FUEL SYSTEM Flashcards
The fuel system supply fuel to?
Engines and Apu
Fuel qty is measured by….?
Fuel sensor in each tank
Where is displayed the TOTAL FUEL QTY?
Is displayed in the PRIMARY EICAS DISPLAY
Where are displayed the TANK QUANTITIES plus the TOTAL FUEL QTY?
In the FUEL SYNOPTIC DISPLAY
When the Fuel INDICATION GET EXPANDED SHOWING THE L,C,R FUEL QUANTITIES?
When No-Normal conditions occurs :
One or both crossfeed valves open
One or more fuel tank qty indications are inop
FUEL IN CENTER
FUEL QTY LOW
FUEL IMBALANCE
FUEL FLOW ENG R,L
Where is displayed the FUEL TEMP?
On the primary EICAS DISPLAY
Which color are used to display the FUEL TEMP ON THE PRIMARY EICAS DISPLAY?
White - Normal
Amber - approaching the freezing fuel temp displayed in the FMS CDU
During JETTISON WHAT REPLACES THE TEMPERATURE DISPLAY IN THE PRIMARY EICAS DISPLAY?
TO REMAIN QTY
Where are also displayed FUEL TEMP AND MINIMUM FUEL TEMP?
FUEL SYNOPTIC DISPLAY
What is the NGS NITROGEN SYS? And which functions has?
Converts the bleed air into NITROGEN-ENRICHED AIR to reduce the flammability of the center wing tank fuel during all phases of flight and for a brief period after landing.
When the NGS IS SHUTDOWN (SHED)
In engine out operation, or EQUIPMENT COOLING IS OFF OR A CARGO FIRE ARM SWITCH IS ARMED
How many fuel pumps each tank has?
Each tank has 2 AC fuel pumps
A single
Pump can….
Supply sufficient fuel to operate an engine in all conditions
The center tank fuel pumps are ?
Jettison//override fuel
Pump
Which fuel is used first in between center and main tanks?
Center tank fuel is used first as the center tank jettison override the main tank pumps
After how long the center tank fuel pumps shutoff automatically?
15 seconds of continuous LOW PRESSURE
When the center tank pump automatic shut off is inhibited?
During jettison
For which pumps is the PRESS lights inhibited on grd when off?
Center tank jettison override pumps
How many electrical source we need on grd to run both center tank fuel pumps?
2 elect source to run the both center tank fuel pumps
In which tank is located the DC-POWERED FUEL PUMP?
In the left main tank to supply fuel to the APU
Are surge tanks provided?
Yes in each wing tank
When is DISPLAYED THE FUEL IN CENTER?
When both center pumps are off and there is fuel is in the center tank
When is FUEL LOW CENTER DISPLAYED
When both center tank fuel pumps are ON and fuel qty indications the center tank is low
When is working the scavenge system?
When the center tanks pumps are not working the main tank fuel jettison pumps transfer the fuel from the center tank to the main tanks
