757 Fuel

Question 1

Fuel config .when does this come on?

Answer 1

Imbalance 800 kgs
Low quantity 1000 kgs
Centre tank pumps off but fuel in centre tank more than 600 kgs

Question 2

What pressure do the centre tank pumps have compared to wing tanks?

Answer 2

Twice the pressure therefore they override and centre tank fuel is used first.

Question 3

Can centre tank fuel be used with no ac power?

Answer 3

No it is trapped and cannot be used.

Question 4

HDG powers which fuel pump?

Answer 4

Left centre tank fuel pump.

Question 5

Can fuel be used out of wing tanks if ac power failure?

Answer 5

Yes thru bypass valves in Wing tanks. Engine driven pumps suck via these.

Question 6

What does the valve light mean on the xfeed?

Answer 6

Does not agree with switch position.

Question 7

When does the fuel left in the centre tank get scavenged

Answer 7

Scavenge system works when the wing tanks are half full.

Question 8

What fuel cannot be used?

Answer 8

JP 4/ jet B fuel

Question 9

Fuel temp is measured from which tank?

Answer 9

Right main.

Question 10

Minimum fuel temp?

Answer 10

-45c or 3c above freezing

Question 11

Max fuel temp?

Answer 11

49c

Question 12

Blank indication on fuel quantity means?

Answer 12

Failure of the sensing system or no power .

Question 13

Where does the fuel from surge tank go?

Answer 13

Returns to respective tank

Question 14

Fuel capacity

Answer 14

6.6 and 21 tonne