FUEL Flashcards
Which hopper supplies the APU?
Left
Which fuel Hopper has the fuel tank temp sensor?
Both
Fuel quantity system test results in the following indications:
7000/7000/14000 in amber inverse video on synoptic pages and an amber “L-R FUEL LEVEL LOW” CAS
If electrical power is lost to the fuel pumps, will the engines still run?
Suction feed available/sufficient below 20,000’
If automatic refueling has been accomplished since the last flight, you should check that the:
Auto refuel switch on the Remote Refueling Panel is selected “OFF”
On EMER BATTS the pilot can see the fuel quantity by
looking at MCDU 1
How do you transfer fuel from tank to tank?
Intertank valve
During pressure refueling the FQSC is supposed to open and close valves to keep the fuel imbalance to less than
500 lbs. The valve opens again when the imbalance reaches 100 lbs
What level triggers the FUEL LEVEL LOW CAS?
650 lbs
The Hoppers can hold how much fuel?
190 gallons / 1283 lbs
When will Blue “FUEL IMBALANCE” CAS illuminate in flight?
imbalance greater than 1000 lbs
Max fuel load at normal density? Can you exceed that?
41,300 lbs. Yes, as long as max a/c weight isn’t exceeded.
When does the HFRS open activate and deactivate?
Valve opens at 0°C and stops at 10°C.
What systems does FADEC monitor in order to operate the HFRS?
Cockpit overhead panel switch to "AUTO" Fire Handle Engine Fuel LOW pressure Engine Fuel LOW quantity Engine Fuel flow >2,250/engine Fuel Filter not blocked X-Flow valve Fuel temp Electrical power to Fuel Return to Tank valve
What are the electrical power sources for the Fuel Pumps?
L MAIN - L ESS DC
L ALT - L MAIN DC
R MAIN - R ESS DC
R ALT - R MAIN DC
How is a fuel balance problem corrected using the crossflow valve?
Opening the crossflow valve and turning off both fuel pumps on the light wing
When must fuel balancing be done using the intertank valve?
When the Tank temp is less than 0° C
What is the max fuel imbalance during refueling?
2000lbs
What are the correct indications during the fuel quantity indicator test?
L/R - 7000 lbs Total - 14,000 lbs
Amber L-R FUEL LEVEL LOW CAS message
How much fuel is remaining in the hopper when an amber “L-R FUEL LEVEL LOW” CAS appears?
Approx 650 lbs
What is the function of the pressure fueling static port under each wing?
It provides a reference pressure to prevent overpressurization of the wing during fueling operations
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
If a main fuel boost pump should fail, will the alternate fuel boost pump automatically come on, if selected OFF?
No. There is no auto-change feature
Which part of the fuel system will be available when powering the aircraft with HMG power only?
Left and Right MAIN boost pumps, and crossflow and intertank valves
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 fueling should be stopped
When does the Heated Fuel Return system automatically turn on?
either fuel tank temp reaches 0° C or below
If an Amber L or R FUEL LOW LEVEL message appears with more than 650 lbs of fuel indicating in the respective tank, what should you do?
Descend without delay to a warmer level (above -60°C) at a minimum of 0.80 Mach.
Where are the fuel boost pumps located?
On the forward wall of each wheel well.
What are the AMBER and RED fuel tank temp ranges?
RED: +54°C and above
AMBER: -35°C to -36°C
RED: -37°C and below
Where does the fuel shut off if a fire handle gets pulled?
At the fuel firewall shutoff valve near the boost pump (wheel well)
When can pilot NOT use crossflow valve in flight?
Tank temp below 0°C
When does the HFRS automatically shut off?
After it’s activated, when fuel tank temp >+10°C
Engine Fuel Flow is >2,250 pph
Crossflow valve open
How many fuel probes in each wing?
19
What powers the Fuel Quantity Signal Conditioner?
Ground
In-Flight
Ground Service Bus
Right Emergency battery bus
If Amber “Fuel Tank Temperature” CAS illuminates with more than 1000lbs indicating in either tank, aircraft is above 35,000 and tank temp >-35°C, what is the problem?
There’s less than 1000 lbs in the hopper.
