Fuel System SY107

Question 1

How are the wing tanks refueled?

Answer 1

Pressure refueling or gravity fill

Question 2

How is fuel fed to the engine?

Answer 2

By a motive flow system (creating a pressure differential)

Question 3

What does the electric boost pump do?

Answer 3

Provide pressure in case is engine driven low pressure fuel pump failure.

Question 4

What does the flip-flop valve do?

Answer 4

Supplies fuel feed during negative G

Question 5

How many announciators for the fuel system are there?

Answer 5

6

Question 6

What are the names of the three integral tanks?

Answer 6

Left and right wing tank and collector tank

Question 7

What is the max capacity of the fuel tanks? What about if you use the primary refueling method?

Answer 7

1200 pounds/1100 pounds

Question 8

What’s the distribution of fuel when using primary fueling method?

Answer 8

530 lbs in each wing tank, 40 in central collector tank

Question 9

What is the primary refueling method called?

Answer 9

Single point pressure refueling

Question 10

If the collector tank is empty how will the fuel feed to the collector tank during refueling?

Answer 10

Gravity feed

Question 11

How long does it take to fill the tanks (using pressurization)?

Answer 11

3-5 minutes

Question 12

What controls the refueling shutoff?

Answer 12

The level control pilot valves

Question 13

How long does it take to defuel the aircraft?

Answer 13

5 minutes

Question 14

What is he secondary refueling method? And what is the fuel capacity using this method?

Answer 14

Over the wing gravity refueling. And 50 lbs more per tank (total of 1200 lbs)

Question 15

Is there an automatic shutoff function for over the wing gravity refueling?

Answer 15

No

Question 16

What does the electric boost pump do?

Answer 16

Provide fuel during initial startup. And it serves as a backup to the engine-driven low pressure fuel pump.

Question 17

What does the manifold valve do, and where is it located?

Answer 17

Connect the boost and primary pump in the front of the collector tank.

Question 18

If the fuel filter is restricted what then happens?

Answer 18

The fuel bypass is enabled.

Question 19

What are the two shutoff valves called?

Answer 19

Firewall shutoff valve and maintenance shutoff valve

Question 20

That does the low pressure fuel pump do?

Answer 20

Provide fuel to the high pressure fuel pump and then on to the FMU.

Question 21

What is the FMU?

Answer 21

Fuel Management Unit (controls fuel delivery to the engine)

Question 22

Where does excess fuel go?

Answer 22

To the collector tank through the purge line

Question 23

What senses fuel pressure in the motive flow line?

Answer 23

The 10 psi pressure switch?

Question 24

When will the FUEL PX light illuminate?

Answer 24

If fuel pressure drops below 10 psi and PCL is above the start ready position

Question 25

What drives the primary jet pump?

Answer 25

Fuel delivered by the motive flow line

Question 26

How many transfer jet pumps are there, where are they located and what do they do?

Answer 26

4, each corner of the inboard wing tanks, and ensure that the collector tank receives adequate fuel and pressurization.

Question 27

How does the primary jet pump and the transfer jet pumps operate

Answer 27

By Venturi flow

Question 28

How many fuel level probes are there?

Answer 28

7 (3 in each tank and 1 in collector tank)

Question 29

When will the fuel quantity indicators turn yellow?

Answer 29

150 lbs in either one tank.

Question 30

When will the fuel low announciators lights up?

Answer 30

Below 110 lbs in the respective tank

Question 31

When will the fuel balance annunciator illuminate?

Answer 31

More than 30 lbs imbalance for more than two minutes

Question 32

When will M FUEL BAL illuminate?

Answer 32

When fuel balance switch is not in auto

Question 33

What does the t-6 fuel system consist of?

Answer 33

Three integral fuel tanks