A220- Fuel

Question 1

What is the purpose of the Surge tanks located outboard of both main tanks?

Answer 1

To provide venting space and flow back to the main tanks

Question 2

If the left engine is running, where does the APU receive fuel from?

Answer 2

From the left collector tank

Question 3

If the left engine is NOT running, where does the APU receive fuel from?

Answer 3

If the left engine is not running, the APU Electronic Control Unit (ECU) can activate either the left or
the right AC boost pump to supply fuel to the APU.

Question 4

If one boost pump is selected _______, fuel from that side will feed both engines

Answer 4

ON

Question 5

When the fuel quantity of the main tank drops to approximately _______% of full, fuel from
the center tank is automatically transferred to the main tanks by transfer ejector pumps

Answer 5

87%

Question 6

What fuel imbalance between the L/R main tanks would cause a FUEL IMBALANCE message to illuminate on the EICAS.

Answer 6

800 lbs. or greater

Question 7

When the L/R BOOST PUMP rotary switches are in AUTO and a ________ lbs. imbalance between the main tanks is sensed, the AC boost pump of the fullest tank comes on automatically. Both engines receive fuel directly from the fullest tank until fuel quantities are
within ________ lbs. of each other.

Answer 7

400 lbs

100 lbs.