Fuel System Flashcards
What is the total usable fuel capacity of the aircraft?
78.2 gallons
This includes all tanks filled.
What are the approved fuels for the aircraft?
Jet A or Jet A-1
These fuels are specifically approved for use in the aircraft.
What fuel additive is allowed in the aircraft’s fuel system?
PRIST
This additive serves anti-icing and antimicrobial purposes.
How many main fuel tanks does the aircraft have?
2 main fuel tanks
One tank is located in each wing.
What is the usable fuel capacity of each main fuel tank?
25.4 gallons
Total usable fuel from both main tanks is 50.8 gallons.
What feature allows air to enter the main fuel tanks as fuel is consumed?
Fuel tank vent with a check valve
This vent is located under the wing.
What happens if the fuel temperature exceeds 75˚C?
L/R FUEL TEMP message activates
This alerts the pilot to high fuel temperature.
What activates the L/R FUEL LOW message?
Low fuel sensor when 3-4 US gallons remain
This indicates that fuel is running low.
What is the capacity of each auxiliary fuel tank?
13.7 gallons usable
Total usable fuel from both auxiliary tanks is 27.4 gallons.
Where are the auxiliary fuel tanks located?
Behind each engine
This positioning is crucial for fuel management.
Can engines consume fuel directly from the auxiliary tanks?
No
Auxiliary fuel must be transferred to the main tank on the same side.
What is the caution regarding auxiliary fuel tank doors?
Ensure they are closed and locked before flight
This is critical for safety.
What is the maximum fuel consumption rate per engine?
7 GPH
This is the maximum amount that each engine can consume.
What happens to excess pressurized fuel?
It passes through a pressure relief valve to a fuel cooler
This process helps maintain normal fuel temperatures.
Where is the fuel cooler located in the DA42VI?
Inside the engine nacelle
This differs from previous models.
What is the purpose of the fuel cooler air intake and exhaust openings?
To regulate fuel temperature
Located underneath each engine nacelle.
Fill in the blank: Each main fuel tank consists of ______ chambers.
three aluminum
These chambers are connected by rubber hoses.
What is the function of the fuel selector in the DA42?
Fuel is fed to each engine through a selector.
What does the ON position of the fuel selector do?
Engine will draw fuel from the main tank on the same side.
What happens when the fuel selector is set to X-FEED?
Engine draws fuel from tank on the opposite side.
What does the OFF position of the fuel selector indicate?
Engine is not able to draw fuel from any fuel tank.
True or False: Selecting OFF while an engine is running can damage the high pressure fuel pump.
True
What is displayed when one or both auxiliary fuel pumps are running?
L/R FUEL XFER
What turns off the transfer pump in the main tank?
Fuel sensor in outboard chamber of main tank when it is full.
What happens when the auxiliary tank is empty?
Fuel sensor in each auxiliary tank will turn the auxiliary transfer pump off.
What is displayed when an auxiliary tank is empty with an AUX PUMP turned ON?
L/R AUX FUEL E
Fill in the blank: Auxiliary tanks do not receive heated fuel returned from the _______.
high-pressure fuel injection system
What supplies fuel to the common rail fuel injection system?
1 high-pressure, engine-driven fuel pump per engine.
What is the pressure at which the high-pressure fuel pumps supply fuel?
Over 15,000 PSI.
What does the low-pressure fuel pump do?
Delivers fuel from the main tank to the high-pressure pump.
How many electric fuel pumps are there per engine in the DA42NG?
1 electric fuel pump per engine is always running.
What happens when the Fuel Pump switches are ON?
All 4 electric fuel pumps are active.
When must the Fuel Pump switches be OFF?
Before selecting CROSSFEED or the high-pressure fuel pump may be damaged.
What is the total number of low-pressure electric fuel pumps in the DA42NG?
Total of 4.
What is the purpose of the VOTER switch?
Changing ECUs will change the active fuel pump.
When should the Fuel Pump switches be ON?
Takeoff, Approach, Landing.
What is the maximum left-right fuel imbalance?
5 gallons
This limitation ensures safe flight operations.
What is the minimum fuel temperature?
-25˚C
This is critical to prevent fuel freezing and maintain performance.
What is the maximum fuel temperature?
60˚C
Exceeding this temperature can compromise fuel integrity.
How many main wing tank drains are there?
2
One drain is located under each wing, outboard of the engine nacelles.
What should be checked in the fuel?
Water, sediment and contaminants
These checks are essential for engine health.
What personal protective equipment should be worn when handling jet fuel?
Gloves
Gloves protect the skin from harmful chemicals in jet fuel.
Where are the fuel filter drains located?
At the base of the fuel filter, on the underside of each engine’s nacelle
These drains help maintain fuel system cleanliness.
How many auxiliary tank drains are there when optional tanks are installed?
2
One drain is located at the rear of each engine nacelle.
What does the G1000 indicate regarding fuel?
Fuel remaining in the main fuel tanks using fuel sensors located in the outer and inner chambers of each main tank.
Are there fuel gauges provided for the optional auxiliary tanks?
No.
When should the G1000 fuel totalizer be reset?
After refueling using the Engine->Fuel soft keys on MFD.
What is the purpose of the fuel measuring device?
To verify the exact quantity of fuel in each main tank.
How should the fuel measuring device be used?
Place the base of the scale on the leading edge of the wing, outboard of the engine nacelle.
What is the first step in using the fuel measuring device?
Firmly insert the fitting on the rubber hose into the fuel tank sump and hold.
What should you do while waiting for the fuel level inside the scale to stabilize?
Wear gloves to protect skin from spilled fuel.
How do you read the amount of fuel available using the fuel measuring device?
Read the amount of fuel available on the scale.
What does KOEL stand for in the context of the fuel measuring device?
Key Operating Equipment List.
What does the AFM Limitations chapter state about the fuel measuring device?
The fuel measuring device is required to be on board.
Can the fuel measuring device be used to measure fuel in the optional auxiliary fuel tanks?
No.
What should be done with the LEFT / RIGHT ENGINE MASTER switches during refueling?
OFF
What should be done with the ELECTRIC MASTER switch during refueling?
OFF
What is the first step to take before refueling?
Disembark all passengers
What should not be operated near the aircraft or fuel source during refueling?
Electrically-powered equipment
What should be ensured is available during refueling?
A suitable fire extinguisher
What must the aircraft be bonded to during refueling?
Fueling source to eliminate static electrical potential
Where should the bonding wire clamp be connected?
Either left or right engine exhaust stack
What does the CAS message ‘L/R AUX FUEL E’ indicate?
Auxiliary fuel level warning
What does the CAS message ‘L/R FUEL LOW’ indicate?
Low fuel level warning
What does the CAS message ‘L/R FUEL TEMP’ indicate?
Fuel temperature warning
What does the CAS message ‘L/R FUEL XFER’ indicate?
Fuel transfer status
