Fuel System

Question 1

What is the total fuel capacity of the GIV, GIV-SP and G400 aircraft?

Answer 1

29,500 lbs, however any level without exceeding maximum ramp weight or any other limitation is acceptable

Question 2

What is the total fuel capacity of the G300 aircraft?

Answer 2

26,900 lbs, however any level without exceeding maximum ramp weight or any other limitation is acceptable

Question 3

What is the maximum capacity of each fuel hopper tank?

Answer 3

190 gallons (Approximately 1270 lbs)

Question 4

When a fire handle is pulled, where is the fuel shut off?

Answer 4

At the tank (engine fuel feed shutoff valve)

Question 5

How is pressure fueling terminated from the flight deck?

Answer 5

By selecting the left and right remote fueling shutoff switches to CLOSED

Question 6

Where is the amber “FUEL LEVEL LOW” indication displayed?

Answer 6

• On the CAS
• Standby fuel quantity indicator will display “LOW FUEL”

Question 7

What is boost pump auto change?

Answer 7

If one pump on either side is selected “OFF” and the operating pump fails, the Selected Off Pump will automatically turn on.

The corrective action is to match the switches to the condition.

Question 8

What malfunctions or actions might cause a red “FUEL PRESS LOW” CAS message to illuminate? (3)

Answer 8

• If the fuel pressure at the engine driven high pressure fuel pump inlet is less than 15 psi
• A fuel leak in the engine fuel system
• Both fuel boost pumps on one side turned OFF with the crossflow valve CLOSED

Question 9

What is the corrective action required if a red “FUEL FILTER” CAS message illuminates?

Answer 9

Reduce power to 75% HP RPM on the affected engine and check for engine fuel temperature increase ≥ 5º C

Question 10

How is the fuel system configured with a dual converter failure?

Answer 10

One main boost pump selected ON with the crossflow valve OPEN

Question 11

What is the function of the pressure fueling static port underneath each wing?

Answer 11

To provide a static pressure reference for the tank pressure sensing valve in the pressure fueling system

Question 12

What is the function of the remote fueling shutoff switches?

Answer 12

To control pressure fueling shutoff operation from the cockpit

Question 13

What are the normal indications on the fuel gauges with the standby fuel quantity gauge selected to “TEST”?

Answer 13

An amber 7000 lbs indication on each fuel gauge with the total fuel gauges reading an amber 14,000 lbs indication and flashing “LOW FUEL” message for approximately 30 seconds on the standby panel and “FUEL LEVEL LOW” on the CAS

Question 14

What is an acceptable source of fuel for the APU?

Answer 14

Either the left main or left alternate boost pump selected ON Either the right main or right alternate boost pump selected ON with the crossflow valve OPEN

Question 15

If both fuel boost pumps on one side were selected to OFF after engine start, what would be the resulting indication?

Answer 15

A red “FUEL PRESS LOW” CAS message

Question 16

What is the function of the crossflow valve?

Answer 16

• To supply fuel to both engines from one fuel tank, or
• Transfer fuel under pressure to an opposite fuel tank through the motive-flow ejector pumps

Question 17

What is the function of the intertank valve?

Answer 17

• Defuel the aircraft
• Balance fuel

Question 18

What is the meaning of the “CB” indication in the boost pump switches?

Answer 18

This indicates that a boost pump circuit breaker has tripped on the power distribution box (PDB)

Question 19

Where is the location of the fuel boost pump circuit breakers?

Answer 19

• On the power distribution box (PDB) in the forward radio rack,
• PRIMARY is on the ESS DC Bus and Alternate is on the Right Main DC Bus

Question 20

Fuel Tank Temperature Min

Answer 20

-40˚ C

Question 21

Fuel Tank Temperature Max

Answer 21

54˚ C and above

Question 22

Maximum Fuel Imbalance

Answer 22

2,000LBS @ 55,000# gross wt

400LBS @ 60,500# gross wt