Fuel System

Question 1

Where are the Master fuel quantity indicators located?

Answer 1

Cockpit

Question 2

What is the indicating system powered by?

Answer 2

28VDC

Question 3

In the event of a power failure what will the fuel indicators display?

Answer 3

Zero

Question 4

When will the TANK FUEL LOW caution light illuminate?

Answer 4

Less than 130lbs in the collector bay.

Question 5

How many magnasticks are in each main tank?

Answer 5

2

Question 6

What is the total usable fuel in the main tanks?

Answer 6

5678lbs

Question 7

What is the maximum imbalance permitted in the main tanks?

Answer 7

600lbs

Question 8

When does the ENG FUEL PRESS caution light illuminate?

Answer 8

Fuel boost pressure to engine inlet below 5.5PSI

Question 9

What does the green advisory light adjacent to the switch illuminate in response to?

Answer 9

The pump is providing pressure.

Question 10

What are the auxiliary pumps powered by?

Answer 10

Variable AC

Question 11

What drives the engine driven high pressure fuel pump?

Answer 11

Engine accessory gearbox.

Question 12

Above 40% engine speed the high pressure pump output to the MFC exceeds engine requirements. What is the excess used for?

Answer 12

Motive flow from the ejector pumps.

Question 13

What is the maximum refuelling pressure?

Answer 13

50 PSI

Question 14

What does the FUELLING ON caution light indicate?

Answer 14

The master REFUEL or DEFUEL switch has been left on.

Question 15

If the FUELLING ON caution light is illuminated, what is inhibited?

Answer 15

Fuel transfer.

Question 16

Is over wing refuelling permitted?

Answer 16

No - OM requirement.

Question 17

When transferring fuel, which pump provides motive flow?

Answer 17

The donor tank

Question 18

What is the useable capacity of the Auxilliary fuel system?

Answer 18

4566lbs

Question 19

Where is fuel tank temperature measured?

Answer 19

Fuel tank temperature is measured from the left collector bay. The PROB is submersed in the fuel itself.

Question 20

What does the fuel scavenge system achieve?

Answer 20

Fuel tank scavenging takes place using ejector pumps to keep the collector bays full, thus ensuring that the engine feed boost ejector pumps do not run dry regardless of aircraft attitude.

Question 21

Where does motive flow fuel required for the scavenge system come from?

Answer 21

High pressure return fuel from the MFC

Question 22

What is the purpose of the AUX PUMPS?

Answer 22

A backup source of fuel boost pressure.

Question 23

Under what conditions will aux pump (s) be on?

Answer 23

Aux pump switch is on, transferring fuel & when de-fuelling.

Question 24

What does an ENGINE FUEL PRESS caution light tell you?

Answer 24

The engine driven pump inlet boost pressure drops below a predetermined value.

Question 25

How does the fuel heating system work?

Answer 25

Fuel is heated by hot engine lubricating oil and is then filtered.

Question 26

Is it possible for unfiltered fuel to enter an engine?

Answer 26

Yes, if it is the FUEL FLTR BYPASS caution light illuminates.

Question 27

What happens to the cockpit fuel QTY indicators when the QTY TEST button is pressed?

Answer 27

The fuel gauge pointers increase to full scale.

Question 28

What happens if electrical power to a cockpit fuel gauge is lost?

Answer 28

The fuel gauge indicator drops to a position below zero

Question 29

What happens if electrical power fails during refuelling?

Answer 29

If power failure is experienced during refueling, the associated control valve closes.

Question 30

How do you know if the refuel / defuel access panel door has been left open?

Answer 30

You don’t know.