Legacy 500 Fuel RKA Questions

Question 1

When must the FUEL XFEED knob be set to OFF?

Answer 1

• For takeoff, go-around and landing flight phases

(AOM 9-10-30 & AOM 2-36)

Question 2

Which MFD page provides a visual representation of the fuel system operation and parameters?

Answer 2

• The FUEL synoptic page {AOM 9-10-30)

Question 3

What color does the total and individual tank quantities and fuel temperature indications indicate when in the normal operating range?

Answer 3

• Green (AOM 9-10-30)

Question 4

When the total fuel quantity is displayed in RED, which aural warning is played twice?

Answer 4

• “FUEL”. (AOM 9-10-30)

Question 5

Can fuel be transferred from one wing to another?

Answer 5

• No (AOM 9-10-50)

Question 6

How does the crossfeed valve allow corrections in the event of a fuel load imbalance?

Answer 6

• It allows both engines and/or the APU to be fed by one tank (AOM 9-10-50)

Question 7

Which CAS message is displayed on the EICAS when the difference between the current and expected fuel quantities is higher than 880 lb (400 kg) for 5 minutes?

Answer 7

• The amber FUEL LEAK SUSPECTED CAS (AOM 9-10-50)

Question 8

How many fuel pumps does each fuel tank have?

Answer 8

• Two DC fuel pumps (main (A) and backup (B)) and two scavenge pumps
  (AOM 9-10 50)

Question 9

What controls the main (A) pump when the fuel pump is in the AUTO position?

Answer 9

• The engine ECU (AOM 9-10-50)

Question 10

What controls the backup (B) pump when the fuel pump is in the AUTO position?

Answer 10

• The FCU (AOM 9-10-50)

Question 11

List the **Four **times when the backup (B) pump will be automatically commanded to ON when the fuel pump is in the AUTO position:

Answer 11

1. During Engine Start
2. APU Start or Run,
3. Fuel Low-Pressure Detection
4. When the Main (A) Pump Fails
   (AOM 9-10-50)

Question 12

When will the amber FUEL WING IMBALANCE CAS message be displayed on the EICAS?

Answer 12

• When the Fuel Imbalance between tanks is higher than 510 lb
  (230 kg)
  (AOM 9-10 SO)

Question 13

Where is the pressure refueling point and REFUELING/DEFUELING control panel located at?

Answer 13

• In the forward portion of the right wing, next to fuselage

(AOM 9-10-50)

Question 14

How long does the system pre-check on the REFUELING/DEFUELING panel take to verify fuel system operation?

Answer 14

Approximately 10 seconds (AOM 9-10-50)

Question 15

Which switch located on the REFUELING/DEFUELING control panel enables pressurized refueling to be performed with the airplane energized by either the APU/GPU or batteries power?

Answer 15

• The POWER SELECTION switch (AOM 9-10-50)

Question 16

What should happen if the STOP REFUEL is displayed on the REFUELING/DEFUELING control panel during the refueling process?

Answer 16

Fueling process shall be halted manually by the operator by moving the REFUELING switch to the OFF position (AOM 9-10-50)

Question 17

May the tanks be refueled using the gravity refuel port on the top of each wing?

Answer 17

• Yes (AOM 9-10-50)

Question 18

What are the two different methods that the airplane can be defueled?

Answer 18

• By Suction and/or Pressure (AOM 9-10-50)

Question 19

What is the total fuel capacity?

For Praetor 500 and Praetor 600

Answer 19

• Praetor 500
  13,140 lbs (AOM 2-36)
• Praetor 600
  16,262 lb (pressure) (AOM 2-36)

Question 20

What is the total usable fuel capacity?

For Praetor 500 and Praetor 600

Answer 20

Praetor 500
13,050 lbs

Praetor 600
Usable Pressure - 16,136 lbs
Usable Gravity - 15,920 lbs

Question 21

What is the maximum fuel tank temperature for takeoff?

Answer 21

52°C (AOM 2-36)

Question 22

Praetor 600 - What is the Total Fuel Capacity
for both the FWD Tank and Ventral Tank.

Answer 22

3118 lbs (Capacity Pressure)

(AOM 2-36)

Question 23

Praetor 600 - What is the Total Fuel Useable Fuel
for both the FWD Tank and Ventral Tank.

Answer 23

3086 lbs (Useable Pressure)
2870 lbs (Useable Gravity)

(AOM 2-36)