wet Wing tanks are integrated into the two wings.
• They extend from the fuselage to the rib just inboard of the ailerons.
• The are separated into the Surge Bay, Main Tank, and Collector bay.
• They are vented.

Question 2

Describe the Surge Bay.

Answer 2

• Located just inboard of the aileron.
• Used for venting and fuel recovery.
• Two outboard float vent valves and one inboard vent line allow pressure regulation between the surge bay and the associated main tank.
• NACA Vents allow for fuel overflow and positive pressure in flight.

Question 3

Describe the Main Tank

Answer 3

• Stores the majority of the fuel and

- continuously feeds it to the collector bay.

Question 4

Describe the Collector Bay

Answer 4

• provides a steady supply of fuel to the engine,
• Scavenge ejector pumps, continuously draw fuel
  from the main tank and deliver it to the collector bay
• flapper check valves (allowing only a one-way flowinto the collector bay) ensure a constant gravity-fed fuel flow into the collector bay.
• Each contains a (motive flow) Primary Ejector Pump which provides fuel to the Fuel Metering Unit (FMU).
• Each contains an AC, electrical, auxiliary fuel pump.

Question 5

What is the total fuel capacity?

Answer 5

11,724# (5,862 #/tank)

Question 6

What does an ENG FUEL PRESSURE Caution Light indicate?

Answer 6

That the FMU is not getting adequate feed pressure, very possibly due to an Ejector Pump Failure, and that an Auxiliary Fuel Pump should be employed.

Question 7

How can fuel quantity be determined?

Answer 7

• The fuel quantity computer uses nine capacitance type probes to determine fuel quantity, and displays that data in various ways on the ED and the MFD Fuel pages.
• A magnastick can be used to determine quantity - 700 gal is full.
• TANK FUEL LOW Caution Lights indicate that the collector bay has less than ~305#.