Fuel System Flashcards
How is fuel supplied to the engines if on battery power only?
Gravity feed from outer tanks till empty then inner tanks to
4400 lbs
How is the Center of Gravity Control Computer (CGCC)
activated?
At least 1 trim tank pump and CGCC Mode switch in AUTO
What are the 3 modes of operation for the CGCC?
Normal, Alternate, Fault mode
When does the CGCC normally allow forward and aft transfer?
During climb out passing 20,500’
When does the CGCC normally fast forward to empty the trim
tank before landing?
Descending through 20,000’
Can the aircraft automatically balance the fuel inflight?
Yes, the CGCC system will attempt to keep the inner tanks
within 440 lbs of each other during aft transfer of fuel
While operating with only standby generator power, what fuel
pumps remain operable?
Left inner 2, Right inner 1, and Left center tank
When the Avionics Smoke Drill is active, what is the normal
operating sequence of the fuel pumps?
Left inner 2, Right inner 1, and Left center tank, one at a time
What is the minimum number of fuel pumps needed to supply
both engines at maximum thrust (x-feed valve open)?
Only one
How long will the automatic fuel feed system allow the center
tank pumps to feed on approach if the inner and outer tanks
are not empty?
Three minutes after slat extension
When do the LOW FUEL warning lights illuminate?
When the outer tanks are less than 1985 lbs
The center tank is considered empty when it contains less than
_____ pounds.
400
When does the auto fuel feed system prohibit center tank
feeding?
Three minutes after slat extension
What is the approximate total fuel capacity for the A300?
120,000 LBS
If the auto fuel feed system is operating normally, what is
required of the crew to ensure wing tank to engine feed for
the approach and landing?
Nothing, the auto fuel feed system will automatically switch
from the center tank to wing tanks
What is the primary purpose to dispatch in PAYLOAD mode?
It allows a higher max landing weight
On the A300, what fuel tanks can gravity feed the engines?
Inner wing tanks down to 4,400 lbs, and outer wing tanks until
empty
Which fuel tank pumps does the auto fuel feed system have
direct control of?
Auto Fuel Feed system utilizes center and inner fuel tank
pumps
On the ground, what does the illumination of the TRIM TK ISOL
VALVE flow bar indicate?
The refueling panel door is open
Once the Auto Fuel Feed system is activated, what is the
minimum number of fuel pumps required to maintain
operation?
One in either Inner Tank and a Center Tank pump, 2
Is there a difference in the AC powered fuel boost pumps?
No, Outer tank pumps have sequence valves to reduce output
pressures
Where is the exact quantity of fuel in the Center Tank
displayed?
ECAM Fuel page
While operating with the CGCC in Payload Mode, what parts of
the Fuel System are deactivated?
FWD and AFT Transfer valves
What is the purpose of the fuel crossfeed valve?
Fuel supply to both engines from any tank
If a flight is flown below 20,000 feet (FL200) what will the
Center of Gravity Control Computer system (CGCC) do to
balance fuel?
Only allow forward transfer of fuel
After takeoff, when does the Trim Tank Isolation Valve open?
Landing Gear and SLATS retracted
When operating the A300 CGCC system in RANGE mode, when
will FWD fuel transfer be allowed?
After takeoff, Landing Gear and SLATS retracted
When operating the A300 CGCC system in RANGE mode, when
will AFT fuel transfer be allowed?
Above FL 205
What is normal fuel usage priority?
Center, Inner, Outer tanks
Where is the TOTAL fuel onboard permanently displayed?
On the ECAM MEMO and ECAM FUEL pages
What is the minimum number of fuel pumps required to
initiate the automatic fuel feed system?
One in each Inner Tank and a Center Tank, 3
What does a dash (-) in the place of the last digit on the fuel
quantity indicator mean?
Slight degradation of system accuracy (PLUS or MINUS 100 lbs)
When does the Fuel Crossfeed Valve automatically open?
Standby generator operation and Avionics Smoke Drill
The trim tank is considered considered empty when it contains
less than _____ pounds.
70
If inner tanks contain any fuel, both outer tanks must be _____
pounds or greater.
7800
When operating in range mode with the inner fuel tanks not
completely full, what is the maximum amount of fuel that can
be in the center tank?
10000
When operating in Payload Mode, how much fuel can be in
the center tank?
less than 400
