SF340 Fuel System

  1. What is the Maximum combined fuel on the Saab 340? 9-1
    (5690lbs) (850 gals)
  2. What is the Maximum fuel per wing? 9-1
    (2845lbs) (425 gals)
  3. Does the Saab 340 have negative G fuel capabilities? 9-1
    Yes, through the negative g canister in the hopper tank
  4. What does an illuminated LOW LEVEL indicate? 9-3
    Less than 300 lbs ± 70 lbs in the respective tank
  5. Does the Fuel quantity indicator show usable or total fuel? 9-3
  6. How many ways are there to check fuel quantity and what are they? 9-3
    3: Fuel quantity indicators, Magnetic sticks, Fuel panel gauges
  7. At what quantity do the magnetic fuel quantity indicators become useful? 9-4
    When fuel levels are below 1100 lbs
  8. Where are the Standby pressure pumps located? 9-5
    In the hopper tank
  9. What does an illuminated MAIN PUMP light indicate? 9-10
    A failure of the main pump
  10. When is the STBY PUMP activated? 9-10
    MAIN PUMP failure
  11. What does an illuminated green STBY PRESS light indicate? 9-10
    Standby pressure is detected at a main pump inlet
  12. Can the right pump supply fuel to the left engine? 9-10
    Yes, through the cross feed valve
  13. What powers the Standby pressure pumps? 9-10
    Respective Battery Bus
  14. What powers the Main Pumps? 9-10
    Engine accessory gear box
  15. What supplies fuel to the engine during engine start? 9-10
    Standby pressure pump
  16. When does the automatic activation of the STBY PRESS pump not occur with a decrease in Main pump pressure? 9-10
    With the condition lever in fuel off
  17. How many fuel pumps are on the Saab? 9-10
    6, 2 main pumps, 2 standby pumps and 2 high pressure pumps in the HMU
  18. What lights on the overhead panel do not trigger a CWP FUEL light? 9-11
    • X FEED ON
    • CONN VLV
  19. How is the Fuel Shut Off valve closed? 9-11
    Pulling of the Fire Handle
  20. What is indicated by an illuminated VALVE CLOSED light? 9-11
    Fuel shut off valve is closed
  21. What is indicated by an illuminated XFEED ON light? 9-11
    The cross feed valve is open
  22. What is indicated by an illuminated CONN VALVE light? 9-11
    The fuel connect valve is open
  23. What is the purpose of the fuel connect valve? 9-11
    To balance fuel by gravity transfer
  24. What is indicated by an illuminated FUEL FILTER light? 9-11
    An impending bypass of the Fuel filter (>18 psid)
  25. What is the maximum pressure for single point refueling? 9-12
    50 psi
  26. What does an illuminated FUELING light indicate? 9-12
    • The fuel panel switch is selected ON
    • The defueling valve is open
  27. Where does the fueling panel get power from? 9-12
    Right Hot battery bus
  28. If an automatic level control circuit fails and causes an overfill, what happens? 9-12
    An overfill sensor in each outboard tank closes the related valve and illuminates the OVERFULL light to come on
  29. To achieve maximum capacity what fueling procedure is used? 9-12
    Over wing fueling
  30. How is defueling accomplished? 9-13
    • Pressure defueling uses Standby pumps to pump fuel from the aircraft
    • Suction defueling requires the fuel truck to draw fuel from the aircraft
Card Set
SF340 Fuel System
Colgan Air Saab 340 Chapter 9 - Fuel System