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DHC-6-300 Fuel system

  1. How many Fuel Cells?
    8 fuel cells - 4 FWD, 4 AFT
  2. How many fuel tanks?
    2,  1 FWD, 1 AFT
  3. Where are the fuel cells vented too?
    All cells are vented to both wings.
  4. Where are the fuel vents located?
    2 fuel vents, 1 under each wing.
  5. Which tanks go to which engine?
    • FWD tank - Right engine.
    • AFT tank - Left engine.
  6. Fuel Quantity
    • Total - 383
    • FWD - 183
    • AFT - 200

    • Useable - 380
    • FWD - 182
    • AFT - 198
  7. When do the caution lights turn on & how much fuel / time remaining?
    • 110 AFT - 17 minutes
    • 75 FWD - 12 minutes
  8. Explain the Oil to Fuel Heater
    Purpose: Warms fuel to prevent ice crystals.

    Oil passes over heating shroud located next to engine.
  9. Fuel Nozzles
    14 fuel nozzles total per engine

    10 Primary

    4 Seconfary
  10. What PSI is the engine driven fuel pump?
    600 PSI
  11. PSI for boost pumps 1 & 2
    40 PSI
  12. When does the # 2 boost pump come on?
    • 1. When the # 1 boost pump fails. (pressure drops below 2 PSI.)
    • 2. When crossfeed is selected from that tank to the other tank.
    • 3. When the # 2 pump is selected on.
    • 4. When in test mode.
  13. What is happening when the crossfeed is selected?
    • The # 2 boost pump comes on in the SELECTED tank.
    • Both boost pumps in the tank NOT selected turn OFF.
  14. What electrical bus does the boost pumps run off of?
    • Pump # 1 - Left 28v DC bus
    • Pump # 2 - Right 28v DC bus
  15. How does the fuel quantity probe work?
    Fuel quantity probes are in all cells.  The fuel measuring system takes an average of all cells in each seperate tank.

    It runs off of AC power - 115 v
  16. Automatic change over system
    The # 2 boost pump turns on automatically when the # 1 goes below 2 PSI.
  17. Fuel X-feed receives its power from - 
    Right DC bus
  18. Filler cells
    Cells 1 & 7
  19. Collector Cells
    Cells 4 & 5

    Collector cells are the last cells to drain in the fuel system.  They contain both boost pumps and the circuit for the fuel low level light.
Author
cade_702
ID
167067
Card Set
DHC-6-300 Fuel system
Description
Fuel system
Updated

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