Fuel System

Question 1

What does turning the DC Fuel Pump knob to AUTO do?

Answer 1

Automatically commands the pump ON when:
- ENG 2 or APU is started, and;
- AC Fuel Pump 2 is not available

Question 2

Can the aircraft be refueled when there is no electrical power?

Answer 2

Yes, the pressure refuel/defuel panel is linked to HOT BATT BUS 2.

Question 3

Describe the collector tank.

Answer 3

Where the AC, DC, and Ejector pumps are located. This tank keeps these fuel pumps submerged.

Question 4

Describe the main tank.

Answer 4

Main storage area for fuel.

Question 5

Describe the purpose and use of the AC fuel pump (3 uses).

Answer 5

• Used to supply fuel during engine start.
• Serves as a backup to the main ejector pump.
• Supplies fuel to both engines from a single fuel tank during crossfeed

Question 6

Describe the surge tank.

Answer 6

Collects any fuel that may enter the vent during wing down and uncoordinated maneuvers.

Question 7

Describe the uses of the DC Fuel Pump (3 uses).

Answer 7

• Primarily used to supply fuel to the APU during start without AC power.
• Can supply fuel to ENG 2 during a start without AC power.
• Operative during an electrical emergency and can be used to start the APU or ENG 2.

Question 8

Describe what the Ejector Pump is and how it flows.

Answer 8

It is the primary pump used to transport fuel from the collector tank to the engine.

It has no moving parts. It relies on motive flow from the engine driven fuel pump.

Question 9

What is each integral tank divided into?

Answer 9

The surge, main, and collector tank.

Question 10

How do you manually close the engine fuel shutoff valve?

Answer 10

By pulling the engine fire handle.

Question 11

How many fuel shutoff valves are there?

Answer 11

Three.
- APU
- Engine
- Crossfeed

Question 12

How many scavenge pumps are there and what is their purpose?

Answer 12

Three scavenge pumps in each main tank to maintain the level in the collector tank.

Question 13

If you refuel with the engines running, can passengers be onboard?

Answer 13

No, only the crew may be onboard.

Question 14

What does selected XFEED LOW 1 do?

Answer 14

Opens the crossfeed valve and automatically activates the right AC fuel pump (AC PUMP 2), supplying fuel to both engines from the right wing tank.

Question 15

What does selecting XFEED LOW 2 do?

Answer 15

Opens the crossfeed valve and automatically activates the left AC fuel pump (AC PUMP 1), supplying fuel to both engines from the left wing tank.

Question 16

What is the maximum fuel capacity?

Answer 16

20,935 lbs

Question 17

What is the minimum fuel temperature limitation?

Answer 17

-37C

Question 18

What is the Skywest fuel balance limitation?

Answer 18

794 lbs

Question 19

What two things must be met if the aircraft is refueled with passengers on board?

Answer 19

• The flight crew must maintain contact with refueling personnel
• Engines must be off

Question 20

When AC pump 1 is AUTO, what is the logic? (3 things)

Answer 20

It turns the pump ON when:

• ENG 1 is starting, or
• XFEED selected LOW 2, or
• Main ejector pump fails

Question 21

When AC pump 2 is AUTO, what is the logic? (4 things)

Answer 21

Turns the pump ON when:

• ENG 2 is starting, or
• APU is starting or running without ENG 2 running, or
• XFEED selected LOW 1, or
• Main ejector pump 2 fails

Question 22

When do you declare “Emergency Fuel”?

Answer 22

When showing you will land with 30 minutes or less of fuel (1500 lbs).

Question 23

When do you declare “Minimum Fuel”?

Answer 23

When showing you will land with less than 45 minutes of fuel (2250 lbs).

Question 24

When do you need to check fuel after takeoff?

Answer 24

At the TOC and at least once every hour thereafer. Compare fuel onboard to the flight release and/or “how goes it” page from ACARS.

Question 25

When does an individual fuel tank quantity indication turn amber or red?

Answer 25

Amber: At or below 1320 lbs

Red: Below 660 lbs

Question 26

When does total fuel tank quantity indication turn amber or red?

Answer 26

Amber: At or below 2640 lbs

Red: Below 1320 lbs

Question 27

When is the APU fuel shutoff valve opened?

Answer 27

It is normally closed and only opens when the APU control knob is turned ON.

Question 28

When must the XFEED selector be switched to OFF?

Answer 28

During takeoffs and landings

Question 29

When will the FUEL IMBALANCE caution message populate?

Answer 29

When 800 lbs or more imbalance is detected.

Question 30

Where does the DC fuel pump draw fuel from?

Answer 30

The right tank.

Question 31

Where is fuel temperature reading taken from?

Answer 31

The left tank only.