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• [a330:trim_tank_transfers]

Trim Tank Transfers

Automatic CG control begins on climb at FL255 and ends on descent at FL245 or time to destination is 35 mins (or 75 mins with trim forward transfer pump failure).

Aft transfer

Requires these conditions:

• landing gear and slats retracted;
• trim tank not full;
• inner tank fuel quantity above 6250 kg;
• aircraft above FL255; and
• aircraft CG not on target.

Stops when:

• computed CG = target CG - 0.5%;
• trim tank full;
• inner tank fuel quantity reaches 6250 kg;
• T Tank pb selected FWD; or
• manual transfer from outer to inner tanks.

Forward transfer

Requires these conditions:

• CG = target. Stops when CG = target - 0.5%.
• One of inner tanks reaches 4000 kg. Stops when it reaches 5000 kg.
• Time to destination signal or descent below FL245.

Normal operation

Categories: Airbus A330 | Fuel System