Fuel System Flashcards
Fuel is stored in two INTEGRAL wing tanks, interconnected by a _______
crossfeed valve
CROSSFEED SELECTOR KNOB
LOW 1:
OFF:
LOW 2:
LOW 1: opens the crossfeed valve and automatically activates the right AC fuel pump (AC PUMP 2), supplying fuel to both engines from the right wing tank.
OFF: closes the crossfeed valve.
LOW 2: opens the crossfeed valve and automatically activates the left AC fuel pump (AC PUMP 1),
DC FUEL PUMP SELECTOR KNOB
OFF:
AUTO:
ON:
OFF: deactivates the DC fuel pump.
AUTO: automatically operates the DC fuel pump according to the system’s logic.
ON: activates the DC fuel pump
AC FUEL SELECTOR KNOBS
OFF:
AUTO:
ON:
OFF: deactivates the associated AC fuel pump.
AUTO: automatically operates the associated AC fuel pump according to the system’s logic.
ON: activates the associated AC fuel pump
the fuel temperature measured in the ____
left fuel tank.
Each INTEGRAL wing tank incorporates:
(1) a collector tank
(2) a surge tank
The collector tank (inboard section) _____
keeps the fuel pumps submerged, ensuring a
constant fuel flow to the respective engine.
The surge tank is designed to _____
collect any fuel that may enter the vent system during wing down and uncoordinated maneuvers
Each fuel tank is vented
through a vent tank in the ______
outboard section (surge tank) of the wing.
FUEL PUMPS
A. Each wing fuel tank contains the following pumps:
(1) Ejector fuel pump.
(2) Wing AC electric fuel pump.
(3) Three scavenge ejector pumps.
(4) DC electric fuel pump (right tank only
The primary wing fuel pump is a _____ , and is powered by the ____
venturi ejector pump (jet pump) with no moving
parts,
respective engine motive flow
WING AC FUEL PUMP
(1) The wing tanks AC electric fuel pump supplies fuel to the following components:
(a) Onside engine during engine starts.
(b) Cross side engine during crossfeed operations.
(c) APU, when engine is not running
The left wing AC electric fuel pump (AC PUMP 1) is powered by ____.
The right wing AC electric fuel pump (AC PUMP 2) is powered by ____
AC BUS 1.
AC ESS BUS.
SCAVENGE PUMPS
Three scavenge jet pumps maintain the fuel level in the _____, ensuring a constant flow of fuel to the engine during normal flight
collector tank,
DC FUEL PUMP
A DC electric fuel pump is installed only in the _____. It provides pressurized fuel for normal APU operation and engine start, when AC power or the AC fuel pump is not available. The DC electric fuel pump is powered by the____and can be used in flight or on ground
right wing tank.
DC ESS BUS 2
Under normal conditions, the low level warning activation point is set at______ of fuel in the associated wing tank
660 lb
There is a single pressurized refueling point and a refuel/defuel control panel located under the ______
right wing
fuel capacity per tank
10,392.5
fuel capacity total
20,935
fuel type
JP8
min fuel temperature
-37
in case of an electrical emergency, the ____ will be supplied by the RAT
right AC fuel pump
A DC powered electrical fuel pump located in the right hand collector tank provides a source of
pressurized fuel supply for APU and engine start in flight or on the ground if the engine ejector pump and AC power or the AC fuel pump are not available
the fire handle will close
engine fuel SOV
crossfeed is not to be used during
takeoff and landing
unusable fuel per tank
75 lbs
max fuel imbalance
794
How many water fuel drains?
4 drains and is usually done by MX
How many Magnetic Level Indicators are there?
3 per wing (6 total)
What happens to fuel flow if the scavenge pumps fails?
Fuel will begin equalizing with the integral tank until they are the same level (may get FUEL LO indications)
name of APU
sunstrand APS 2300
