Page 42 - Demo

2.10/26
REV 4
A330
REV 4
PAGE 26
FUEL LEAK
A fuel leak may be detected, if :
The sum of the FOB and FU is significantly less than FOB at
engine start, or is decreasing, or
A passenger observes a fuel spra y from an engine / pylon or a
wing tip, or
The total fuel quantity is decreasing at an abnormal rate, or
A fuel imbalance is developing, or
Fuel quantity in a tank is decreasing too fast (leak from engine /
pylon, or hole in a tank), or
A tank is overflowing (due to a pipe rupture in a tank), or
The Fuel Flow is excessive (engine leak), or
Fuel is smelt in the cabin
If visibility permits, leak source may be identified by a visual check from the cabin.
WHEN A LEAK IS CONFIRMED LAND ASAP
■ LEAK FROM ENGINE / PYLON CONFIRMED :
Engine fuel leak can be confi rmed by exc essive fuel flow indication, or a visual check.
– THR LEVER (of affected engine)........................... IDLE – ENG MASTER (of affected engine) ........................ OFF – FUEL X FEED ..........................................USE AS RQRD
If the leak stops, the X feed valve can now be opened to re-balance fuel quantity , or to enable use of fuel from both wings. Do not restart the engine.
■ LEAK FROM ENGINE / PYLON NOT CONFIRMED or LEAK NOT LOCATED :
Stop any fuel transfer, and then monitor the depletion rate of each inner tank, to determine if the leak is from an engine or a wing (Case 1), or from the Trim tank, or the APU / T rim feeding line (Case 2).
– FUEL X FEED................................. MAINTAIN CLOSED The X feed valve must remain closed to prevent the leak from affecting both sides.
– T TANK FEED.......................................................... ISOL – INNER TANKS FUEL QUANTITIES ................MONITOR
Monitor the depletion rate of each inner tank.
■ CASE 1 : IF ONE INNER TANK DEPLETES FASTER THAN THE OTHER BY AT LEAST 1100 lb IN LESS THAN 30 MINUTES :
An engine leak may still be suspected. Therefore :
– THR LEVER (engine on leaking side) .............. IDLE – ENG MASTER (engine on leaking side)............ OFF – FUEL LEAK ................................................MONITOR
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