Small Fuel disperencies

[OAL260 Christos Makris]

Did a flight today with the JS41.

After landing report

Fuel Used for taxi 65.3KG
Fuels used for flight 904.50KG
Total fuel used 969.80KG

Start fuel was 2628.10. So the remaining fuel on aircraft should be 1658.3KG.

However when I go to book another flight with same aircrafe it gives me that the fuel on board is 1693KG. There is a difference of 35KG. Not much but I do not know what is happening on the larger aircraft.

[OAL853 Nick Papandreou]

In the "Flight Details" page, there's a small difference between the Start Fuel Quantity reading , the End Fuel Quantity reading and the real values. It's because of a tiny bug in the ACARS code. In order to compute the starting fuel quantity, ZFW is subtracted from GrossWeight. ACARS sends back the grossweight of the aircraft during the take off stage though and that's why there's a difference in values.

So, Real End Fuel Quantity =~ End Fuel Quantity + 1/2 taxi fuel used (approx). The higher the fuel burn rate of the aircraft is, the higher the fuel used for taxi and thus the deviation will be.