Systems FUEL Flashcards
(24 cards)
Where are the surge tanks located
Outboard of each wing tank
FCOM 1 11-02-2
NACA scoops in each surge tank provide inflight ___
and on the ground ___
Positive ram air pressure
Static ventilation and air pressure relief
FCOM 1 11-02-3
During auto fuel balancing both ___ receive fuel directly from the fullest tank until fuel quantities are within ___
When is it activated
Both Engines
Until quantities are within 45 kg
Activated when imbalance of 180 kg is sensed
Only activated when centre tank is empty
FCOM 1 11-04-9
How much fuel can be manually transferred at a time
227 kg wing tank to wing tank
FCOM 1 11-04-3
454 kg wing tank to centre tank
FCOM 1 11-04-5
Which message displays on the EICAS when any tank to tank manual transfer is complete
FUEL MAN XFR COMPLETE
FCOM 1 11-04-3/5
Which tanks provide fuel delivery to the engines and APU
Collector tanks
FCOM 1 11-02-1
How is fuel moved from the main tanks to the collector tanks
One way flapper check valves
FCOM 1 11-02-1
Scavenge ejector pumps
FCOM 1 11-03-11
Scavenge ejector pumps require
Motive flow from the EDP to operate
FCOM 1 11-03-11
With the L and R BOOST PUMP rotary switches set to AUTO, which conditions must occur for the AC boost pumps to operate
If one or both main fuel ejector pumps fail
FCOM 1 11-03-3
What is the requirement for MAN XFR and Gravity XFER prior to take off
Must be off
AFM limitations 02-10-2
What is the max fuel imbalance between the contents of the left and right tanks
454 kgs
AFM limitations 02-10-1
What is the minimum fuel for a Go Around
442 kgs per wing tank
10 degs nose up
AFM limitations 02-10-1
The centre tank is vented into
The left surge tank
FCOM 1 11-02-2
What controls and monitors the fuel system
A dual channel Fuel Quantity Computer
Channel 1 primary
Channel 2 backup
FCOM 1 11-01-1 11-05-1
If the FQC detects a mismatch between the measured and calculated fuel a
FUEL LEAK SUSPECT message is displayed on the EICAS
FCOM 1 11-05-2
What occurs when there is fuel in the centre tank and the fuel quantity of a wing tank is less than 85.6% of its max usable volume
A float valve opens so the centre tank transfer ejector pump can move fuel from centre to main until full
FCOM 1 11-03-13
What is the primary way to pump fuel from the Collector tanks to the Engines
Main Fuel Ejector Pumps
FCOM 1 11-03-3
Main Fuel Ejector Pumps require high pressure motive flow from which pumps to operate
Engine Driven Pumps EDP
FCOM 1 11-03-2
Main Fuel Ejector Pumps are backed up by
AC Boost pumps in each Collector tank
FCOM 1 11-03-2
AC Boost pumps in each Collector Tank provide
Engine fuel feed backup
APU fuel feed backup
Fuel crossfeed
Fuel transfer
Engine start support inflight
FCOM 1 11-03-2
The APU receives fuel through the left engine fuel line from which pumps
Left engine main fuel ejector pump
Left or Right AC boost pumps or
Suction feed if AC power is not available and the Left engine is not running
FCOM 1 11-03-7
When both boost pumps are in operation, automatic fuel balancing is
No longer available
FCOM 1 11-04-9
With the Right Engine inoperative and Left Engine above 85% N2, the only source of fuel to the Left Engine is
Left Wing tank because
Right AC pump powered by APU and not enough pressure to overcome left main fuel ejector pump pressure
FUEL IMBALANCE message will occur approx every 18 minutes
FCOM 1 11-04-14
The FUEL USED is reset to zero when
Either engine is started or when AC and DC power are removed from Aircraft
FCOM 1 11-05-2
