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Old 25th Feb 2008, 12:38
  #402 (permalink)  
bsieker
 
Join Date: Jul 2007
Location: Germany
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snanceki,

The scavenge pumps have float-operated shutoff valves, to keep them from pumping (a) out of a full centre tank and (b) into a full wing tank.

The boost pumps have no such valve.
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