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
