Fuel

Question 1

What would cause a CONFIG indication on the FUEL QUANTITY display?

Answer 1

More than 1600 lbs of fuel in the center tank and the Center Tank pumps are OFF.

Question 2

What would cause this indication?

Answer 2

Fuel Imbalance is greater than 1000lbs for 60 seconds.

Question 3

What would cause this indication?

Answer 3

Tank quantity lower than 2000lbs for more than 30 seconds.

Question 4

When does a INSUFFICIENT FUEL annunciation display?

Answer 4

Less than 2000 lbs is predicted at the destination.

Question 5

What is the normal fuel rate per hour approximately?

Answer 5

6000#

100# per minute

Question 6

How many miles per minute?

Answer 6

5

Question 7

Should AC power fail the center tank fuel pumps are rendered inoperable. Is fuel from the center and main tanks still usable?

Answer 7

Center - No the fuel in the center tanks cannot be used.
Main - Yes, the main tanks can be vacuum fed.

Note; this is why the process is to use center fuel first.

Question 8

The USING RESERVE FUEL message is displayed on the scratchpad when? Is it different for the NG/MAX?

Answer 8

Fuel at destination is projected to be less than the RESERVES fuel on the PERF INIT page.

The MAX displays both below the fuel display and the scratchpad.

Question 9

An INSUFFICIENT FUEL message appears when?

Answer 9

Less than 2000 lbs of fuel is predicted to be present at the destination.

NG: Scratchpad only
MAX: Below fuel display and scratchpad

Question 10

A FUEL DISAGREE, only available on the MAX, displays when?

Answer 10

FMC determines a difference between calculated and totalizer values for more than 5 continuous minutes.

Question 11

A FUEL FLOW indication means? MAX ONLY

Answer 11

A difference between actual and FMC expected fuel rates exceed the threshold for 5 continuous minutes.

Question 12

EXTRA INFO: if any fuel remains in the center tanks after the center fuel pumps are turned off, the residual fuel will be moved to the number 1 tank by a scavenge pump after the No.1 Main tank is at less than 4500lb qty.