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Reference material - https://www.smartcockpit.com/docs/CL605-FUEL_SYSTEM.pdf Page: 16 Fuel tanks are expected to be within 400 lbs / 181 kgs of each other on taxi / takeoff / landing OR 800 lbs / 362 kgs during flight, to avoid Fuel Imbalance EICAS message. First, orient yourself on the overhead panel, we'll be working in the 2nd row (or middle row) of the FUEL panel area. (Fuel.PNG) All three of these buttons should be extinguished under normal operations. Gravity XFLOW Press to begin the process, there's a 1 second delay after pushing the button for it to illuminate OPEN. This will allow fuel to flow freely between both main (wing-based) tanks. There is no EICAS notification that this is open/occurring. (gravity.png) To observe what's happening in the sim. You can go to the Challenger 650 menu -> Study -> Engines -> Fuel System... You'll notice that whatever Main Tank (either Left or Right) has more fuel that this will continue to consume, whereas the side with less fuel will not. Thus balancing the tanks. L (R) to AUX XFLOW Press the appropriate button to begin the process, there's a 1 second delay after pushing the button for it to illuminate ON. This will remove fuel from whatever side is select and transfer it to the auxiliary tank. Determine which tank has more weight in fuel Left side? Choose L to AUX (L to AUX.png) Right side? Choose R to AUX (R to AUX.png) There is a lock out mechanism that does not allow you to press the opposite button when one is already selected. Pressing L to AUX, for example, then pressing R to AUX, will no longer illuminate the L to AUX button. Pressing the R to AUX button again will resume the L to AUX transfer and the button will illuminate ON again. Once you're done balancing the tank, make sure to deselect the previously selected L (R) to AUX button. The aircraft will now suspend fuel consumption from the two main tanks and pull from the AUX tank until depleted. *Edit* Thanks! @airforce2 As long as a main tank is below 93% full, the aux tank feeds the main tank to maintain the level at 93%. Once a main drops to 93%, the main quantity will remain constant and the aux level will drop. It will appear that the engines are burning from the aux tank, but in reality the engines are burning from the mains and that fuel is being simultaneously replaced in the main tank from the aux tank ejector xfer pumps. To observe what's happening in the sim. You can go to the Challenger 650 menu -> Study -> Engines -> Fuel System... Note: The plane will display an EICAS warning message: FUEL XFLOW SOV OPEN if either button is ON for more than 50 seconds and the tanks are balanced within 100 lbs.

View File OH-WIC Hot Start Challenger This is a livery for the Hot Start Challenger 650, inspired by https://www.jetphotos.com/registration/OH-WIC To install, extract the zip file into the "liveries" folder. You can supply your own registration, OH-WIC is not printed on the cowlings. Submitter pilotdeviation Submitted 04/05/2024 Category Hot Start Challenger 650 Livery For https://www.x-aviation.com/catalog/product_info.php/take-command-hot-start-challenger-650-p-212  

Once you’re down to those levels the sensors are unreliable and not all fuel in the tanks is even usable. You should be planning to land with 4,000 lbs, obviously something went rather wrong in your fuel planning.

In a long conversation with BBA yesterday we learned that BBA advises to equalize left and right mains BEFORE departure using the L (usually) to AUX pumps, even if the difference is lower that the limit of 400 lbs. This in order to avoid CAS fuel imbalance messages after departure which could be triggered by banking and 'sloshing' in the tanks