CRJ 900 Systems Fuel Flashcards
Where is the aircraft fuel stored?
In the two main wing tanks and one center tank
How are the fuel tanks normally vented?
The tanks are vented to atmosphere by 2 NACA scoop vents
How are fuel system faults annunciated?
Switch lights on the overhead panel and messages on EICAS
What is used to provide the fuel system computer with fuel quantity information?
Six fuel quantity probes with compensator units in each of the main tanks and three probes in the center tank.
What type of ejector pumps are used to move fuel from the main tanks to the collector tanks?
Scavenge ejectors
What maintains fuel symmetry between the main tanks?
Automatically or manually controlled by the XFLOW pump
How are the collector tanks kept full?
Gravity feed lines and scavenge ejectors
What is used to back up the main ejectors?
Two electric boost pumps
Once the DC Boost pumps are armed, they…
- Are energized during engine starting
- Can feed fuel to either engine from one collector tank
- Back up the main ejector pumps
From what source is the APU fuel feed supplied?
From the left collector tank via APU fuel pump
Where is the bulk fuel temperature taken?
Right main tank
How is pressure refueling and suction de-fueling accomplished and how is it controlled?
Accomplished though the single point refuel/de-fuel adapter. Controlled from the refuel/de-fuel control panel
If a fuel asymmetry condition exists between main tanks, what visual amber CAUTION message is presented on EICAS?
FUEL IMBALANCE
What fuel system information is displayed on the EICAS primary page?
Individual tank quantities, total quantity, fuel flow per engine
For automatic pressure refueling, what does the refuel/de-fuel control panel permit?
1 Pre selection of fuel quantity desired
2 Built in test (BITE) feature
3. Refuel/de-fuel shut-off-valves to close automatically if the maximum fuel level is reached
