PPRuNe Forums - View Single Post - A320 fuel/tank feed at engine start
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Old 1st Jun 2021, 08:25
  #10 (permalink)  
Join Date: Nov 1999
Location: UK
Posts: 1,682
Unless the cross-feed is open, each engine will only take fuel from its respective wing tank.

The fuel is fed from the centre tank and ACT tanks into the wing tanks, and is used in the sequence ACT 2, ACT 1, Centre tank, Wing tanks.

I can't find the specific text in the FCOM any more but my understanding was that around engine start the CTR pumps will run, (assuming fuel in the CTR tank), but when the Slats are out this will stop. The CTR tank pumps run presumably to allow any problems to reveal themselves on the ground that might render the CTR tank fuel unavailable for the flight. Fuel transfer is stopped during take-off and approach to prevent a tank contamination problem affecting all engines.

Edit, my post crossed with vilas
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