Fuel

Question 1

Explain the meaning of an illuminated Main Tank Fuel Pump LOW PRESSURE light

Answer 1

• Fuel pump output pressure is low OR
• FUEL PUMP switch is OFF

Note: Two LOW PRESSURE lights illuminated in the same tank illuminate MASTER CAUTION and FUEL system annunciator lights

Note: One LOW PRESSURE light causes MASTER CAUTION and FUEL system annunciator lights to illuminate on a MASTER CAUTION recall.

Ok that follows the single/dual channel fault logic of the master caution system.

VOL 2/12.1.1

Question 2

Describe the logic of the blue crossfeed VALVE OPEN light

Answer 2

Bright blue:
- valve in transit or
- valve position and CROSSFEED selector disagree

Dim blue:
- Valve is open (and crossfeed valve is open)

Extinguished:
- valve is closed (and crossfeed valve closed)

VOL 2/ 12.1.1

Question 3

Describe the logic of the blue ENGINE VALVE CLOSED and SPAR VALVE CLOSED lights

Answer 3

Bright blue:
- valve in transit or
- valve position and engine start lever or engine fire warning swtich disagree

Dim blue:
- Valve is closed

Extinguished:
- valve is open

VOL 2/ 12.1.1

Question 4

Describe the meaning of an illuminated fuel FILTER BYPASS light

Answer 4

Impending fuel filter bypass due to contaminated filter

VOL 2/ 12.1.1

Question 5

Describe the meaning of a fuel quantity LOW alert

Answer 5

Displayed (amber) - fuel quantity less than 2000lbs in related main tank

Note: the fuel quantity digits on tank(s) with low fuel quantity turn AMBER too (when it shows less than 2.00 on each side)

VOL 2/ 12.1.3

Question 6

Describe the meaning of a fuel CONFIG alert

Answer 6

Displayed (amber):
- either engine running
- center fuel tank quantity greather than 1600lbs and both center fuel tank pumps producing low or no pressure (so they are turned off most likely)

Note: the quantity digits on the center tank fuel quantity indicator turn amber.

Note: the center fuel tank pumps being OFF can cause this!

VOL 2/ 12.1.3

Question 7

Describe the meaning of a fuel IMBAL alert

Answer 7

Displayed (amber):
- main tanks differ by more than 1000lbs (IN FLIGHT only?)
- displayed below main tank with lower fuel quantity
- displayed when airplane is on the ground or in the air
- inhibited by fuel LOW indication when both indications exist
- displayed until imbalance is reduced to 200lbs

Note: the fuel quantity digits on tank with lower fuel quantity turn amber

VOL 2/ 12.1.3

Question 8

Describe two ways to close the spar and engine fuel shutoff valves

Answer 8

• Place the engine start lever to CUTOFF
• Pull the engine Fire Warning Switch (handle)

VOL 2/ 7.2.4 & 8.2.2.2

Question 9

Explain how fuel is supplied to the engines with all pumps operating

Answer 9

• Center tank pumps produce higher pressure than main tank pumps. This ensures that center tank fuel is used to almost zero before main tank fuel.

Note: when main tank fuel pump pressure is low, each engine can draw fuel from its corresponding main tank through a suction feed line that bypasses the pumps

VOL 2/ 12.2.2.2

Question 10

What is the meaning of a fuel CONFIG alert?

select all that apply

Answer 10

This was a fucked up question.

• 3701-3771: Either engine is running, the center fuel tank quantity is greater than 1600lbs, and both center fuel tank pumps are producing low or no pressure (THE CENTER PUMPS BEING OFF CAN CAUSE THIS)
• 3772-3777: Either engine is running, the center fuel tank quantity is greater than 1600 lbs, and both center fuel tank pump switches are positioned OFF

ESV-SA: Fuel

Question 11

True or False:
A fuel FILTER BYPASS light indicates an impending fuel filter bypass due to a contaminated filter?

Answer 11

TRUE

ESV-SA: Fuel

Question 12

Which statement is true regarding a fuel quantity LOW alert?

Answer 12

A LOW alert illuminates AMBER when fuel quantity is less than 2000lbs in related main tank

ESV-SA: Fuel

Question 13

A fuel IMBAL alert will display if the main tanks differ by more than…

Answer 13

1000lbs in flight or on the ground

ESV-SA: Fuel

Question 14

A bright blue crossfeed VALVE OPEN light indicates the valve is..

select all that apply

Answer 14

• in transit
• closed and the selector is in the open position

ESV-SA: Fuel

Question 15

With fuel in all the tanks and all fuel pumps on, what is the normal fuel feed sequence?

Answer 15

Center tank to both engines until almost zero, then main tanks to their respective engine

ESV-SA: Fuel

Question 16

True or False:
Main tank fuel pump LOW PRESSURE lights will illuminate when output pressure is low

Answer 16

TRUE

ESV-SA: Fuel

Question 17

Illuminated BRIGHT blue ENG VALVE CLOSED and SPAR VALVE CLOSED lights indicate that…

select all that apply

Answer 17

• The valve position and engine start lever or engine fire warning switch disagree
• Related valves are in transit

Note: the related valves may be open but we need to know the position of the switch to know if that would cause the BRIGHT blue light or not

ESV-SA: Fuel

Question 18

How can the spar fuel shutoff valve be closed?

Answer 18

• Pulling the engine fire warning switch

Note: NOT the engine THRUST levers to idle - read the damn question. You CAN by moving the engine START levers to CUTOFF

Question 19

What will cause a fuel IMBAL alert?

Answer 19

• Main tanks differ by more than 1000lbs IN FLIGHT

Note: the incorrect answer on CBTs was: main tanks differ by more than 1000lbs on the ground

Check Your Knowledge- Fuel CBTs

Question 20

An extinguished crossfeed VALVE OPEN light indicates:

Answer 20

The crossfeed valve is closed

Check Your Knowledge- Fuel CBTs