Fuel Flashcards
Where is fuel stored?
In the wing tanks that are part of the internal wing structure; there are no bladders.
Describe location and capacity of
hopper tanks.
Inside each wing tank, adjacent to
centerline rib, is a hopper that holds
approximately 1100 pounds of fuel for
G500 and 1170 pounds for G600.
What’s the purpose of ventilation
system?
It protects from over and under
pressurization by allowing air, fuel vapors,
and fuel to move about or flow freely.
Vent tubes are connected to empty chamber or plenum which is located at wing tip, just outboard of fuel tanks. What’s the capacity of plenum and vent tubes?
They provide for 2% fuel expansion
What’s indicated if HIGH LEVEL
WARN lights illuminate on refuel
panel?
High level sensors are wet and Fuel Quantity Signal Conditioner (FQSC) has
closed respective refueling valve
What happens when REMOTE FUEL
SHUTOFF switch is selected on
OHPTS?
Switch label turns green and both pressure
fueling shutoff valves close
What are the different methods of
refueling?
Single point pressure fueling or over-the-wing
G600 Fuel Capacity Pressure refueling: 41,500lbs.
Overwing gravity refueling: 33,500 lbs.
G500 Fuel Capacity Pressure refueling: 30,250 lbs.
Overwing gravity refueling: 22,500 lbs.
How is automatic refueling
controlled?
From Touch Screen Controller (TSC) or
refuel panel located at fueling station
How many methods are there for
maintaining fuel balance?
Two: by moving fuel from hopper to
hopper through intertank valve, or by
directing fuel from one hopper to opposite
engine using crossflow valve.
How many boost pumps does GVII
have and where are they located?
There are four (4) identical and
interchangeable fuel boost pumps in main
wheel wells attached to aft portion of each
hopper.
What’s the purpose of fuel boost
pumps?
They deliver fuel to engines and APU at
relatively low pressure through various
fuel distribution lines and shutoff valves.
How does fuel flow into hopper?
Through ejector pumps and flapper type
check valves
How do ejectors operate?
They require only fuel boost pump
pressure to operate: they’re low pressure,
high volume jet pumps. As long as there’s
boost pump pressure, ejector pumps
deliver steady flow of fuel into each
hopper.
What happens when crossflow valve
is opened?
Boost pump manifolds are joined allowing
pressurized fuel from functioning pumps
to flow to both engines.
When do white Fuel Crossflow Valve
Open and Fuel Inter Tank Valve Open
CAS messages change to blue?
After five (5) minutes
