A320 Strange fuel consumption scenario!
Join Date: Jul 2002
Location: brisbane, Australia
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Just a few silly questions here
1."Why did you have fuel in the centre tank when you load total was less then 12.000 kg"s.??.pre take-off..
As someone has already mentioned the pump out-puts can vary a fair amount (including the centre pumps)Which incidently have the same output pressure as the wing pumps but are fitted with a higher pressure output check valve..
2."Why did you elect to turn the inboard wing tank pump off as opposed to the outboard.?" The Inboard pumps have a inbuilt "scavenge feature"
3."Did you notice if the IDG temp on Eng 1 was above 104 Degress C..?
"Wing tank fuel temps indicate that there was a lot of "Warm Fuel" returning.
1."Why did you have fuel in the centre tank when you load total was less then 12.000 kg"s.??.pre take-off..
As someone has already mentioned the pump out-puts can vary a fair amount (including the centre pumps)Which incidently have the same output pressure as the wing pumps but are fitted with a higher pressure output check valve..
2."Why did you elect to turn the inboard wing tank pump off as opposed to the outboard.?" The Inboard pumps have a inbuilt "scavenge feature"
3."Did you notice if the IDG temp on Eng 1 was above 104 Degress C..?
"Wing tank fuel temps indicate that there was a lot of "Warm Fuel" returning.
Join Date: Mar 2005
Location: Uh... Where was I?
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Lantirn that's a good reference!
Vilas: regarding the EFATO ECAM. I always thought that the reason for the IMBALANCE line in the ECAM was because of a possible leak due to a rupture of a line or hole in a tank, like a way to cater for an uncontained failure situation.
Like someone said above, "best pump wins".
Most importantly: don't invent procedures, specially those related with fuel.
I had a similar scenario. A 4 hour flight, full house, an imbalance was developing. Fuel checks and leak check confirmed everything OK, except the umbalance, progressively increasing. Captain said do nothing until ECAM comes. It came after a good deal of flight with "cross controls" (slip angle to the left, couple of degrees to the right).
I think it was because of a center pump performing way better than the other, so one inner tank started using its fuel way earlier than the other, to the point of reaching the ECAM trigger point.
Vilas: regarding the EFATO ECAM. I always thought that the reason for the IMBALANCE line in the ECAM was because of a possible leak due to a rupture of a line or hole in a tank, like a way to cater for an uncontained failure situation.
Like someone said above, "best pump wins".
Most importantly: don't invent procedures, specially those related with fuel.
I had a similar scenario. A 4 hour flight, full house, an imbalance was developing. Fuel checks and leak check confirmed everything OK, except the umbalance, progressively increasing. Captain said do nothing until ECAM comes. It came after a good deal of flight with "cross controls" (slip angle to the left, couple of degrees to the right).
I think it was because of a center pump performing way better than the other, so one inner tank started using its fuel way earlier than the other, to the point of reaching the ECAM trigger point.
