Fuel Flashcards
How is a fuel balance problem corrected using the crossflow valve?
Open crossflow valve, turn off pump(s) on lighter side
What are the correct indications during the fuel quantity indicator test?
Left - 7000, Right - 7000, Total - 14000, Amber L-R FUEL LEVEL LOW CAS message
If an amber L or R FUEL LEVEL LOW message appears on the CAS with more than 650 lbs of fuel remaining in the respective wing, what should be done?
Descend without delay to a warmer altitude at a minimum speed of 0.80 M
Where is the fuel hopper located?
Inboard portion of each wing tank
The automatic refueling system (ground service panel) uses electrical power from what source?
Ground service bus
Fuel low level warning is provided by low level sensors, which are installed where in the wing?
Hopper
Where are the fuel boost pumps located?
Wheel well
What is the function of the pressure fueling static port located under each wing?
It provides a reference pressure to prevent over pressurization of the wing during fueling ops
How are the main fuel shutoff valves checked during the preflight walkaround?
Verify that the valves are open by physically checking that the red valve position indicator is in approximately the 7 o’clock position
When and how are fuel quantity updates performed?
Hourly, using data from the FQMS. On FMS PERF INIT page 5/5, perform a “delete” to line select key 2L
What are the electrical power sources of the fuel boost pumps?
L & R MAIN: L & R ESS DC BUS
L & R ALT: L & R MAIN DC BUS
How much fuel is remaining in the hopper when an amber L-R FUEL LEVEL LOW CAS message appears?
Approximately 650 lbs
How much fuel is in the hopper?
190 gallons
What is the maximum fuel load?
41,300 lbs
Max fuel imbalance
1000 for takeoff
2000 in flight
2000 during refueling
If a main boost pump should fail, will the alternate boost pump automatically come on if selected off?
No, there’s no auto-change feature
If you are powering the aircraft in HMG only, which part of the fuel system will be available?
L & R MAIN boos pumps
Crossflow & intertank valve
When do the RED and AMBER messages come ON for fuel TEMP?
RED: below -37C or above +54C
AMBER: between -35C and -36C -OR-
Tank temp above -35C above 35,000ft with >1000 in either or both tanks but only 1000 left in hopper
Explain what you are looking for when you conduct the Fuel System Test
AMBER L-R Fuel Level Low message
AMBER 7000/7000/14000 in all areas and the synoptic page displaying fuel information
When must fuel balancing be done using the inter-tank valve?
Tank temp < 0C
If the RED light on the refueling door illuminates during refueling, what does this mean and what should be done?
The fuel has reached the plenum and you should shut off fueling
If an Engine Fire Handle is pulled, where is the fuel shut OFF?
At the boost pumps in the wheel well
The engines should run without boost pump pressure up to what maximum altitude?
< 20,000 ft
If 2 boost pumps fail on the same side, how would you keep the fuel balanced?
By opening the inter-tank valve and using a sideslip (nose toward the heavy wing)
