Fuel System

Question 1

What fuel pressure indication is on the MFD when booster pump is OFF?

Answer 1

NO indication

Question 2

What do the Pressure Tranducers do?

Answer 2

Monitor pressure on each fuel feeding line and transmit the information to the MAU’s

Question 3

Regarding the pressure tranducers what happens if the SOV is OFF?

Answer 3

No pressure signal is sent by the pressure tranducers - because they come after the SOV in the system

Question 4

What is the TOTAL fuel capacity of the AW139? with and without AUX tank

Answer 4

1270 KG (1588 litres), 1670 KG (2088 litres)

Question 5

What is the capacity of the Auxillary fuel tank?

Answer 5

400 KG (500 litres)

Question 6

At what weight of fuel will cross-filling begin?

Answer 6

At 228 KG in each tank

Question 7

At what fuel level does the FUEL LOW warning become activated?

Answer 7

92 KG (per tank)

Question 8

If secondary fuel probe is in failure will the LOW LEVEL warning still actuate?

Answer 8

YES. The 92 KG sensor is independent from the second fuel probe

Question 9

Do you lose the FUEL LOW caution (below 92 kg level per tank) if the FCU fails?

Answer 9

NO

Question 10

On the fuel section of the default Power Plant page what pressure does the fuel reach for the indicator to be in the Amber?

Answer 10

0.5 bar

Question 11

What does FCU mean?

Answer 11

Fuel Computer Unit

Question 12

The FCU compensates the fuel quantity indication for roll attitude between what limits?

Answer 12

+/- 5 degrees

Question 13

What four things are provided on the SUMP plates?

Answer 13

1. Fuel Booster Pump 2. Secondary fuel quantity probe with low level sensor 3. Fuel Drain Valve 4. Water Drain Valve

Question 14

In the case of fire, the SOV 1 is automatically closed when what action is carried out?

Answer 14

When the ENG 1 guarded push button on the FIRE EXTING panel is pressed

Question 15

In the case of fire, the SOV 2 is automatically closed when what action is carried out?

Answer 15

When the ENG 2 guarded push button on the FIRE EXTING panel is pressed

Question 16

What does it mean when one of the readouts on the Fuel Quantity gauge turns GREY?

Answer 16

That tank can NO LONGER supply fuel because the boost pumpt is inop and the fuel level is below the L line of 228 kg

Question 17

How can you use the unusable fuel in the tank indicated with the GREY fuel quantity value?

Answer 17

CLOSE the X-FEED

Question 18

What Ng is required for the Fuel Flow data to be displayed on the MFD?

Answer 18

> 62% Ng

Question 19

Where is the data for the Fuel Flow computations derived?

Answer 19

EEC, ADS (TAS)

Question 20

Where can FUEL test be carried out?

Answer 20

ONLY on the GROUND

Question 21

What does “1(2) FUEL PUMP” Caution mean?

Answer 21

Associated fuel pressure low (Less than 0.6 bar), Goes out when pressure above 0.7 bar

Question 22

What does “1-2 FUEL PUMP” Caution mean?

Answer 22

Fuel pressure low (less than 0.6 bar) in both fuel systems

Question 23

At What fuel amount does the fuel quantity readout turn grey?

Answer 23

• XFEED -> open - 1(2) fuel pump caution active AND - 1(2) fuel quantity < 228 kg

Question 24

What is the design purpose for the 228KG capacity that can’t be transferred?

Answer 24

Each tank retains a maximum of about 228 kg that cannot be transferred to the other tank: this permits a suitable amount of fuel to be saved in case of rupture of one of the tanks.