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21 Cards in this Set

  • Front
  • Back
Name the five CRJ-200 fuel tanks
L/R Wing Tanks
L/R Collection Tanks
Center Tank
How are the fuel tanks vented?
NACA scoops - semi-triangular recessed fuel vents with minimal drag, which provide slight fuel tank pressurization via ram air in flight
What is used to provide the fuel system computer with fuel quantity information?
Probes which measure temperature and quantity (computer uses given volume at given temperature to calculate weight of fuel).
How may fuel level be manually checked on the ground?
What type of ejector pumps are used to transfer fuel from the main tanks to the collector tanks?
Scavenge ejectors (wing collectors) in line with check valves
What maintains fuel symmetry between the main tanks?
Computer detects discrepancy between the fuel weights of the side tanks and runs a crossflow pump to equalize when the weights differ by 200lbs or more. Gravity crossflow may be used to manually equalize tank levels. Should they differ by 800lbs or more, FUEL IMBALANCE will display on EICAS.
How are the collector tanks kept full?
Gravity lines from wing tanks, scavenger ejectors
What is used to back up the main ejectors?
DC boost pumps
From what source is APU fuel feed applied?
APU XFLOW pump or through L/R Cross Flow SOV from wing tanks
In case of a negative “G” condition or a transfer/APU pump failure, how will fuel be supplied to the APU?
Negative G Relief Valve actuates and is pressurized by right collector tank main ejector pump and actuated by pressure and by spring action (open and closed, respectively).
How is pressure refueling and suction defueling accomplished and how is it controlled?
An adapter from the fuel truck is connected and pressurized by the truck’s own fuel pump. Fuel levels are displayed on fuel panel. Each tank may be filled individually or one may be filled then XFLOW pumped to others. Suction fueling is a reversed version of the same process and may require quarantine of the removed fuel.
What is used to prevent overpressure during pressure refueling?
High Level Sensors detect maximum fuel quantity/pressure and shut off refuel valve, which allows NACA vents to catch up.
What fuel system information is displayed on the EICAS Primary Page?
fuel levels per tank, fuel flow in PPH, cautionary messages if applicable
How many magnetic level indicators are there and where are they located?
5 – two per wing tank under wing, one installed in main tank
What is the purpose of the fuel drain valves that are installed at the lowest point of each tank?
Removal of water/contaminants from fuel tank by gravity sump.
Define: IRS
Inertial Reference System
Define: PBA
Push-Button Anunciator (alternative spelling of Enunciator used by Bombardier)
Define: MLI
Magnetic (fuel) Level Indicator
Define: NACA Vent
Triangular scoop shaped vent used to provide ram air and air flow for wing tanks
What is the fuel capacity of the center and wing tanks, and what is the total capacity of the craft during PRESSURE refuel?
Left and Right main tanks - 4,760 lbs
Center tank - 4,998 lbs
TOTAL - 14,518 lbs
What is the fuel capacity of the center and wing tanks and what is the total capacity of the craft during GRAVITY refuel?
Left and Right main tanks - 4,488 lbs (94.2% full)
Center tank - 4,930 lbs (98.6% full)
TOTAL - 13,906 lbs (95.7% full)