GoJet CRJ700 Fuel SyStem

Question 1

If low fuel is detected in the left engine fuel feed line, which boost pump activates

Answer 1

Left and Right both come on.

Question 2

How do you manually transfer fuel?

Answer 2

Select XFLOW AUTO OVERRIDE to MAN and then select the XFLOW switchlight for the low side.

Question 3

What is the maximum fuel imbalance allowed for takeoff and in flight, respectively?

Answer 3

300 lbs/800 lbs

Question 4

What maintains fuel balance between the main tanks?

Answer 4

It is automatically controlled by a bi-directional crossflow pump.

Question 5

The bi-directional XFLOW pump turns on and auto XFLOW begins when the fuel imbalance reached how many pounds?

Answer 5

200 pounds

Question 6

How does center tank fuel arrive at the engine/APU

Answer 6

Transfer ejectors send it to the main tanks. Scavenge ejectors send it to the collector tanks. Main ejectors or boost pumps send it to the engines/APU.

Question 7

All fuel tanks can be serviced by utilizing the overwing filler caps.

Answer 7

FALSE.

Question 8

Powered crossflow can be used for takeoff if desired, but gravity crossflow cannot

Answer 8

False. Neither can be on for takeoff.

Question 9

When will the main tank fuel quantity indications on ED2 and the fuel synoptic page turn amber?

Answer 9

Either main tank is less than 600 lbs.
Total fuel is less than 1200 lbs.
Fuel imbalance exceeds 800 lbs.

Question 10

If the bi-directional XFLOW pump fails to turn on when the fuel imbalance reaches 200 lbs, the pilot must select gravity XFLOW to remedy the situation.

Answer 10

FALSE. Can use MAN XFLOW as well.

Question 11

If there is a failure of motive flow, there is no way to get fuel into the collector tanks

Answer 11

FALSE. Gravity feed lines will keep the collector tanks full.

Question 12

The minimum fuel temperature at the engine prior to takeoff is _______. Minimum bulk fuel is either____ or _____depending on the fuel being used.

Answer 12

+5 deg C

-30 or -40 deg C.

Question 13

How are the fuel tanks vented?

Answer 13

The tanks are vented to atmosphere by two NACA scoop vents on the underside of the wings.

Question 14

What is used to back up the main ejectors to supply fuel to the engines?

Answer 14

Two electric boost pumps

Question 15

If a significant (more than 800 lb) imbalance condition exists between the main tanks, what message will appear on the EICAS?

Answer 15

FUEL IMBALANCE