I've notice when 737NG fly shorter distances they don't load any fuel into the centre tank! look at these Panel shots and the fuel loads!Petehttp://airliners.net/open.file/297847/L/http://airliners.net/open.file/451265/L/ http://airliners.net/open.file/468355/L/http://airliners.net/open.file/487424/L/http://airliners.net/open.file/404201/L/http://airliners.net/open.file/396821/L/http://airliners.net/open.file/364534/L/

Hi,I've read somewhere that in an airliner, when a low amount of fuel is required for a flight, they load the wings tanks first.This is for structural reason.Maybe an expert will answer the question with more precisionTake notice of the fuel quantity in the picts are in kgsregardsRapha