Getting to Grips with Aircraft Weight and Balance(30)

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FMGC is too far aft, the target CG position in the FCMC is automatically shifted forward (by 1.5%
or 2%). If the resulting corrections are not enough to avoid the CG position to excess the FE
limit, an aft CG warning is triggered that requires a manual forward transfer.

In order to protect the aft CG limitation, the target also moves forward by 1.5% in case of FQI
data degradation or if ZFCG/ZFW have not been entered or need to be reinitialized.

B. FUEL SYSTEMS

d) Example of CG control operation
Automatic fuel transfers that actually happen during the flight depend on the initial amount of fuel in the tanks and on the aircraft Zero Fuel CG position.
The following table presents the different cases that can be encountered according to the initial conditions (CG position and fuel quantity):
(Metric tonnes)  Refuel vector  Depletion vector CG control band 

Control band reached  Control band not reached 
A340-300 max full ~ 116.7 t  MTOW Collectors Trim Inner wings Outer wings Trim and center ACT Center depletion Inner depletion CGTrim fwd transfer  control  MTOW Center + ACT depletion Inner depletion Trim fwd transfer 
MTOW  MTOW 
A340-300 wings full ~ 75.3 t  Trim fwd transfer Trim aft transfer CGcontrol  Trim fwd transfer Trim aft transfer Inner depletion 
A340 wings half full ~ 60 t  MTOW Trim fwd transfer Trim aft transfer CGcontrol  MTOW Trim fwd transfer Trim aft transfer Inner depletion 

SYSTEMS

B. FUEL SYSTEMS

SYSTEMS

4. THE WIDE-BODY FAMILY (A300-600/A310)
4.1. Tanks and capacities

Note : One or 2 ACTs can be installed on A300-600 and A310-300. Please refer to the Weight and Balance Manual for applicable information.
Fuel Capacity (Usable fuel) . density: 0.782kg/L
A300-600 A300-600R  Outer Tanks (x2)  Inner Tanks (x2)  Center Tank  Total A300-600  Trim Tank  Total A300 -600R  ACT  Total A300 -600 1 ACT  Total A300 -600 2 ACTs 
Volume  Liters  4630  17570  17600  62000  6150  68150  7000  69000  76000 
US Gal  1223  4642  4650  16380  1625  18005  1849  18230  20079 
Weight  Kg  3621  13740  13763  48483  4809  53292  5474  53957  59431 
Lb  7982  30290  30342  106886  10602  117488  12068  118954  131022 

Fuel Capacity (Usable fuel) . density: 0.785kg/L

A310-200 A310-300  Outer Tanks (x2)  Inner Tanks (x2)  Center Tank  Total A310 -200  Trim Tank  Total A310 -300  ACT  Total A310 -300 1 ACT  Total A310 -300 2 ACTs 
Volume  Liters  3700  13950  19640  54940  6150  61090  7200  68290  75490 
　
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