ATA 28 Fuel

Question 1

What will happen when the TRANSFER SWITCH is set to “TO TANK 1”?

Answer 1

• Automatic start of TANK 2 AUX pump
• Illumination of TANK 2 AUX pump light
• Opening of the TRANSFER/REFUELING/DEFUELING SOV + valve open advisory light

Question 2

How can you start the FUEL AUXILIARY PUMP?

Answer 2

• Manually switching the pump - ON

- Operating the TRANSFER switch

Question 3

What is the purpose of the surge tank?

Answer 3

• Positive venting of air from the tank
• Pressurization of the tank
• Overflow control of fueling (via naca vents)

Question 4

What is the purpose of the collector tank?

Answer 4

Fuel goes directly to engine driven pump from here

The fuel tank collector bay (or tank), maintain a constant supply of fuel for the boost ejector pump and the auxiliary fuel pump.

Question 5

What is the purpose of the BOOST EJECTOR PUMP?

Answer 5

Fuel to each engine is fed from the collector tank and delivered to
the Hydromechanical Control Unit (HMU).

Boost ejectror pump:
The ejector pump draws fuel from the collector tank and delivers it to the main pump inlet continuously throughout the normal engine operating range.

Main pump:
Delivers the fuel directly to the HMU.

Question 6

What do we have to do if the “FUELING ON” caution light illuminates after the pressure refueling is completed?

Answer 6

Fuel guy forgot to set the REFULE/DEFUEL MASTER switch to OFF. We must physically set the switch to OFF.

Question 7

Maximum allowed imbalance between left and right tank is?

Answer 7

600 lbs/ 270 kg