Fuel

Question 1

What is the total fuel capacity?

Answer 1

5678 pounds or 2839 per tank.

Question 2

The main engine driven pump provides fuel to the MFC. What if this pump fails?

Answer 2

Engine power will be lost. The Aux Pumps cannot provide the pressure for the engine to remain running.

Question 3

The ECU (EEC) main function is to refine fuel scheduling. What if it fails?

Answer 3

Fuel schedule refining will be lost, torque will increase 8-10% on the affected engine. Also, HBOV and propeller underspeed protection will be lost.

Question 4

Three parts of the fuel tanks?

Answer 4

Main tank- Scavenge/Ejector pumps and swing check valves deliver from the main tank to collector tank.
Collector Bay- Fuel goes directly to engine driven pump from here.
Surge tank- Allows overflow through NACA ducts in case of overfueling. Also allows fuel tanks to pressurize during flight.

Question 5

Why can’t fuel be transferred if the Refuel/Defuel switch is left on?

Answer 5

The refuel/defuel system uses the aux pumps and transfer system for fueling.

Question 6

Fuel Low Caution light means?

Answer 6

Low Fuel caution means less than 130 lbs. in the collector bay (12 minutes)

Question 6

Is the APU allowed to be on during fueling?

Answer 6

Yes, as long as it is single point. Overwing fueling requires the APU to be shutdown.