12 - System: Fuel

Question 1

Fuel: At what fuel level does the fuel ligth illuminate and how much flight time do you have left at this time?

Answer 1

60 liter, 18 minutes.

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.3.1)

Question 2

Fuel: If one of the booster pumps fail can fuel return to the tank via the defective pump?

Answer 2

No, the oneway valves installed after the pumps prevents fuel from returning via the defective pump

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.3.2.)

Question 3

Fuel: If both of the booster pumps fail will the engine supply be affected?

Answer 3

No, the engine pump can still draw fuel from the tank. Follow Flight Manual instructions.

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.3.2)

Question 4

Fuel: What does it mean when the Fuel F lights illuminates?

Answer 4

That the pressure difference between input and output pressure is more than 206 mb, indicating an impending bypass.

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.3.3)

Question 5

Fuel: At what pressure difference does the bypass valve on the Fuel Filter open?

Answer 5

350 mb +/- 50 mb. This is not indicated in the cockpit and must be inspected visually

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.3.3)

Question 6

Fuel: If the fuel gauge fails will the fuel light still illuminate in case of low fuel?

Answer 6

Yes, the two systems are separate.

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.5)

Question 7

Fuel: Describe the fuels path through the system

Answer 7

1. Fuel Tank
2. Booster pumps
3. Oneway valve
4. A/F fuel filter
5. Fuel filter
6. Fuel Shut-off valve
7. Engine

(Instruction Manual - Basic 1 - Main Systems, Chapter 10, Paragraph 10.2)

Question 8

Fuel:

At what pressure difference does the bypass valve on the A/F fuel filter open?

Answer 8

App. 260 mb difference between input/output

(AFM Chapter 7.4 para. 2.2)

Question 9

Fuel:

At what pressure difference does the “A/F FILT” light illuminate?

Answer 9

When the pressure drops app. 60 mb from input to output.

(AFM Chapter 7.4 para. 3)

Question 10

Fuel:

At what pressure difference does the “FUEL F” light illuminate?

Answer 10

When the pressure drops app. 200 mb between input and output.

(AFM Chapter 7.4 para. 3)