CRJ200 Fuel System Demo
This System Simulation is for the fuel system of the Bombardier CRJ200 aircraft. This is the most complex of the simulations; a component-to-component interaction between multiple systems.
This simulation is about 10 times more complex than the previous examples. The complexity of is due to:
Please read and/or print the simulation instructions prior to launching it.
In this example, the Fuel Synoptic page simply reflects the condition of the fuel system diagram; in other words, it works just like the real aircraft. When a valve opens, the valve in the diagram will drive the valve on the Fuel Synoptic page. This example uses settings that can determine the parameters of the system. These settings would typically be used in a maintenance training situation, but they can be used for pilot training as well.
Prior to launching the demo, please make sure that the settings below are displayed in green:
To launch the demo click Here
- In the bottom, right hand corner of the page, there’s a settings tab. Click on it so that you can see all the possible settings.
- Click on "Fuel" in the settings tab.
- Click once on the two boost pump switches (top left and top right pushbuttons of the fuel control panel). Nothing will happen because the action of selecting the IN position of the boost pump switch ARMS the pump for operation. On the CRJ200, the boost pump operates automatically when an engine is starting, or if the engine is running, the boost pump will operate if there is a low pressure condition in the feed manifold.
- You can simulate the starting of the number one engine by clicking on the No1 Engine Starting radio button. This will start the #1 boost pump. You'll notice that the ON light will illuminate to indicate that the pump is running. This on light is actually driven by the boost pump in the system diagram.
- You can simulate the number 1 engine running by clicking on the No 1 Engine Running radio button. The boost pump will continue to operate because there is low fuel feed pressure on the right side.
- Repeat steps 4, but using the No 2 Engine Starting radio button. This will start the #2 boost pump.
- Select the #2 engine running radio button. Both boost pump will stop running since the transfer ejectors are now handling the feed of the fuel and the boost pumps will go to standby.
- We'll now simulate a drop of manifold pressure. In the settings panel, slide the Fuel Feed Line Pressure slider to the left (towards zero). This will cause both boost pumps to start operating, and the "ON" lights will illuminate.
- Slide the manifold pressure to the right. Above 10, both boost pumps will stop operating.
- Using the top slider (Bulk fuel temperature), slide it all the way to the left. This will cause the fuel temperature (left side of the fuel synoptic page) to turn amber when the fuel temperature in the left tank is below -50. A single chime will sound and the BULK FUEL TEMP EICAS message will appear. You'll also notice that both Master Caution lights will illuminate.
- You can extinguish the master caution lights by pressing on either master Caution light.
- Take the bulk fuel temperature slider, and slide it all the way to the right. This will cause the BULK FUEL TEMP EICAS message to disappear. If you didn't extinguish the master Caution light, the light will go out automatically. Since the bulk fuel temperature is now above -50, the bulk fuel temperature will be displayed in green again.
- Take the Left Fuel Feed Temperature slider and slide it to the left. When the fuel feed temperature goes below 5 degrees, the fuel feed temperature on the Fuel Synoptic page will turn amber (the box before the engine), both master caution lights will illuminate, the L FUEL LO TEMP EICAS message will be displayed on the EICAS, and a single chime will sound.
- You can repeat the experiment with the Right Fuel Feed Temperature slider.
- In fact, you can play with a combination of 12, 13, and 14 above to see how the EICAS messages stack up. Like most glass cockpits, the most recent message appears at the top of the stack. If any condition is removed, the associated EICAS message will be automatically removed.
- Maybe you've noticed, but since the engines are running, the fuel used counter is counting up. If there is fuel in the center tank, that tank quantity will decrease first. After it's empty (you can simulate that by sliding the center tank volume slider all the way to the left), the fuel will start feeding from the left and right tanks.
- If you place the center tank volume all the way to the left, you’ll notice that the center tank fuel quantity indication is displayed in white. It's in white if the center tank quantity is less than 10 pounds. It's green otherwise.
- Take the left tank fuel volume slider, and slide it to the left until the difference between the left tank and the right tank is greater than 900. This will result in:
* A single chime will sound.
* The FUEL IMBALANCE EICAS message will appear.
* Both Master Caution lights will illuminate.
* The left and right fuel quantities will be indicated in amber.
* The APU pump will start automatically on the system diagram (and it will be reflected on the Fuel synoptic page) and the left crossflow valve will open on the system diagram (reflected on the Fuel Synoptic page) and fuel will be fed into the left tank (drawn from both the left and right tanks). Note: in the automatic mode, the fuel transfer starts automatically when the fuel imbalance exceeds 200 pounds.
* The left crossflow valve ON light will illuminate to indicate that fuel is being transferred automatically into the left tank.
- Slide the left fuel tank volume slider until the quantity is pretty close to the right tank fuel volume. The fuel transfer will continue until the left tank quantity (the one with the initial low quantity) exceeds the right tank by 50 pounds. At that point, the APU fuel pump will stop and the crossflow valve will automatically close.
- If you place both left and right fuel tank sliders to the point where the associated fuel tank quantity.
One caveat on the CRJ200 fuel system, we used the standard CRJ200 manual to create this interactive system. Unfortunately, Bombardier doesn't produce the most detailed manuals, so some of the interactions are best guesses on our part. If you ask us to build an interactive cockpit for your organization, we'll be asking to borrow a maintenance manual since these manuals are typically more detailed than the pilot one.